Tuesday, Feb 11, 2014
An small earthquake swarm at shallow depths (around 5 km) occurred east of Mammoth Mountain during the past week. The largest quake was a magnitude 3.0 event on 5 Feb. ...
Sunday, Feb 03, 2013
Small earthquakes continue beneath and (mostly) immediately to the SE of Mammoth Mountain in the Sierra Nevada range.
Mammoth Mountain volcano
Mammoth Mountain is a lava-dome complex on the SW rim of Long Valley caldera, California. Despite its close geographic relation, it is believed that it has its own magma chamber different from the ones underlying Long Valley caldera and the Inyo craters.
11 Feb 2014 (occasional seismic swarms)
Typical eruption style
Mammoth Mountain volcano eruptions
: 1260 ± 40 years
View all recent quakes
|Time||Mag. / Depth||Distance||Location|
|Mon, 18 Aug|
|Mon, 18 Aug 15:53 UTC||M 0.3 / 7.6 km||15 km||12km SE of Mammoth Lakes, California|
|Mon, 18 Aug 05:54 UTC||M 1.1 / 10.1 km||34 km||29km ENE of Oakhurst, California|
|Mon, 18 Aug 03:24 UTC||M 1.0 / 7.5 km||20 km||18km SE of Mammoth Lakes, California|
|Mon, 18 Aug 02:29 UTC||M 0.6 / 6.4 km||24 km||22km SSE of Mammoth Lakes, California|
|Sun, 17 Aug|
|Sun, 17 Aug 00:18 UTC||M 0.9 / 7.7 km||10 km||14km E of Mammoth Lakes, California|
Background:The last eruption of the lava dome complex itself took place about 57,000 years ago. There are more than 35 vents fed by the same magma chamber, including Red Cones, two basaltic cinder cones SE of Mammoth Mountain and SE of Devils Postpile National Monument. The cones, whose name derives from their colorful upper scoria deposits, were radiocarbon dated at about 8900 years ago.
Phreatic eruptions on the north side of Mammoth Mountain took place about 700 years ago. The recent unrest, including seismicity, gas emission, and tree kill, at the Long Valley caldera is thought to be related to a dike intrusion beneath Mammoth Mountain in 1989.
By the time we have arrived on the NW side of the summit craters, the sun has risen and Etna drops her majestic morningshadow to the West over Sicily. (Photo: Tom Pfeiffe...
The lava flow has destroyed the cable car (Etna eruption July 2011). (Photo: Tom Pfeiffer)
Strombolian activity at Etna's SE crater in October 2006. The lights of Catania in the background. (Photo: Tom Pfeiffer)
Ash plume from a strombolian eruption in Bocca Nuova crater. (c)
Eruption from the new crater and silhouette of an old cable car. (c)
Bay with beach and natural sea cave (Photo: Tom Pfeiffer)
More on VolcanoDiscovery:
One of the world's most famous volcanoes looming over the City of Naples
: Our professional team of volcanologists and photographers offers unique travel opportunities: volcano expeditions, photo tours, and relaxed walking & study tours.