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News

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. ... [meer...]
Map of recent quakes near Mammoth Mountain
Sunday, Feb 03, 2013
Small earthquakes continue beneath and (mostly) immediately to the SE of Mammoth Mountain in the Sierra Nevada range. [meer...]
 

Mammoth Mountain vulkaan

lavakoepels 3369 m / 11,053 ft
California, USA, 37.63°N / -119.03°W
Current status: normal or dormant (1 out of 5)
Mammoth Mountain webcams / Live-gegevens | Reports
Mammoth Mountain vulkaan boeken
Last update: 11 Feb 2014 (occasional seismic swarms)
Typical eruption style: uitbundig
Mammoth Mountain vulkaanuitbarstingen: 1260 ± 40 years
TijdMag. / DiepteAfstandLocatie
Fri, 10 Apr 2020
Fri, 10 Apr 16:16 UTCM 0.6 / 8.1 km26 km18km SW of Toms Place, CA (USA)
Thu, 9 Apr 2020
Thu, 9 Apr 21:31 UTCM 0.10 km5km WSW of Mammoth Lakes, CA (USA)
Thu, 9 Apr 04:40 UTCM 0.6 / 2.1 km23 km17km WSW of Toms Place, CA (USA)
Wed, 8 Apr 2020
Wed, 8 Apr 07:01 UTCM 0.7 / 3.7 km24 km17km WSW of Toms Place, CA (USA)
Tue, 7 Apr 2020
Tue, 7 Apr 22:42 UTCM 0.3 / 0.9 km4 km5km SSW of Mammoth Lakes, CA (USA)
Bekijk alle recente aardbevingen
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.

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.
(Source: GVP)


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