Prof. Simon Carn

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

[Prof. Simon Carn @simoncarn]

Another major #eruption of #Ruang. Geostationary UV #GK2B GEMS data nicely capture the spreading #volcanic SO₂ cloud, including the #stratospheric overshoot drifting rapidly westwards. The SO₂ mass (~0.3 Tg) is very preliminary and needs confirmation from other sensors.

[Prof. Simon Carn @simoncarn]

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

[Prof. Simon Carn @simoncarn]

@volcanessa @UpperPeninsula @TamithaSkov Thanks Sally! Definitely one of the best displays I've seen up here.

[Prof. Simon Carn @simoncarn]

Overhead #aurora in Hancock, #Michigan tonight. #Auroraborealis #northernlights @UpperPeninsula @TamithaSkov

[Prof. Simon Carn @simoncarn]

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]

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

[Prof. Simon Carn @simoncarn]

@eddy_weather @highlandweather That's right, there's no chance that the Icelandic SO₂ emissions are impacting recent Scottish weather. Magnitude and altitude both far too low.

[Prof. Simon Carn @simoncarn]

Longer sequence of hourly #GEMS data (daytime only) showing SO₂ emissions from the June 3 #Kanlaon #eruption. On June 5, the upper tropospheric SO₂ cloud was moving west over #SriLanka and S. #India, whilst SO₂ at lower altitudes is dispersing over the southern #Philippines.

[Prof. Simon Carn @simoncarn]

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

[Prof. Simon Carn @simoncarn]

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

[Prof. Simon Carn @simoncarn]

@HubGeology @phivolcs_dost @News5PH @nababaha I think this is the first #Kanlaon eruption in the satellite era to produce a significant amount of SO₂ (more than a few kilotons). The November 2023 #Ulawun eruption emitted ~0.1 Tg SO₂.

[Prof. Simon Carn @simoncarn]

@JimWindweather @phivolcs_dost @News5PH @nababaha I think ~8-17 km - highest (near the tropopause) in the west.

[Prof. Simon Carn @simoncarn]

June 1 update: #volcanic SO₂ from #Iceland has drifted south over SW #Wales & #Cornwall, producing an obvious band of #aerosol haze in #NOAA20 #VIIRS imagery. @ThePurpleAir sensors still showing #AirQuality impacts that could be perceptible to sensitive groups. @BBCCornwall

[Prof. Simon Carn @simoncarn]

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

[Prof. Simon Carn @simoncarn]

Photos of #volcanic haze (#vog) impacting visibility in the Outer #Hebrides during transit of the #volcanic SO₂ cloud. Courtesy of @eddy_weather
https://t.co/c1OiJoaut0

[Eddy Graham ("eddy weather") @eddywx.bsky.social @eddy_weather]

Some fotos of the volcanic haze across #Hebrides yest eve [courtesy HaMa Goede]. Visibility dropped suddenly from 50-75km to 3-6km with 2h, blue sky went brown, but cleared again later. SO2 values sky-rocketed!

[Prof. Simon Carn @simoncarn]

@eddy_weather @ThePurpleAir @DefraGovUK Many thanks Eddy - great to have some observations from the ground. The SO₂ amounts were quite impressive, but luckily this was a relatively short-lived episode.

[Prof. Simon Carn @simoncarn]

@joelgombiner @Vedurstofan @CopernicusEU @rockhardIES About 3.5 km according to @Vedurstofan.

[Prof. Simon Carn @simoncarn]

@Weather_West @GOESguy Satellite observations are somewhat variable but suggest a total of ~0.6-1.5 Tg SO₂ emitted by the two #eruptions. Even at the high end, this is below the ~5 Tg threshold for measurable #climate impacts.

[Prof. Simon Carn @simoncarn]

Another major #eruption of #Ruang. Geostationary UV #GK2B GEMS data nicely capture the spreading #volcanic SO₂ cloud, including the #stratospheric overshoot drifting rapidly westwards. The SO₂ mass (~0.3 Tg) is very preliminary and needs confirmation from other sensors.