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Prof. Simon Carn @simoncarn.bsky.social · 05/09/2026

Large #eruption of #Krakatau #volcano (#Indonesia) started at ~16:30 UTC on Sept 4, and is continuing as of 13:00 UTC on Sept 5. #NOAA-20 OMPS satellite data showing injection of ~0.2 Tg SO₂ into the upper troposphere by 06:50 UTC on Sep 5.

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Prof. Simon Carn @simoncarn.bsky.social · 12/05/2026

New submarine #volcanic #eruption in the Central Bismarck Sea (Papua New Guinea) at ~3ºS, 148ºE. Previous activity reported in this region in 1972. Plume breached ocean surface on May 9 at ~01:00 UTC; w/ small pumice raft. Animation shows MODIS/VIIRS imagery & thermal IR hotspots from May 9-12.

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Prof. Simon Carn @simoncarn.bsky.social · 15/01/2026

Four years since #Hunga #volcano (Tonga) unleashed one of the most explosive volcanic #eruptions ever observed, providing a new paradigm of submarine volcanism. Read all about the atmospheric impacts of the 2022 Hunga eruption in a new open-access report: juser.fz-juelich.de/record/1049154

Cover page of the Hunga Atmospheric Impacts report, showing satellite images of the eruption plume.

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Prof. Simon Carn @simoncarn.bsky.social · 06/12/2025

The final ~25 seconds of footage from the V3 webcam at #Kilauea #volcano, during Episode 38 of lava fountain activity. Courtesy of USGS. USGS feed: www.youtube.com/watch?v=Bqmp...

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Prof. Simon Carn @simoncarn.bsky.social · 23/11/2025

An explosive #eruption of Hayli Gubbi #volcano, located SE of Erta'Ale in the Afar Rift (Ethiopia), began at ~08:30 UTC on Nov 23. Eruption onset was fortuitously captured by a @planet.com overpass at 08:31 UTC. Hayli Gubbi has no record of Holocene eruptions. Toulouse VAAC reporting ash to ~15 km.

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Prof. Simon Carn @simoncarn.bsky.social · 19/11/2025

Some stunning footage of ongoing pyroclastic flow activity at Semeru #volcano (Java, Indonesia). Screen capture shows a lightning strike at ~16:07 UTC. www.youtube.com/watch?v=Txgr...

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Prof. Simon Carn @simoncarn.bsky.social · 18/07/2025

Dispersion of #volcanic SO₂ from the latest #eruption on #Iceland's #Reykjanes peninsula (July 16), measured by the Sentinel-5P TROPOMI satellite instrument. SO₂ emissions have spread into north and west Iceland, impacting air quality (Icelandic Met Office). @esa.int

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Reposted by Prof. Simon Carn

Casey Dreier @caseydreier.bsky.social · 01/05/2025

Today, we're launching a dedicated action hub for the crisis threatening NASA science. Find actions, latest news and up-to-date resources at: www.planetary.org/save-nasa-sc... #ProtectNASAScience

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Prof. Simon Carn @simoncarn.bsky.social · 29/04/2025

Satellite imagery of nighttime lights using the NOAA-20/VIIRS Day/Night Band ('visible image at night') shows areas of Spain and Portugal still affected by power outages overnight on April 28-29. Images from NASA Worldview. @thenasaearth.bsky.social @noaa.gov

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Prof. Simon Carn @simoncarn.bsky.social · 21/03/2025

The world's youngest mountain glacier - Crater Glacier at Mount St. Helens #volcano (WA, USA) - formed in 1996 in the amphitheater produced by the May 1980 eruption. The glacier flows around lava domes erupted in 1980-86 and 2004-08. Photos taken in 2023. #WorldGlacierDay 🧪🌋

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Reposted by Prof. Simon Carn

Santiago Gassó @sangasso.bsky.social · 17/03/2025

🧪🛰️ My colleague @simoncarn.bsky.social and I were consulted for this note by @avoiland.bsky.social to comment on volcanoes and clouds in the South Atlantic. A nice place to study aerosol-cloud interactions! (and other things of course) earthobservatory.nasa.gov/images/15404...

earthobservatory.nasa.gov

Swirling Skies and Melting Icebergs

The remote South Sandwich Islands can disrupt passing clouds in ways that shed alternating rows of cloud spirals.

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Prof. Simon Carn @simoncarn.bsky.social · 12/03/2025

When Spurr last erupted in 1992, volcanic ash & gas clouds (a potential aviation hazard) drifted south over the Pacific NW & Upper Midwest. A fully functional USGS & NOAA is needed to monitor such events & mitigate their impacts. NASA/NOAA satellite data also critical for tracking volcanic clouds.

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Reposted by Prof. Simon Carn

Dr. Jennifer Wade @volcanojw.bsky.social · 08/02/2025

Some folks have asked, given recent news, “how do I show my friends/family the impact of NSF?” We have some easy Fact Sheets for you! Here’s a brief thread about this website: new.nsf.gov/about/fact-s... which hosts a ton of useful one-pagers.

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Reposted by Prof. Simon Carn

Dr. Jessica Ball 🍪 @tuffcookie.bsky.social · 01/02/2025

A reminder: If you need to know about volcanic activity in the United States and are concerned that you might not be able to reach USGS websites at some point, PLEASE make sure you sign up for our volcano notification Service: volcanoes.usgs.gov/vns3/ It is a straight-to-email messaging system. 🌋🧪⚒️

volcanoes.usgs.gov

Volcano Notification Service (VNS)

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Prof. Simon Carn @simoncarn.bsky.social · 20/01/2025

Satellite imagery from @planet.com shows increased steaming in the summit caldera of Fentale volcano (Ethiopia) in the last week. Emissions appear confined to topographic lows - perhaps a meteorological effect (temperature inversion?). @davidmpyle.bsky.social @volckaren.bsky.social 🧪

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Prof. Simon Carn @simoncarn.bsky.social · 19/11/2024

#Volcanic SO₂ plume from #Kanlaon #volcano captured and entrained by Super Typhoon #Man-yi (#Pepito) during its passage through the #Philippines. Data from the #geostationary GK-2B GEMS instrument.

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Reposted by Prof. Simon Carn

Julie Elliott @julieelliott.bsky.social · 15/11/2024

#30DayMapChallenge Day 14: World Map Large explosive volcanic eruptions during the Holocene plotted by VEI (Volcano Explosivity Index). Volcano data from SI Global Volcanism Program.

Map of the world with circles of various sizes in shades of red, orange, and yellow. The circle size and color corresponds to size of explosive volcanic eruption that took place. There are far more smaller circles than very large circles, indicating that very large eruptions are (thankfully) less common.

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Reposted by Prof. Simon Carn

Scott St. George @scottstgeorge.paleohydrology.com · 12/11/2024

No insurer will write a policy for global cooling triggered by a massive 🌋eruption. But we shouldn't ignore a risk just because it's uninsurable. In this comment led by Markus Stoffel, we argue the risk industry ought to think more seriously about 'Tambora 2.0'. www.nature.com/articles/d41...

nature.com

The next massive volcano eruption will cause climate chaos — and we are unprepared

Volcanic activity will be experienced differently in a warmer world. Researchers need to understand these risks and how they could spiral.

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Prof. Simon Carn @simoncarn.bsky.social · 24/08/2024

Another batch of #volcanic SO₂ en route to the #UK/#Ireland, courtesy of the latest #eruption on #Iceland's #Reykjanes peninsula. Might cause some local #AirQuality impacts in the coming days. @eddy_weather @ScottishEPA SO₂ data: @NOAA/@NASA @JPSSProgram #NOAA20-#OMPS

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Prof. Simon Carn @simoncarn.bsky.social · 04/06/2024

The first #lava flows since 1974 on #Kīlauea's Southwest rift zone, imaged by @planet on June 3 at 20:09 UTC (10:09 HST), shortly before the #eruption paused. #Hawaii @USGSVolcanoes @USGS @Volcanoes_NPS

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Prof. Simon Carn @simoncarn.bsky.social · 04/06/2024

The largest #eruption on record of #Kanlaon/#Canlaon #volcano (#Philippines) on June 3 produced an upper tropospheric SO₂ cloud (~0.05 Tg SO₂), seen here from #geostationary orbit by #SouthKorea's UV #GK2B #GEMS sensor. @phivolcs_dost @News5PH @nababaha

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Prof. Simon Carn @simoncarn.bsky.social · 29/05/2024

First #Sentinel5P #TROPOMI overpass ~1.3 hours after the onset of today's #eruption on #Iceland's #Reykjanes peninsula shows very high SO₂ column amounts in plume spreading SE. Est. SO₂ emission rate is ~1400 kg/s (~120,000 tons/day). @Vedurstofan @CopernicusEU @rockhardIES

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Prof. Simon Carn @simoncarn.bsky.social · 17/04/2024

SO₂ emissions from the April 16 #eruption of #Ruang #volcano (#Indonesia) measured with hourly cadence by #SouthKorea's #geostationary UV GK-2B #GEMS sensor. Relatively low SO₂ amounts detected so far. @PVMBG_ @id_magma @andrewcraigtupp

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Prof. Simon Carn @simoncarn.bsky.social · 17/03/2024

The latest #eruption in #Iceland has produced the largest #volcanic SO₂ cloud measured to date in the 2023-24 #Reykjanes Fires, consistent with reports that it is the most intense episode so far. Data: @CopernicusEU #Sentinel5P #TROPOMI. @Vedurstofan @rockhardIES @Alberto_Carac

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Prof. Simon Carn @simoncarn.bsky.social · 19/02/2024

.⁦@mtugeomining⁩’s Rudiger Escobar-Wolf discussing #volcanic risk reduction in #Guatemala at the closing ceremony of the ⁦@COVolcanoes12⁩ meeting in #Antigua. Many thanks to the organizers for a fantastic conference. ⁦@michigantech⁩ ⁦@mturesearch⁩ #CoV12

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Prof. Simon Carn @simoncarn.bsky.social · 08/02/2024

As sunlight gradually returns to high northern latitudes, so does UV satellite monitoring of #volcanic SO₂ emissions from #Iceland. #Sentinel5P #TROPOMI detected SO₂ from today's #eruption on the #Reykjanes peninsula drifting over the N. Atlantic.

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Prof. Simon Carn @simoncarn.bsky.social · 08/02/2024

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Prof. Simon Carn @simoncarn.bsky.social · 03/02/2024

Graphics artist Charley Harper's striking poster for @Volcanoes_NPS, depicting #lava flowing around a kīpuka in his distinctive 'minimal realism' style. #Hawaii #volcano www.charleyharperartstudio.com/artw…

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Prof. Simon Carn @simoncarn.bsky.social · 18/12/2023

An #eruption has started on #Iceland's #Reykjanes peninsula (north of #Grindavik) with some impressive lava fountains. Follow @Vedurstofan for official updates. Webcams: www.youtube.com/watch?v=VIs83vmfZCk www.youtube.com/watch?v=804nPrAUAxg

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Prof. Simon Carn @simoncarn.bsky.social · 04/12/2023

The #SouthKorean geostationary #UV #GK2B #GEMS sensor did not detect any significant increase in SO₂ emissions at #Marapi #volcano (#Sumatra) up to ~2 hours prior to its Dec 3/08:00 UTC #eruption. On Dec 4, SO₂ is observed dispersing in multiple directions. @PVMBG_ @id_magma

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Prof. Simon Carn @simoncarn.bsky.social · 25/11/2023

#SouthKorea's geostationary #GK2B #GEMS instrument is tracking some of the SO₂ emitted by the Nov 20-21 #Ulawun #eruption as it disperses over the Western Pacific. #Volcanic degassing from #Dukono (#Indonesia) and #Philippine #volcanoes also visible. @andrewcraigtupp @airesEO

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Prof. Simon Carn @simoncarn.bsky.social · 20/11/2023

Ongoing #eruption of #Ulawun #volcano (#PapuaNewGuinea) clearly detected amid tropical convection by the @JMA_kishou #Himawari8 SO₂ RGB product (yellow/orange = upper-level SO₂). Emissions continuing as of 15:40 UTC/Nov 20. Largest Ulawun eruption since 2019. Credit: @CIRA_CSU

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Prof. Simon Carn @simoncarn.bsky.social · 02/11/2023

An #eruption of #Klyuchevskoy (#Kamchatka, #Russia), Eurasia's highest active #volcano, has spread SO₂ & ash over the North Pacific. #Sentinel5P #TROPOMI detects ~0.1 Tg SO₂ on Nov 2; Klyuchevskoy's largest eruption since 1994 but well below the threshold for #climate impacts.

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Prof. Simon Carn @simoncarn.bsky.social · 25/09/2023

The @michigantech @mtugeomining department is seeking applications for a tenure-track faculty position in geological, mining or civil engineering. Research areas of interest include #geohazards and #DataScience. Apply here (by Nov 15):...

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Prof. Simon Carn @simoncarn.bsky.social · 15/07/2023

Another explosive #eruption at #Bagana (#PapuaNewGuinea) on July 14 at ~21:50 UTC, detected as a #volcanic Cb by the @NOAA/@UWCIMSS VOLCAT system. A similar event, unusual for this #volcano, occurred on July 7. @BrendanVolc @andrewcraigtupp @Eruptn

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Prof. Simon Carn @simoncarn.bsky.social · 11/07/2023

First look at @CopernicusEU #Sentinel5P #TROPOMI satellite SO₂ data for the #eruption at Litli-Hrútur on #Iceland's #Reykjanes peninsula, showing the #volcanic gas plume drifting SW off the coast and out over the North Atlantic. @Vedurstofan @EIlyinskaya @gislio

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Prof. Simon Carn @simoncarn.bsky.social · 14/06/2023

How has the 2022 Hunga Tonga #volcanic #eruption impacted Earth's atmosphere & #climate? Our Fall #AGU23 session on the eruption is now open for submissions, and will discuss the latest research on this topic. Abstract deadline: Aug 2. @theAGU...

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Prof. Simon Carn @simoncarn.bsky.social · 11/04/2023

Large #eruption of #Shiveluch (#Шивелуч, #Kamchatka) w/ stratospheric plume, starting at ~12:00 UT on April 10 with paroxysmal phase at ~17:00 UT. #Sentinel5P #TROPOMI measures ~0.2 Tg SO₂ in the #volcanic cloud. Looks like the largest Shiveluch eruption of the satellite era.

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Prof. Simon Carn @simoncarn.bsky.social · 09/04/2023

On April 7 at ~05:40 UT, a powerful #eruption of #Bezymianny ejected #volcanic ash that drifted rapidly east in the jet stream as nightfall approached #Kamchatka. #Himawari GeoColor/Fire Temperature (@CIRA_CSU) shows hot spots at Bezymianny & #Sheveluch to the north. @JMA_kishou

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Prof. Simon Carn @simoncarn.bsky.social · 03/04/2023

#Postdoc position available @michigantech to work on multi-decadal records of #volcanic SO₂ emissions using #satellite data. @NASA-funded, in collaboration with @NASAGoddard & @environmentca. Happy to discuss remote work options. More info & application:...

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Prof. Simon Carn @simoncarn.bsky.social · 03/02/2023

Kudos to the @iavcei2023 team for providing an excellent virtual meeting platform, which I think has really raised the bar for hybrid conferences. I hope future @IAVCEI_official meetings will follow suit. #iavcei2023

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Prof. Simon Carn @simoncarn.bsky.social · 15/12/2022

Great to see the new #geostationary UV #GK2B #GEMS hourly SO₂ data presented at #AGU22. This animation shows SO₂ degassing at #Taal #volcano (#Philippines) detected by GEMS in October 2022. Potential game-changer for volcanic gas monitoring in E. Asia. @phivolcs_dost @nababaha

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Prof. Simon Carn @simoncarn.bsky.social · 13/12/2022

Looking forward to our #AGU22 sessions on the January 2022 #eruption of the submarine Hunga Tonga - Hunga Ha'apai #volcano. A new paradigm for #volcano-atmosphere interactions. #AGU2022 @theAGU @KristenFauria @AGUvgp

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Prof. Simon Carn @simoncarn.bsky.social · 07/12/2022

Exciting to see the release of SO₂ data from #SouthKorea's #GEMS - the first geostationary UV sensor, to be followed in 2023-24 by @NASA's @TEMPO_Mission & @esa's #Sentinel4. On Dec 6-7, GEMS caught some #MaunaLoa SO₂ drifting over China & Japan on its journey around the world.

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Prof. Simon Carn @simoncarn.bsky.social · 06/12/2022

The #EPIC instrument on @NASA/@NOAA's #DSCOVR spacecraft (1 million miles from Earth) has pioneered high-cadence UV observations of #volcanic SO₂ emissions from space. EPIC captured emissions from the #MaunaLoa #eruption on Nov 28-29, which injected SO₂ to a range of altitudes.

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Prof. Simon Carn @simoncarn.bsky.social · 05/12/2022

The U.S. @USMNT is out of #WorldCup2022, and as a parting gesture we've sent some American #volcanic gas. This #Sentinel5 #TROPOMI image shows SO₂ emitted at the start of the #MaunaLoa #eruption, and transported in the sub-tropical jet stream, approaching #Qatar on December 5.

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