12/23/2015 — M4.3 (M4.4) earthquake + Swarm strikes Steamboat Springs Volcano @ the California / Nevada border

A rare M4.3 (M4.4 revised) earthquake, and subsequent swarm has struck directly on the flanks of Steamboat Springs Volcano at the border of Northeast California / Nevada.

Steamboat Springs last eruption occurred over 10,000 years ago.

4.3 earthquake california dec 23 2015


A zoom in on the area shows the Steamboat Springs dormant volcanic complex located at the earthquake epicenter near Reno Nevada.

This location is of GREAT importance to the most recent earthquake forecast, which had called for new noteworthy M4.0+ earthquake activity to strike either the Gorda Escarpment or the border of Nevada at a dormant volcano.

4.3 earthquake california dec 23 2015 steamboat springs

[wondering out loud why the USGS doesn’t mention the volcano located directly where this earthquake struck]

Now, just as the forecast called for, a M4.3 (M4.4) has struck a dormant volcano near the California / Nevada border DIRECTLY EAST of the Gorda Escarpment.

See the earthquake forecast issued 5 days ago (December 18) calling for a dormant volcano at the Nevada / California border to be struck by a M4.0+ earthquake this week:


Information on this earthquake from the USGS:

Magnitude/uncertainty 4.3 ml± 0.1
Location/uncertainty 39.418°N 119.808°W± 2.3 km
Depth/uncertainty 3.5 km± 6.4
Origin Time
Number of Stations
Number of Phases 35
Minimum Distance 4.79 km (0.04°)
Travel Time Residual 1.09 sec
Azimuthal Gap 48°
FE Region Nevada (37)