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Jumbo Dome volcano

Lava dome 1369 m / 4491 ft
Eastern Alaska, United States, 63.97°N / -148.69°W
Current status: (probably) extinct (0 out of 5) | Reports
Jumbo Dome volcano books
Typical eruption style: unspecified
Jumbo Dome volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene)
TimeMag. / DepthDistanceLocation
Fri, 3 Apr 2020
Fri, 3 Apr 20:48 UTCM 2.9 / 5.5 km19 km26km N of Healy, Alaska (USA)
Fri, 3 Apr 11:07 UTCM 1.4 / 96.6 km17 km8km ESE of Healy, Alaska (USA)
Fri, 3 Apr 04:42 UTCM 1.4 / 5.2 km15 km8km E of Healy, Alaska (USA)
Thu, 2 Apr 2020
Thu, 2 Apr 03:21 UTCM 0.9 / 93.3 km19 km22km ESE of Healy, Alaska (USA)
Wed, 1 Apr 2020
Wed, 1 Apr 01:17 UTCM 1.4 / 67.3 km17 kmCentral Alaska (USA)
View all recent quakes

Background:

Jumbo Dome is a large cylindrical plug of hornblende andesite 1.6 km long, 1.3 km wide, and 500 m high which intrudes the Devonian Keevy Peak Formation basement and overlying Tertiary Suntrana Formation (AVO, 2005-). Ar/Ar dating by Athey et al. (2006) yielded an age for Jumbo Dome of 1.026 +/- 0.057 Ma.
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Source: Smithsonian / GVP volcano information


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