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Global Sea Ice Extent

September 17th Data:

Arctic Sea Ice: 1.2 Million km

Antarctic Sea Ice: 1.5 million km

Net Global Sea Ice Deviation: 0.3 million km

Mammoth Lakes Earthquakes Now Exceed 1000 In Latest Seismic Swarm

The Long Valley Caldera is experiencing a large seismic swarm. As magma moves through the earth, it displaces and fractures rock along the way. This movement causes earthquakes that can be recorded with seismometers at the surface of the earth. Seismic monitoring is the most used technique for volcano surveillance. Volcanic earthquakes often provide the initial sign of volcanic unrest. The last eruption at the volcano is said to have occurred 700,000 years ago and is long over-due. […]

Is Long Valley Coming To Life?

In case you didn’t know, there has been a sizable earthquake swarm in Long Valley. The last update I saw stated the current swarm had produced over 600 quakes. While most of these quakes have been small, a number of them have been in excess of magnitude 3.0. The USGS states that the quakes are currently tectonic in nature and that there is no sign of magma movement. […]

Information about the Long Valley Caldera.

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