The Pacific Northwest Seismic Network, based at the 91探花, will host an online event on the 40th anniversary of the eruption of Mount St. Helens, featuring seismologists from the 91探花and other institutions who can explain the events before, during and after the historic blast. The virtual event will take place from 6:30 to 8 p.m., Monday, May 18, on the PNSN鈥檚 YouTube channel — exactly 40 years after the blast. The group will stream prerecorded talks from…
Research that peers below Mount St. Helens finds that the material below the western and eastern half of the mountain is different material and temperatures, and suggests that the source of explosive magma is coming from the east.
Rock from a common type of volcano shows surprising evidence of the descending tectonic plate. Analyses show that magnesium atoms are somehow drawn out of the crust, deep below the surface.
The first simulation of the individual crystals in volcanic mush, a mix of liquid magma and solid crystals, shows the mixing to help understand pressure buildup deep inside a volcano.
Sensors on the ocean’s floor installed by 91探花researchers show that late on April 23, a seismic event took place on the 3,000-foot underwater volcano off Oregon’s coast.
Scientists are embarking on research to improve volcanic eruption forecasting by learning more about how a deep-underground feeder system creates and supplies magma to Mount St. Helens.
Swarms of small earthquakes before a volcanic eruption can come in such rapid succession that they create a signal called harmonic tremor. A new eruption analysis from Alaska’s Redoubt Volcano shows the harmonic tremor glided to higher frequencies, then stopped abruptly just before six eruptions in 2009.
The Kamchatka Peninsula and Kuril Islands, long shrouded in secrecy by the Soviet government, are a seismic and volcanic hotbed with a potential to trigger tsunamis that pose a risk to the rest of the Pacific Basin.