Yellowstone Magma Chamber Earthquake Activity; Signs Of Pressure Mounting

Two volcanic earthquakes have struck Idaho , and Wyoming over the past 12 hours.   Both earthquakes related to the volcanic chambers below the famous Yellowstone Super-Volcano.

yellowstone earthquake may 18 2015
Above: May 18, 2015 — Yellowstone Supervolcano shows earthquake activity across the whole of the magma chamber.

Both seismic events registered in the 3.0M+ range, and occurred directly along the line of the Yellowstone Magma chamber.  One of the earthquakes struck directly inside of Yellowstone national park.

The underground magma chamber for the Yellowstone Supervolcano has now been confirmed to reach far West into Idaho, and North into Montana.

western yellowston magma chamber earthquake may 9 2015
Above: Graphic showing a recent May 9, 2015 earthquake, and the location of the magma chamber for Yellowstone.


New measurements have also revealed that over 11 grand canyons worth of Magma (11,000+ cubic miles) is stored below this well known ‘supervolcano’.

The lower, larger magma chamber extends far West and North from the actual current Yellowstone National Park area.

This large magma chamber is showing earthquake activity due to pressure being placed on the magma chambers below via the North American Craton being displaced from the Pacific Northwest.

In addition to this Yellowstone earthquake activity, we have also seen multiple dormant volcanoes show earthquake activity over the past week all along the West coast of the United States.

There has even been an announcement that Glacier Peak Volcano in Washington State is now being monitored for possible eruptive activity.


Information on these two earthquakes from the USGS:


Magnitude / uncertainty 3.0 ml± 0.2
Location / uncertainty 44.583°N 110.364°W± 0.3 km
Depth / uncertainty 5.0 km± 1.3
Origin Time 2015-05-18 23:00:51.330 UTC
Number of Stations 22
Number of Phases 22
Minimum Distance 3.45 km (0.03°)
Travel Time Residual 0.18 sec
Azimuthal Gap 71°
FE Region Yellowstone National Park, Wyoming (459)


Magnitude / uncertainty 3.2 ml± 0.0
Location / uncertainty 44.467°N 114.153°W± 2.9 km
Depth / uncertainty 2.8 km± 6.6
Origin Time 2015-05-18 15:22:56.510 UTC
Number of Stations
Number of Phases 21
Minimum Distance 14.47 km (0.13°)
Travel Time Residual 0.46 sec
Azimuthal Gap 68°
FE Region Southern Idaho (33)

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