All volcanoes in California were at normal levels of activity last week. usgs.gov/programs/VHP/v… In today's photo, a wash of color from spring flowers drapes the slopes of Ubehebe Craters maar volcanoes in Death Valley. The craters were probably formed about 2,100 years ago.

#VolcanoAwarenessMonth
What does it mean to be 'normal?' Each volcano is different. Scientists collect data to establish a baseline for normal conditions at each volcano. It doesn't mean nothing is happening. It just means activity is what is expected during non-eruptive times.

On Memorial Day, we want to remember Sgt. Fred W. Purchase, who sadly died during WWII when Cleveland Volcano erupted while he was on Chuginadak Isl. Sgt. Purchase has the solemn distinction of being the only person directly killed by a volcano in AK whose identity we know. (1/5)

You may have heard of radium in connection to French scientists Marie and Pierre Curie. But what is it, and why was an early researcher looking for it in Yellowstone National Park? This week's #Yellowstone #CalderaChronicles is radioactive, man!

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#VolcanoAwarenessMonth
When conditions change, #USGS conveys info using a series of standard notifications. Alert Levels (Normal, Advisory, Watch, Warning) inform people about the state of volcanic unrest or eruption. Color Codes refer to hazardous conditions in the air, like ash

Today marks the 3rd anniversary of the current eruption of Great Sitkin Volcano, which started with a bang May 25, 2021. 3 years sounds like a long time, but it still has a way to go to match Mount Yasur which has been erupting for ~1200 yrs!
#Alaska
USGS Volcanoes🌋 UAF Geophysical Institute Alaska DGGS

Cascade volcanoes at normal background levels of activity this week: usgs.gov/programs/VHP/v…. Small magnitude EQs detected at Baker, Rainier, St. Helens, Newberry (all background levels). Apr 21, 2024 #MountStHelens timelapse courtesy of Ian Reed, Mount St. Helens Institute.

The next time you’re on #HVO 's website to check a location of an earthquake, view a webcam image, or see how the ground is deforming, think about the IT infrastructure and the exceptional #USGS personnel who make it work. How do they do it? #VolcanoWatch
usgs.gov/observatories/…

When it comes to natural hazards, volcanic events can be a different beast: it's difficult to forecast exactly when an eruption occurs, how long it lasts, how it changes over time & what consequences will be. Know hazards, stay informed, be #VolcanoREADY .
#VolcanoAwarenessMonth

Each volcano & each eruption is a little different. An Event Tree helps scientists think about scenarios, assign probabilities, present range of outcomes & trigger points for concern. Info shared with emergency officials & the public to help make decisions. #VolcanoAwarenessMonth

All volcanoes in California were at normal levels of activity last week. usgs.gov/programs/VHP/v… When the 'big boss' visits, volcanologists talk volcanoes! CalVO Seismologist Alicia Hotovec-Ellis recently presented her earthquake research to Secretary of the Interior Deb Haaland.

#VolcanoAwarenessMonth
Volcanic unrest comes with a wide range of uncertainties for scientists & emergency managers. Monitoring instruments detect changes but there is no formula for how or when an eruption might occur. Decisions need to be made early. Not good to wait-and-see.

#VolcanoAwarenessMonth
In Sep 2004, USGS scientists detected sudden signs #MountStHelens was waking up: hundreds of small earthquakes & deformation of crater floor. Within a week, several eruptions blasted ash into atmosphere. Soon after, a new lava dome emerged in the crater.

#HVO staff are at #MaunaLoa for the volcano's annual GPS survey. GPS are deployed at established benchmarks and recorded positions are compared with those from previous years to see if there have been any subtle patterns of ground deformation associated with volcanic activity.

Is Yellowstone overrated? As a disaster movie subject, maybe… This week, #Yellowstone #CalderaChronicles fact checks some of the more common media claims to separate reality from fantasy.

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For scientists, the days were a blur. They worked to re-establish monitoring networks, map deposits, measure temperatures, collect samples. Each was a piece of a puzzle that could help explain what happened on May 18, 1980, and what to expect in the future. #VolcanoAwarenessMonth

#MountStHelens May 18, 1980, 8:32 AM. A colossal landslide. Magma & hot fluids explode, surge outward like a hot hurricane. Column rises, ash falls for miles. Snowpack melts, mudflows converge, lahars move downvalley. A 9-hr eruption. Everything is changed.
#VolcanoAwarenessMonth

Cascade volcanoes at normal background levels of activity this week: usgs.gov/programs/VHP/v…. #CVO field teams were at #MountStHelens this week to conduct maintenance at monitoring stations. Team was able to troubleshoot issues with GPS and radio equipment (telemetry).