Mount St Helens , United States : Small magnitude earthquake swarm continues at Mount St. Helens.

Mount St Helens , United States : Small magnitude earthquake swarm continues at Mount St. Helens.

  Small magnitude earthquake swarm continues at Mount St. Helens. Beginning March 14, 2016, a number of small magnitude earthquakes have occurred beneath Mount St. Helens, at a depth between 2 and 7 km (1.2 to 4 miles). Over the last 8 weeks, there…

Yellowstone , United States : Current deformation patterns at Yellowstone remain within historical norms.

Yellowstone , United States : Current deformation patterns at Yellowstone remain within historical norms.

Seismicity During April 2016, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 53 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a micro earthquake of magnitude 2.0 on…

Cascades Range , United States : small earthquakes continued under Mount Rainier and Mount St. Helens,

Cascades Range , United States :  small earthquakes continued under Mount Rainier and Mount St. Helens,

Current Volcano Alert Level: NORMAL Current Aviation Color Code: GREEN Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background levels of seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in…

Yellowstone , United – States : Clarification .

Yellowstone , United – States : Clarification .

In response to some press reports, here’s a clarification. The only reliable data are those from the volcano observatories. For the United States, you can visit: The USGS site of AVO: Alaska Volcano Observatory (Cleveland Volcano, Shishaldin, etc ..) The site of the USGS…

California Volcanoes , United – States : normal levels of background seismicity and deformation.

California Volcanoes , United – States : normal levels of background seismicity and deformation.

Current Volcano Alert Level: all NORMAL Current Aviation Color Code: all GREEN Activity Update: All volcanoes monitored by CalVO using telemetered, real-time sensor networks exhibit normal levels of background seismicity and deformation. Volcanoes monitored include Mount Shasta, Medicine Lake Volcano, Clear Lake Volcanic Field,…

Yellowstone , United- States : wonderful article from Claude Granpey published on its website .

Yellowstone , United- States : wonderful article from Claude Granpey published on its website .

I reproduce here “in extenso” a wonderful article from Claude Granpey published on its website: http://claudegrandpeyvolcansetglaciers.com Up to now, the common theory about the origins of Yellowstone was that the so-called supervolcano was born from a hotspot, in other words a mantle plume emerging…

Yellowstone , United -States : earthquake activity in February is at low background levels.

Yellowstone , United -States : earthquake activity in February is at low background levels.

Seismicity During February 2016, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 35 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a micro-earthquake of magnitude 2.4 on February…

Cascade Range ,United States : very small earthquakes under the summit of Mount Rainier.

Cascade Range ,United States : very small earthquakes under the summit of Mount Rainier.

Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background levels of seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; and Mount Hood, Mount Jefferson, Three Sisters, Newberry,…

California Volcanoes, United States : all NORMAL .

California Volcanoes, United States :  all NORMAL .

Activity Update: All volcanoes monitored by CalVO using telemetered, real-time sensor networks exhibit normal levels of background seismicity and deformation. Volcanoes monitored include Mount Shasta, Medicine Lake Volcano, Clear Lake Volcanic Field, Lassen Volcanic Center, Long Valley Volcanic Region, Coso Volcanic Field, Ubehebe Craters,…

Yellowstone , United States : earthquake activity was within background levels.

Yellowstone , United States : earthquake activity  was within background levels.

As each month, the Yellowstone Volcano Observatory publishes its newsletter. Yellowstone being a volcano, so it is normal that I publish this newsletter. However, it should be noted: The term « background level » means the lowest level of activity. (here residual). NO, Yellowstone…