Simon Carn | Lightnews

Prof. Simon Carn

@simoncarn.bsky.social

1.3K followers 350 following 1.5K posts

Volcanologist @michigantech.bsky.social. Satellite-powered analysis of global #volcanic activity. #GreatLakes silent sports 🏃🏻‍♂️🚵🏻‍♂️⛷. Often buried in snow. 🇬🇧/🇺🇸

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Environmental science 44%

Geology 23%

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Reposted by Tim Wright

Prof. Simon Carn @simoncarn.bsky.social · 16h

Pre- and post-eruption visible imagery of #HayliGubbi from #Sentinel-2, showing tephra deposits and 2 new craters. The latter could be eruption vents and/or formed by post-eruptive subsidence. Looks like the pre-existing crater was enlarged by the eruption. @esa.int

Prof. Simon Carn @simoncarn.bsky.social · 1d

And the #HayliGubbi ash deposit has already been sampled to the north of the volcano by @derekkeir.bsky.social. Could provide some insight into the eruption process.
bsky.app/profile/dere...

derekkeir.bsky.social @derekkeir.bsky.social · 1d

The Hayli Gubbi tephra has been sampled. These are photos from my sampling expedition on 24 Nov with the University of Semera from around 10 km north of Hayli Gubbi @sorcerinsar.bsky.social @alarosa.bsky.social

Reposted by Simon Carn, David Pyle, Tim Wright , and 1 more Simon Carn, David Pyle, Tim Wright, Jenni Barclay

derekkeir.bsky.social @derekkeir.bsky.social · 1d

Reposted by Tim Wright

Prof. Simon Carn @simoncarn.bsky.social · 1d

Some nice commentary on the #HayliGubbi #eruption here from @julietbiggs.bsky.social and others. As discussed, it's unlikely that this is actually the first eruption of the volcano in 12,000 years. The Afar region is very active but also remote and understudied.

bsky.app/profile/scia...

Scientific American @sciam.bsky.social · 1d

The Hayli Gubbi volcano, long thought to be dormant, sent ash nine miles into the sky in an eruption on Sunday

Volcano Erupts After Lying Dormant for 12,000 Years, Sending Scientists Scrambling

The Hayli Gubbi volcano, long thought to be dormant, sent ash nine miles into the sky in an eruption on Sunday

www.scientificamerican.com

Reposted by Simon Carn

Scientific American @sciam.bsky.social · 1d

The Hayli Gubbi volcano, long thought to be dormant, sent ash nine miles into the sky in an eruption on Sunday

Volcano Erupts After Lying Dormant for 12,000 Years, Sending Scientists Scrambling

The Hayli Gubbi volcano, long thought to be dormant, sent ash nine miles into the sky in an eruption on Sunday

www.scientificamerican.com

Reposted by Tim Wright

Prof. Simon Carn @simoncarn.bsky.social · 1d

Thanks Tim. @planet.com imagery from Nov 24 show some subsidence in the southern half of the Erta Ale caldera after the #HayliGubbi eruption (plus widespread ash deposits).

Prof. Simon Carn @simoncarn.bsky.social · 1d

New #TROPOMI data on Nov 24 show higher total SO₂ emissions from #HayliGubbi (~0.2 Tg SO₂). Measurements on Nov 23 were likely impacted by the dense volcanic ash plume. Most of the SO₂ is spreading rapidly east in the subtropical jet stream, over the Arabian Sea towards NW India and Pakistan.

Satellite image of sulfur dioxide (SO₂) column amounts in the atmosphere on November 24, after an eruption of Hayli Gubbi volcano in Ethiopia on November 23. SO₂ columns are depicted using a rainbow color scale ranging from white (low or zero SO₂) to red (high SO₂).

Prof. Simon Carn @simoncarn.bsky.social · 2d

Sentinel-5P #TROPOMI measurements at ~11:00 UTC show most of the SO₂ emissions from #HayliGubbi spreading east in the upper troposphere. Plume contains ~44 kilotons of SO₂ (~0.04 Tg).

Reposted by David Pyle, Martin Tomko, Rebecca Williams

Prof. Simon Carn @simoncarn.bsky.social · 2d

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.

Prof. Simon Carn @simoncarn.bsky.social · 6d

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...

Prof. Simon Carn @simoncarn.bsky.social · Jul 18

Satellite measurements on July 18 show continued SO₂ emissions from the erupting fissure in #Iceland and dispersion of SO₂ over #Greenland and the #Arctic Ocean.

Prof. Simon Carn @simoncarn.bsky.social · Jul 18

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

Prof. Simon Carn @simoncarn.bsky.social · Jul 8

Thanks Fred. Impressive plume but low SO₂ loading (~6 kt or 0.006 Tg); an order of magnitude lower than the June 17 eruption of #Lewotobi.

Map of column amounts of sulfur dioxide (SO2) gas in the Lewotobi volcanic plume, measured by the Sentinel-5P/TROPOMI satellite instrument. The map shows SO2 spreading west of the volcano in the upper troposphere.

Reposted by Simon Carn

Casey Dreier @caseydreier.bsky.social · May 1

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

Prof. Simon Carn @simoncarn.bsky.social · Apr 29

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

Prof. Simon Carn @simoncarn.bsky.social · Mar 21

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 🧪🌋

Reposted by Simon Carn

Santiago Gassó @sangasso.bsky.social · Mar 17

🧪🛰️

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...

Swirling Skies and Melting Icebergs

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

earthobservatory.nasa.gov

Prof. Simon Carn @simoncarn.bsky.social · Mar 12

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.

Reposted by Simon Carn, Thomas Wahl, Flavio Lehner , and 2 more Simon Carn, Thomas Wahl, Flavio Lehner, Ramesh Laungani, Luca L. Morreale

Dr. Jennifer Wade @volcanojw.bsky.social · Feb 8

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.

Reposted by Simon Carn

Dr. Jessica Ball 🍪 @tuffcookie.bsky.social · Feb 1

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. 🌋🧪⚒️

Volcano Notification Service (VNS)

volcanoes.usgs.gov

Prof. Simon Carn @simoncarn.bsky.social · Jan 20

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 🧪

Prof. Simon Carn @simoncarn.bsky.social · Nov 19

#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.

Reposted by Simon Carn

Julie Elliott @julieelliott.bsky.social · Nov 15

#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.

Reposted by Simon Carn

Scott St. George @scottstgeorge.paleohydrology.com · Nov 12

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...

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.

www.nature.com

Prof. Simon Carn @simoncarn.bsky.social · Nov 16

Evolution of colors in tonight’s #aurora over Hancock, #Michigan. @Upper Peninsula @NWSMarquette @TamithaSkov #northernlights #geomagneticstorm

Prof. Simon Carn @simoncarn.bsky.social · Oct 8

Overhead #aurora in Hancock, #Michigan tonight. #Auroraborealis #northernlights

Prof. Simon Carn @simoncarn.bsky.social · Nov 16

Satellite data from @CopernicusEU #Sentinel5P #TROPOMI show a band of #volcanic SO₂ advancing over the NW #UK and #Ireland on Aug 24, behind a cold front. Observations of SO₂ over Europe are set to improve (-> hourly) with the upcoming launch of the #geostationary #Sentinel4.

Prof. Simon Carn @simoncarn.bsky.social · Nov 16

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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