Fourth Dormant Volcano Shows Earthquake On West Coast – Mammoth Mountain California

ANOTHER dormant volcano has shown movement on the West coast of the United states.

After three other dormant volcanoes showed movement along the West coast ( just over the past few hours – late PM May 15th), now we see the area near Mammoth Mountain Volcano, located in Central Eastern California,  has experienced a 3.2M earthquake.

mammoth mountain may 15 2015 earthquake 3.2m

This makes FOUR different dormant volcanoes showing earthquake activity near the 3.0M level along the ENTIRE West coast in just a few hours time.

Mount Hood Volcano (Oregon), Glacier Peak Volcano (Washington State), Markagunt Volcanic plateau (Utah), and now Mammoth Mountain Volcano (California).

This dormant volcanic earthquake activity is a sign of greater seismic pressure building in the area.

The greater pressure means there is an increased threat of a larger earthquake in the region.  The amount of pressure it would take to displace the ENTIRE West coast from Washington state to South Central Utah is tremendous.

Not much chance of a large eruption, but we can’t rule out this possibility 100%.  That being said, I am leaning very far towards the threat of a larger earthquake in the near term.



We need to be extra vigilant in the light of the other news from 2 weeks ago , that a new undersea VOLCANIC ERUPTION is currently taking place off the West coast of Oregon.

The new eruption is taking place due West of this new earthquake near Mount Hood volcano.

On May 1, 2015 it was announced that a new layer of lava was laid out across the sea floor off the coast of Oregon. The lava came from a fresh eruption along the Juan De Fuca / Gorda Escarpment / Axial Seamount.

Above: Graphic from Oregon showing the location of the new eruption off the coast of Oregon (May 2015).


Video covering the new volcanic eruption 2 weeks ago (May 1 2015) here:


With an ACTIVE volcanic eruption just a small distance away from Mount Hood, and with dormant volcanoes showing earthquake activity further down the West coast in California, we need to watch for further noteworthy earthquake development in this region of the Pacific Northwest.

Keep watch in the areas warned 4 days ago (warned in the Earthquake forecast). The area near Vancouver Island British Columbia is expected to show higher earthquake activity in the next few days.

Watch the earthquake forecast for the Pacific Northwest United States here (issued May 11 2015):


Information on this most recent 3.2 magnitude earthquake near Mammoth Mountain volcano in California from the USGS:

Magnitude / uncertainty 3.2 ml± 0.3
Location / uncertainty 37.474°N 118.790°W± 0.3 km
Depthuncertainty 6.6 km± 1.7
Origin Time 2015-05-16 02:46:34.200 UTC
Number of Stations 36
Number of Phases 34
Minimum Distance 13.30 km (0.12°)
Travel Time Residual 0.05 sec
Azimuthal Gap 76°
FE Region Central California (40)

Original Article:


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