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Novarupta Volcano

Updated: Mar 28, 2024 14:34 GMT -
Caldera 841 m / 2,759 ft
United States, Alaska Peninsula, 58.27°N / -155.16°W
Current status: normal or dormant (1 out of 5)
Last update: 6 Jan 2022 (Volcanic Ash Advisory)

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Typical eruption style: unspecified
Novarupta volcano eruptions: 1912 

Latest nearby earthquakes

TimeMag. / DepthDistance / Location
Mar 20, 09:54 am (Anchorage)
Mar 20, 17:54 GMT
1.2

3.5 km
15 km (9.1 mi) to the SW 86 km NW of Karluk, Alaska Info
Monday, March 18, 2024 GMT (1 quake)
Mar 18, 05:31 am (Anchorage)
Mar 18, 13:31 GMT
1.2

4 km
26 km (16 mi) to the NE 94 km NNW of Karluk, Alaska Info
Thursday, March 28, 2024 GMT (1 quake)
Mar 28, 01:24 am (Anchorage)
Mar 28, 09:24 GMT
1.0

11 km
27 km (17 mi) to the SW 85 km NW of Karluk, Alaska Info
Monday, March 18, 2024 GMT (1 quake)
Mar 17, 11:35 pm (Anchorage)
Mar 18, 07:35 GMT
0.7

2.2 km
13 km (7.9 mi) to the E 82 km NNW of Karluk, Alaska Info
Tuesday, March 19, 2024 GMT (2 quakes)
Mar 19, 01:08 am (Anchorage)
Mar 19, 09:08 GMT
0.6

1.1 km
13 km (8.1 mi) to the SW 85 km NW of Karluk, Alaska Info
Mar 18, 05:47 pm (Anchorage)
Mar 19, 01:47 GMT
0.6

0 km
14 km (8.5 mi) to the SW 86 km NW of Karluk, Alaska Info

Background

Novarupta, the least topographically prominent volcano in the Katmai area, was formed during a major eruption in 1912. This eruption was the world's largest during the 20th century and produced a voluminous rhyolitic airfall tephra and the renowned Valley of Ten Thousand Smokes (VTTS) ash flow. At the end of the eruption a small, 65-m-high, 400-m-wide lava dome grew to an elevation of 841 m within the source vent of the VTTS ashflow, a 2-km-wide area of subsidence NW of Trident volcano. The NE side of the Falling Mountain lava dome of the Trident volcanic cluster, as well as Broken Mountain and Baked Mountain, was removed by collapse of the Novarupta depression, which is marked by radial and scalloped arcuate fractures. Much larger collapse took place at Katmai volcano, 10 km to the east, where a 3 x 4 km wide caldera formed in response to magma reservoir drainage toward Novarupta.
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Smithsonian / GVP volcano information

Latest satellite images

novarupta satellite image sat1novarupta satellite image sat2