Jump to content

NASA’s Juno Gets a Close-Up Look at Lava Lakes on Jupiter’s Moon Io


Recommended Posts

  • Publishers
Posted

6 min read

Preparations for Next Moonwalk Simulations Underway (and Underwater)

Jupiter’s moon Io
The JunoCam instrument aboard NASA’s Juno spacecraft captured two volcanic plumes rising above the horizon of Jupiter’s moon Io. The image was taken Feb. 3 from a distance of about 2,400 miles (3,800 kilometers).
Image data: NASA/JPL-Caltech/SwRI/MSSS, Image processing by Andrea Luck (CC BY)

Infrared imagery from the solar-powered spacecraft heats up the discussion on the inner workings of Jupiter’s hottest moon.

New findings from NASA’s Juno probe provide a fuller picture of how widespread the lava lakes are on Jupiter’s moon Io and include first-time insights into the volcanic processes at work there. These results come courtesy of Juno’s Jovian Infrared Auroral Mapper (JIRAM) instrument, contributed by the Italian Space Agency, which “sees” in infrared light. Researchers published a paper on Juno’s most recent volcanic discoveries on June 20 in the journal Nature Communications Earth and Environment.

Io has intrigued the astronomers since 1610, when Galileo Galilei first discovered the Jovian moon, which is slightly larger than Earth. Some 369 years later, NASA’s Voyager 1 spacecraft captured a volcanic eruption on the moon. Subsequent missions to Jupiter, with more Io flybys, discovered additional plumes — along with lava lakes. Scientists now believe Io, which is stretched and squeezed like an accordion by neighboring moons and massive Jupiter itself, is the most volcanically active world in the solar system. But while there are many theories on the types of volcanic eruptions across the surface of the moon, little supporting data exists.

In both May and October 2023, Juno flew by Io, coming within about 21,700 miles (35,000 kilometers) and 8,100 miles (13,000 kilometers), respectively. Among Juno’s instruments getting a good look at the beguiling moon was JIRAM.

Infrared data
Infrared data collected Oct. 15, 2023, by the JIRAM instrument aboard NASA’s Juno shows Chors Patera, a lava lake on Jupiter’s moon Io. The team believes the lake is largely covered by a thick, molten crust, with a hot ring around the edges where lava from Io’s interior is directly exposed to space.
NASA/JPL-Caltech/SwRI/ASI/INAF/JIRAM/MSSS

Designed to capture the infrared light (which is not visible to the human eye) emerging from deep inside Jupiter, JIRAM probes the weather layer down to 30 to 45 miles (50 to 70 kilometers) below the gas giant’s cloud tops. But during Juno’s extended mission, the mission team has also used the instrument to study the moons Io, Europa, Ganymede, and Callisto. The JIRAM Io imagery showed the presence of bright rings surrounding the floors of numerous hot spots.

“The high spatial resolution of JIRAM’s infrared images, combined with the favorable position of Juno during the flybys, revealed that the whole surface of Io is covered by lava lakes contained in caldera-like features,” said Alessandro Mura, a Juno co-investigator from the National Institute for Astrophysics in Rome. “In the region of Io’s surface in which we have the most complete data, we estimate about 3% of it is covered by one of these molten lava lakes.” (A caldera is a large depression formed when a volcano erupts and collapses.)

Fire-Breathing Lakes

JIRAM’s Io flyby data not only highlights the moon’s abundant lava reserves, but also provides a glimpse of what may be going on below the surface. Infrared images of several Io lava lakes show a thin circle of lava at the border, between the central crust that covers most of the lava lake and the lake’s walls. Recycling of melt is implied by the lack of lava flows on and beyond the rim of the lake, indicating that there is a balance between melt that has erupted into the lava lakes and melt that is circulated back into the subsurface system.

This animation is an artist’s concept of Loki Patera, a lava lake on Jupiter’s moon Io, made using data from the JunoCam imager aboard NASA’s Juno spacecraft. With multiple islands in its interior, Loki is a depression filled with magma and rimmed with molten lava. NASA/JPL-Caltech/SwRI/MSSS

“We now have an idea of what is the most frequent type of volcanism on Io: enormous lakes of lava where magma goes up and down,” said Mura. “The lava crust is forced to break against the walls of the lake, forming the typical lava ring seen in Hawaiian lava lakes. The walls are likely hundreds of meters high, which explains why magma is generally not observed spilling out of the paterae” — bowl-shaped features created by volcanism — “and moving across the moon’s surface.”

JIRAM data suggests that most of the surface of these Io hot spots is composed of a rocky crust that moves up and down cyclically as one contiguous surface due to the central upwelling of magma. In this hypothesis, because the crust touches the lake’s walls, friction keeps it from sliding, causing it to deform and eventually break, exposing lava just below the surface.

An alternative hypothesis remains in play: Magma is welling up in the middle of the lake, spreading out and forming a crust that sinks along the rim of the lake, exposing lava.

“We are just starting to wade into the JIRAM results from the close flybys of Io in December 2023 and February 2024,” said Scott Bolton, principal investigator for Juno at the Southwest Research Institute in San Antonio. “The observations show fascinating new information on Io’s volcanic processes. Combining these new results with Juno’s longer-term campaign to monitor and map the volcanoes on Io’s never-before-seen north and south poles, JIRAM is turning out to be one of the most valuable tools to learn how this tortured world works.”

Juno executed its 62nd flyby of Jupiter — which included an Io flyby at an altitude of about 18,175 miles (29,250 kilometers) — on June 13. The 63rd flyby of the gas giant is scheduled for July 16.

More About the Mission

NASA’s Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Juno mission for the principal investigator, Scott Bolton, of the Southwest Research Institute in San Antonio. Juno is part of NASA’s New Frontiers Program, which is managed at NASA’s Marshall Space Flight Center in Huntsville, Alabama, for the agency’s Science Mission Directorate in Washington. The Italian Space Agency (ASI) funded the Jovian InfraRed Auroral Mapper. Lockheed Martin Space in Denver built and operates the spacecraft.

More information about Juno is available at:

https://science.nasa.gov/mission/juno

News Media Contacts

DC Agle
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-9011
agle@jpl.nasa.gov

Karen Fox / Charles Blue
NASA Headquarters
202-385-1287 / 202-802-5345
karen.c.fox@nasa.gov / charles.e.blue@nasa.gov

Deb Schmid
Southwest Research Institute, San Antonio
210-522-2254dschmid@swri.org

Share

Details

Last Updated
Jun 26, 2024

View the full article

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By NASA
      3 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      Launch of Blue Origin’s New Shepard suborbital rocket system on Feb. 4, 2025. During the flight test, the capsule at the top detached from the booster and spun at approximately 11 rpm to simulate lunar gravity for the NASA-supported payloads inside.Blue Origin The old saying — “Practice makes perfect!” — applies to the Moon too. On Tuesday, NASA gave 17 technologies, instruments, and experiments the chance to practice being on the Moon… without actually going there. Instead, it was a flight test aboard a vehicle adapted to simulate lunar gravity for approximately two minutes.
      The test began on February 4, 2025, with the 10:00 a.m. CST launch of Blue Origin’s New Shepard reusable suborbital rocket system in West Texas. With support from NASA’s Flight Opportunities program, the company, headquartered in Kent, Washington, enhanced the flight capabilities of its New Shepard capsule to replicate the Moon’s gravity — which is about one-sixth of Earth’s — during suborbital flight.
      “Commercial companies are critical to helping NASA prepare for missions to the Moon and beyond,” said Danielle McCulloch, program executive of the agency’s Flight Opportunities program. “The more similar a test environment is to a mission’s operating environment, the better. So, we provided substantial support to this flight test to expand the available vehicle capabilities, helping ensure technologies are ready for lunar exploration.”
      NASA’s Flight Opportunities program not only secured “seats” for the technologies aboard this flight — for 16 payloads inside the capsule plus one mounted externally — but also contributed to New Shepard’s upgrades to provide the environment needed to advance their readiness for the Moon and other space exploration missions.
      “An extended period of simulated lunar gravity is an important test regime for NASA,” said Greg Peters, program manager for Flight Opportunities. “It’s crucial to reducing risk for innovations that might one day go to the lunar surface.”
      One example is the LUCI (Lunar-g Combustion Investigation) payload, which seeks to understand material flammability on the Moon compared to Earth. This is an important component of astronaut safety in habitats on the Moon and could inform the design of potential combustion devices there. With support from the Moon to Mars Program Office within the Exploration Systems Development Mission Directorate, researchers at NASA’s Glenn Research Center in Cleveland, together with Voyager Technologies, designed LUCI to measure flame propagation directly during the Blue Origin flight.
      The rest of the NASA-supported payloads on this Blue Origin flight included seven from NASA’s Game Changing Development program that seek to mitigate the impact of lunar dust and to perform construction and excavation on the lunar surface. Three other NASA payloads tested instruments to detect subsurface water on the Moon as well as to study flow physics and phase changes in lunar gravity. Rounding out the manifest were payloads from Draper, Honeybee Robotics, Purdue University, and the University of California in Santa Barbara.
      Flight Opportunities is part of the agency’s Space Technology Mission Directorate and is managed at NASA’s Armstrong Flight Research Center.
      By Nancy Pekar, NASA’s Flight Opportunities program
      Keep Exploring Discover More …
      Space Technology Mission Directorate
      Armstrong Flight Research Center
      Flight Opportunities
      Game Changing Development
      Share
      Details
      Last Updated Feb 04, 2025 EditorLoura HallContactNancy J. Pekarnancy.j.pekar@nasa.gov Related Terms
      Ames Research Center Armstrong Flight Research Center Artemis Flight Opportunities Program Game Changing Development Program Space Technology Mission Directorate View the full article
    • By NASA
      NASA’s VIPER (Volatiles Investigating Polar Exploration Rover) sits outside a testing chamber after completing its thermal vacuum testing in the fall of 2024. Credit: NASA/JSC David DeHoyos To advance plans of securing a public/private partnership and land and operate NASA’s VIPER (Volatiles Investigating Polar Exploration Rover) mission on the Moon in collaboration with industry the agency announced Monday it is seeking U.S. proposals. As part of the agency’s Artemis campaign, instruments on VIPER will demonstrate U.S. industry’s ability to search for ice on the lunar surface and collect science data.
      The Announcement for Partnership Proposal contains proposal instructions and evaluation criteria for a new Lunar Volatiles Science Partnership. Responses are due Thursday, Feb. 20. After evaluating submissions, any selections by the agency will require respondents to submit a second, more detailed, proposal. NASA is expected to make a decision on the VIPER mission this summer.
      “Moving forward with a VIPER partnership offers NASA a unique opportunity to engage with the private sector,” said Nicky Fox, associate administrator in the Science Mission Directorate at NASA Headquarters in Washington. “Such a partnership provides the opportunity for NASA to collect VIPER science that could tell us more about water on the Moon, while advancing commercial lunar landing capabilities and resource prospecting possibilities.”
      This new announcement comes after NASA issued a Request for Information on Aug. 9, 2024, to seek interest from American companies and institutions in conducting a mission using the agency’s VIPER Moon rover after the program was canceled in July 2024.
      Any partnership would work under a Cooperative Research and Development Agreement. This type of partnership allows both NASA and an industry partner to contribute services, technology, and hardware to the collaboration.
      As part of an agreement, NASA would contribute the existing VIPER rover as-is. Potential partners would need to arrange for the integration and successful landing of the rover on the Moon, conduct a science/exploration campaign, and disseminate VIPER-generated science data. The partner may not disassemble the rover and use its instruments or parts separately from the VIPER mission. NASA’s selection approach will favor proposals that enable data from the mission’s science instruments to be shared openly with anyone who wishes to use it.
      “Being selected for the VIPER partnership would benefit any company interested in advancing their lunar landing and surface operations capabilities,” said Joel Kearns, deputy associate administrator for exploration in the Science Mission Directorate. “This solicitation seeks proposals that clearly describe what is needed to successfully land and operate the rover, and invites industry to propose their own complementary science goals and approaches. NASA is looking forward to partnering with U.S. industry to meet the challenges of performing volatiles science in the lunar environment.”
      The Moon is a cornerstone for solar system science and exoplanet studies. In addition to helping inform where ice exists on the Moon for potential future astronauts, understanding our nearest neighbor helps us understand how it has evolved and what processes shaped its surface. 
      To learn more about NASA’s lunar science, visit:
      https://www.nasa.gov/moon
      -end-
      Karen Fox
      Headquarters, Washington
      202-358-1100
      karen.fox@nasa.gov
      Share
      Details
      Last Updated Feb 03, 2025 Related Terms
      Missions VIPER (Volatiles Investigating Polar Exploration Rover) View the full article
    • By NASA
      As part of NASA’s CLPS (Commercial Lunar Payload Services) initiative and Artemis campaign, Intuitive Machines’ second delivery to the Moon will carry NASA technology demonstrations and science investigations on their Nova-C class lunar lander. Credit: Intuitive Machines NASA will host a media teleconference at 1 p.m. EST Friday, Feb. 7, to discuss the agency’s science and technology flying aboard Intuitive Machines’ second flight to the Moon. The mission is part of NASA’s CLPS (Commercial Lunar Payload Services) initiative and Artemis campaign to establish a long-term lunar presence. 

      Audio of the call will stream on the agency’s website at:
      https://www.nasa.gov/live
      Briefing participants include:
      Nicky Fox, associate administrator, Science Mission Directorate, NASA Headquarters Niki Werkheiser, director, technology maturation, Space Technology Mission Directorate, NASA Headquarters Trent Martin, senior vice president, space systems, Intuitive Machines To participate by telephone, media must RSVP no later than two hours before the briefing to: ksc-newsroom@mail.nasa.gov. NASA’s media accreditation policy is available online.

      Intuitive Machines’ lunar lander, Athena, will launch on a SpaceX Falcon 9 rocket from Launch Complex 39A at NASA’s Kennedy Space Center in Florida. The four-day launch window opens no earlier than Wednesday, Feb. 26.

      Among the items on Intuitive Machines’ lander, the IM-2 mission will be one of the first on site, or in-situ, demonstrations of resource utilization on the Moon. A drill and mass spectrometer will measure the potential presence of volatiles or gases from lunar soil in Mons Mouton, a lunar plateau near the Moon’s South Pole. In addition, a passive Laser Retroreflector Array on the top deck of the lander will bounce laser light back at any orbiting or incoming spacecraft to give future spacecraft a permanent reference point on the lunar surface. Other technology instruments on this delivery will demonstrate a robust surface communications system and deploy a propulsive drone that can hop across the lunar surface.

      Launching as a rideshare with the IM-2 delivery, NASA’s Lunar Trailblazer spacecraft also will begin its journey to lunar orbit, where it will map the distribution of the different forms of water on the Moon.

      Under the CLPS model, NASA is investing in commercial delivery services to the Moon to enable industry growth and support long-term lunar exploration. As a primary customer for CLPS deliveries, NASA is one of many customers for these flights.

      For updates, follow on:
      https://blogs.nasa.gov/artemis
      -end-
      Alise Fisher / Jasmine Hopkins
      Headquarters, Washington
      202-358-2546
      alise.m.fisher@nasa.gov / jasmine.s.hopkins@nasa.gov

      Natalia Riusech / Nilufar Ramji
      Johnson Space Center, Houston
      281-483-5111
      nataila.s.riusech@nasa.gov / nilufar.ramji@nasa.gov

      Antonia Jaramillo
      Kennedy Space Center, Florida
      321-867-2468
      antonia.jaramillobotero@nasa.gov
      Share
      Details
      Last Updated Jan 31, 2025 LocationNASA Headquarters Related Terms
      Commercial Lunar Payload Services (CLPS) Artemis Missions Science Mission Directorate Space Technology Mission Directorate View the full article
    • By NASA
      NASA/Bill Ingalls A NASA photographer captured the full “wolf” moon rising over the Lincoln Memorial and Memorial Bridge on Jan. 13, 2025.
      The Maine Farmers’ Almanac began publishing Native American names for full moons in the 1930s. Over time, these names have become widely known and used. According to this almanac, the full moon in January is called the Wolf Moon, from the packs of wolves heard howling outside the villages amid the cold and deep snows of winter.
      Get tips and guides on skywatching.
      Image credit: NASA/Bill Ingalls
      View the full article
    • By NASA
      5 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      A massive hotspot — larger the Earth’s Lake Superior — can be seen just to the right of Io’s south pole in this annotated image taken by the JIRAM infrared imager aboard NASA’s Juno on Dec. 27, 2024, during the spacecraft’s flyby of the Jovian moon. NASA/JPL-Caltech/SwRI/ASI/INAF/JIRAM Even by the standards of Io, the most volcanic celestial body in the solar system, recent events observed on the Jovian moon are extreme.
      Scientists with NASA’s Juno mission have discovered a volcanic hot spot in the southern hemisphere of Jupiter’s moon Io. The hot spot is not only larger than Earth’s Lake Superior, but it also belches out eruptions six times the total energy of all the world’s power plants. The discovery of this massive feature comes courtesy of Juno’s Jovian Infrared Auroral Mapper (JIRAM) instrument, contributed by the Italian Space Agency.
      “Juno had two really close flybys of Io during Juno’s extended mission,” said the mission’s principal investigator, Scott Bolton of the Southwest Research Institute in San Antonio. “And while each flyby provided data on the tormented moon that exceeded our expectations, the data from this latest — and more distant — flyby really blew our minds. This is the most powerful volcanic event ever recorded on the most volcanic world in our solar system — so that’s really saying something.”
      The source of Io’s torment: Jupiter. About the size of Earth’s Moon, Io is extremely close to the mammoth gas giant, and its elliptical orbit whips it around Jupiter once every 42.5 hours. As the distance varies, so does the planet’s gravitational pull, which leads to the moon being relentlessly squeezed. The result: immense energy from frictional heating that melts portions of Io’s interior, resulting in a seemingly endless series of lava plumes and ash venting into its atmosphere from the estimated 400 volcanoes that riddle its surface.
      Close Flybys
      Designed to capture the infrared light (which isn’t visible to the human eye) emerging from deep inside Jupiter, JIRAM probes the gas giant’s weather layer, peering 30 to 45 miles (50 to 70 kilometers) below its cloud tops. But since NASA extended Juno’s mission, the team has also used the instrument to study the moons Io, Europa, Ganymede, and Callisto.
      Images of Io captured in 2024 by the JunoCam imager aboard NASA’s Juno show signif-icant and visible surface changes (indicated by the arrows) near the Jovian moon’s south pole. These changes occurred between the 66th and 68th perijove, or the point during Juno’s orbit when it is closest to Jupiter.Image data: NASA/JPL-Caltech/SwRI/MSSS Image processing by Jason Perry During its extended mission, Juno’s trajectory passes by Io every other orbit, flying over the same part of the moon each time. Previously, the spacecraft made close flybys of Io in December 2023 and February 2024, getting within about 930 miles (1,500 kilometers) of its surface. The latest flyby took place on Dec. 27, 2024, bringing the spacecraft within about 46,200 miles (74,400 kilometers) of the moon, with the infrared instrument trained on Io’s southern hemisphere.
      Io Brings the Heat
      “JIRAM detected an event of extreme infrared radiance — a massive hot spot — in Io’s southern hemisphere so strong that it saturated our detector,” said Alessandro Mura, a Juno co-investigator from the National Institute for Astrophysics in Rome. “However, we have evidence what we detected is actually a few closely spaced hot spots that emitted at the same time, suggestive of a subsurface vast magma chamber system. The data supports that this is the most intense volcanic eruption ever recorded on Io.”
      The JIRAM science team estimates the as-yet-unnamed feature spans 40,000 square miles (100,000 square kilometers). The previous record holder was Io’s Loki Patera, a lava lake of about 7,700 square miles (20,000 square kilometers). The total power value of the new hot spot’s radiance measured well above 80 trillion watts.
      Picture This
      The feature was also captured by the mission’s JunoCam visible light camera. The team compared JunoCam images from the two previous Io flybys with those the instrument collected on Dec. 27. And while these most recent images are of lower resolution since Juno was farther away, the relative changes in surface coloring around the newly discovered hot spot were clear. Such changes in Io’s surface are known in the planetary science community to be associated with hot spots and volcanic activity.
      An eruption of this magnitude is likely to leave long-lived signatures. Other large eruptions on Io have created varied features, such as pyroclastic deposits (composed rock fragments spewed out by a volcano), small lava flows that may be fed by fissures, and volcanic-plume deposits rich in sulfur and sulfur dioxide.
      Juno will use an upcoming, more distant flyby of Io on March 3 to look at the hot spot again and search for changes in the landscape. Earth-based observations of this region of the moon may also be possible.  
      “While it is always great to witness events that rewrite the record books, this new hot spot can potentially do much more,” said Bolton. “The intriguing feature could improve our understanding of volcanism not only on Io but on other worlds as well.”
      More About Juno
      NASA’s Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Juno mission for the principal investigator, Scott Bolton, of the Southwest Research Institute in San Antonio. Juno is part of NASA’s New Frontiers Program, which is managed at NASA’s Marshall Space Flight Center in Huntsville, Alabama, for the agency’s Science Mission Directorate in Washington. The Italian Space Agency (ASI) funded the Jovian InfraRed Auroral Mapper. Lockheed Martin Space in Denver built and operates the spacecraft. Various other institutions around the U.S. provided several of the other scientific instruments on Juno.
      More information about Juno is available at:
      https://www.nasa.gov/juno
      News Media Contacts
      DC Agle
      Jet Propulsion Laboratory, Pasadena, Calif.
      818-393-9011
      agle@jpl.nasa.gov
      Karen Fox / Alana Johnson
      NASA Headquarters, Washington
      202-358-1600 / 202-358-1501
      karen.c.fox@nasa.gov / alana.r.johnson@nasa.gov
      Deb Schmid
      Southwest Research Institute, San Antonio
      210-522-2254
      dschmid@swri.org
      2025-010      
      Share
      Details
      Last Updated Jan 28, 2025 Related Terms
      Juno Jet Propulsion Laboratory Jupiter Jupiter Moons The Solar System Explore More
      4 min read NASA Space Tech’s Favorite Place to Travel in 2025: The Moon!
      Article 4 days ago 5 min read NASA JPL Prepping for Full Year of Launches, Mission Milestones
      Article 5 days ago 5 min read Study Finds Earth’s Small Asteroid Visitor Likely Chunk of Moon Rock
      Article 6 days ago Keep Exploring Discover Related Topics
      Missions
      Humans in Space
      Climate Change
      Solar System
      View the full article
  • Check out these Videos

×
×
  • Create New...