Discover and read the best of Twitter Threads about #volcano

Most recents (24)

The eruption is over but the ground is still shaking - there have been dozens of #earthquakes around the #HungaTonga #volcano (magnitude 4.5-5), continuing today. 1/3

#GoogleEarth #Tonga #earthquake
Many are likely due to slip on existing faults or fracturing of new ones due to changes in crustal stress caused by the eruption. Others may be linked to magma movement, although that usually produces a more persistent signal called #volcanictremor. 2/3

volcano.oregonstate.edu/volcano-sounds…
I haven't seen any focal mechanisms for these events, which would tell us more about the type of #earthquake - it may be difficult to extract that information as these events are M5 or less, and seismic networks are sparse in this region. 3/3
Read 3 tweets
Kanokupolu #Tonga taken yesterday, 1/16/22 via Airbus SPOT #satellite. Post volcano/tsunami. High resolution image, this looks to me to be ashfall.
#Tonga taken by Airbus SPOT on 1/16/22. This is (was?) Ha'atafu Beach and Haatafu Beach Resort, but it seems to me that there are structures missing on this side (the resort appears to me to be missing, or extremely covered with ash). Possible tsunami scouring on the beach.
Reference image in Google vs. this acquisition -- you can see the big building on the top right in both images, but none of the structures you'd expect at Ha'atafu Beach, Nuku'alofa itself. #tonga #tsunami #volcano
Read 11 tweets
Tonga Navy appears to have just reached the island of #Nomuka
This ship (the only one transmitting satellite AIS data) came from Nuku'afola this morning, when officials said they would be sending the Tonga Navy to the outer islands.
Found this video I had missed earlier from this location (FB Live... shot just as the seas were retreating. Hope this person made it up a hill, what was coming as likely worse)
Read 8 tweets
Hunga-Tonga-Hunga-Ha'apai #volcano before/after the eruption. Sentinel-1 satellite (-20.48838, -175.28037)
Hunga-Tonga-Hunga-Ha'apai #volcano on the left, you can see the interference patterns on the waves from the tsunami impacts (another volcano on the right). The gob of stuff in the middle was not there before, maybe floating tephra or something else radar reflective.
No tracking details on these ships (premium satellite data) but there are a few fishing boats that got one heck of a wakeup call earlier. There's a few that were VERY close to the volcano. (60 miles away on open ocean).
Read 10 tweets
A #volcano just erupted near #Tonga - but why was it there in the first place?

Tonga sits on top of the #TongaKermadec #subductionzone, where the #PacificPlate sinks below the #AustralianPlate.

The subducting #PacificPlate carries the culprit into the mantle: #water. 🧵1/3 Source: https://source.wust...
Some people think that volcanoes at subduction zones are due to frictional heating from the two plates rubbing against each other - NO!

In this case, melting is because of the addition of water, sort of like how adding salt can make ice melt. 2/3

Is this the only volcano in the region? Absolutely not. Volcanoes parallel the plate boundary, a string of conical mountains 2000 m high, occasionally poking above the sea. Usually quiet, but built over millions of years through thousands of eruptions. 3/3

#tectoplot Image
Read 3 tweets
Timelapse of Hunga Tonga #volcano eruption on Jan 15 2022. Created using the #streamlit web app 👇

App: streamlit.gishub.org
Location: 20.536°S 175.382°W
Time: 03:00-07:00 UTC
Satellite: GOES-17 CMI Full Disk

#EarthEngine #geemap #eochat #gischat #dataviz
Night view
A closer look
Read 6 tweets
A major volcanic eruption resulted in a #tsunami offshore #Tonga, reports from there are scarce, but I tried to estimate the tsunami pattern due to the potential dome collapse of Hunga Tonga-Hunga Haʻapai #volcano
The simulation estimates the tsunami triggering via a sliding mass of up to 2 km³ volume. It might be an overestimation, but data is still coming in.
First eye witness reports/videos from Tonga already indicate major inundation for #Tonga Image
We have reports of waves +/- 0.5 - 1.5m from Samoa, Fiji, New Caledonia, Norfolk Island, even Australia and many more places.

Currently working on a simulation for the farfield effects. But calculation takes a while.
Read 7 tweets
Incredible satellite footage of the volcanic eruption in #Tonga ..

#Tsunami alert going on currently as well and footage showing it’s already started hitting some islands.. crazy🤯

Mother Nature is undefeated 🌊💨
Praying for everyone being affected by this..

Cannot imagine seeing this with my own eyes.

*not my footage*
#Volcano #Tonga #HungaTonga #HungaTongaHungaHaapai #underwater #Tsunami #Tonga #Oceania #MotherNature
Read 30 tweets
Around 3,500 residents of #LaPalma have been told they can leave their homes after authorities ended a lockdown caused when lava engulfed a cement plant

Since eruption,torrents of molten rock have destroyed more than 1,100 buildings,the #CanaryIslands Volcanic Institute said
#Lava from the eruption that began on 19 Sept has laid waste to a total area of nearly 600 hectares, according to Mr Morcuende.

After the #Volcano's cone partially collapsed on Saturday, a new river of lava streamed towards the sea, devouring banana & avocado farms
#LaPalma
#LaPalma's airport remained open but 11 flights were cancelled on Tuesday & others were delayed, airport operator #AENA said.

Meanwhile, there were 64 seismic movements on Tuesday, the strongest measuring 4.1, according to the Spanish National Geological Institute
#CanaryIslands
Read 5 tweets
Terrible Eruption #LaPalma Hot Lava flows into Residents' Homes & Thousands on the Beach of Fear

The effects of the eruption at #CumbreVieja volcano are being felt from above & below
#Tremors #Earthquakes
➡️ via @YouTube
#Canaryisland #Volcano #Spain
The plume of #VolcanicAsh rising from the summit has become persistent & occasionally more explosive.

@NaqNab: Today's Video of #CumbreVieja #Volcano #LaPalma, #CanaryIslands

Notice the massive amount of Volcanic Ash at ground⤵️
As the Cumbre Vieja volcano continued to erupt after 2 weeks, flights were canceled due to an ash cloud in La Palma.

#CumbreVieja #LaPalma #CanaryIslands #Volcano #Spain
📹@PalmaCorrupcion
Read 4 tweets
🌋A wonderful illustration that will now need some updating

🌋Recent #volcanic eruptions on #LaPalma (until 19 September 2021)

🌋Photo: Sergio Socorro, image: J.C. Carracedo et al.

#CumbreVieja #LaPalmaEruption #lapalmavolcano #geohazards #LaPalmaIslaBonita Image
🌌👨‍🚀 The #LaPalmaVolcano eruption as seen by @esa astronaut @Thom_astro from the International Space Station

#CumbreVieja #volcano #LaPalma #Canarias

Image
Read 4 tweets
If this were true, don't u think it would be a much bigger story? 🤔
Still, worth a share... Just in case.

EAST COAST PAY ATTENTION #VOLCANO 🌋🌋🌋🌋Locals on LaPalma have uploaded a photograph which they say shows "Detachment."   Part of the land which is FEARED to slide into
the Atlantic Ocean and cause a Tsunami to the east coast of the United States, appears to have begun to DETACH at its top. There is a very clear tear in the forest atop the mountain showing bare earth along the uppermost ridge there the trees on the land have torn away from each
other.  If this photo shows what the locals claim, then the landslide could happen today 
Those on the U.S. east coast must pay extra close attention to this today.  Events are taking place at a greatly increased speed.
If the entire chunk of land (the size of Manhattan, NYC)
Read 5 tweets
Spectacular Neon Blue Lava Pours From Indonesia's Kawah Ijen #Volcano At Night
#Thread
Heard of "red hot" and "white hot" to describe searing temperatures. But what about "blue hot"?

That's hue of Indonesia's Kawah Ijen Volcano, glows with an otherworldly "blue lava" at night. Image
The mountain contains large amounts of pure sulfur, which emits an icy violet color as it burns, turning the rocky slopes into a hot (at least 239 degrees Fahrenheit), highly toxic environment. ImageImage
Despite the dangers, photographer Olivier Grunewald captured the scene, along with a group of men who toil on the volcano at night, battling noxious gases to mine sulfur from the crater and carry it out by hand. Image
Read 4 tweets
An #eruption of #Nyiragongo #volcano (#DRC) began in the evening of May 22. #Meteosat satellite data (from @CIRA_CSU) show a strong thermal anomaly appearing at 17:15 UTC, and a small #volcanic plume amidst widespread regional convection. Follow @CharlesBalagizi for updates.
If you're looking for background info on #Nyiragongo and its previous flank #eruptions in 1977 and 2002, there's a collection of papers in the Italian Acta Vulcanologica journal available here (with free PDFs):
libraweb.net/articoli.php?c…
#Sentinel5P #Tropomi data on May 23 show SO₂ emissions from the #Nyiragongo #eruption. SO₂ to the SE over #Tanzania is at higher altitude (perhaps to tropopause level) and was emitted during the initial, more energetic phase of the eruption (17:00 UTC, May 22). @VirungaSupersit Image
Read 11 tweets
🇮🇩#Indonesia #Yogyakarta #Merapi #VOLCANO

Reports of avalanches and hot avalanches of Mount Merapi on January 20, 2021 at 12.00-18.00 WIB (UTC +7):
1. On January 20, 2021 at 14.07 WIB, a hot cloud of avalanche occurred which was recorded on the seismogram with an amplitude of 20 mm and a duration of 192 seconds. The sliding distance is estimated to be 1000 m, the weather is cloudy.
2. On January 20, 2021 at 14:27 WIB, a hot cloud of avalanches was recorded on the seismogram with an amplitude of 30 mm and a duration of 117 seconds. Awanpanas rolled into Boyong River with a sliding distance of 1500 m. The wind blows north.
Read 11 tweets
Protect yourself from ash. As the eruption continues at #lasoufriere, SVG we share this information taken from the The International Volcanic Health Hazard Network #IVHHN on ash and its associated hazard. #volcano #stilldangerous #svg #uwiseismic ImageImage
Volcan ash fall will be a pervasive hazard throughout St Vincent and is expected to reach neighbouring islands such as Barbados. Volcanic ash is not necessarily deadly but can lead to respiratory problems and may also impact vehicles and plane engines. #volcano #stilldangerous
Learn more about protecting yourself from ash as guided by the International Volcanic Health Hazard Network (IVHHN)
Volcanic ash information resources
ivhhn.org/information
Volcanic ash safety videos
ivhhn.org/information/iv…
Read 4 tweets
Another explosion observed. The vertical ash column estimated to have gone approximately 4km into the atmosphere. We continue to monitor and update. #lasoufrière #volcano #svg #redalert #stilldangerous ImageImage
Photos of the 2nd plume from the Observatory and from a camera at one of our seismic stations on the flanks of the volcano. #LaSoufriere #svg #uwi #redalert ImageImage
Occurred at 2:45 pm local time. Plume was clearly seen from the capital.
Read 4 tweets
As the PM of St. Vincent and the Grenadines has ordered an evacuation for the communities in the Red Zone, we share these maps produced under the Volcano Ready Communities Project for reference. Follow @nemosvg20 for more info. #svg #lasoufrière #volcano #uwi Image
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Read 8 tweets
#BREAKING🚨

#Guatemala #Pacaya #Volcano #Erruption

A big black smoke clouds can be visible seen.

Livestream by @ConredGuatemala

#Guatemala #Pacaya #Volcano #Erruption

Big black smoke 👀

Livestream by @ConredGuatemala
#Guatemala #Pacaya #Volcano #Erruption

Ashcloud should be high as 1,000 meters and moves south. Gonne check data...
Read 10 tweets
Potential #eruption started in #Fagradalsfjall - being investigated after reports of bright lights from the area #Reykjanes #Iceland #volcano #icerupt
Web cams show the bright light from the area. The Coast Guard helicopter being dispatched.
livefromiceland.is/webcams/reykja…
It has been confirmed by @krjonsdottir at @Vedurstofan that a volcanic eruption has started in #Fagradalsfjall on #Reykjanes peninsula in #Iceland - photo from @Vikurfrettir
Read 51 tweets
Heads up: Iceland has been monitoring #volcano unrest at #Reykjanes Peninsula. #Aviation color code orange due to quakes & indications of shallow magma dike. If an eruption occurs, ash hazard may affect North Atlantic air #travel. en.vedur.is/weather/aviati… #geology #weather Image
"Suspense in Iceland as dormant volcanic zone shows signs of life" by @physorg_com - volcanologists say a #Reykjanes eruption would likely be more lava than ash; not expecting repeat of 2010 Eyjafjallajokull #aviation #travel disruption phys.org/news/2021-03-s… #volcano #geology
"Sleeping Giant: Earthquakes And Volcanoes In #Reykjanes" by @rvkgrapevine - volcanologists describe how the peninsula's eruption history shapes expectations of possible volcanic activity to mostly lava flows, not explosions/ash grapevine.is/mag/feature/20… #Iceland #volcano #geology
Read 45 tweets

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