Novarupta volcano
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)
United States, Alaska Peninsula, 58.27°N / -155.16°W
Current status: normal or dormant (1 out of 5)
Last update: 26 Dec 2019 (Volcanic Ash Advisory)
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Novarupta volcano eruptions: 1912
Latest nearby earthquakes
| Time | Mag. / Depth | Distance/Location | ||
| Fri, 11 Jun 2021 (GMT) (1 earthquake) | ||||
| 11 Jun 2021 04:09:14 GMT | 0.7 4.3 km | 17 km (10.6 mi) 87 Km NW of Karluk, Alaska | ||
| Thu, 10 Jun 2021 (GMT) (1 earthquake) | ||||
| 10 Jun 2021 01:59:23 GMT | 0.1 15 km | 17 km (10.6 mi) 85 Km NNW of Karluk, Alaska | ||
| Tue, 8 Jun 2021 (GMT) (1 earthquake) | ||||
| 8 Jun 2021 16:39:03 GMT | 0.7 1.4 km | 9.5 km (5.9 mi) 85 Km NNW of Karluk, Alaska | ||
| Mon, 7 Jun 2021 (GMT) (1 earthquake) | ||||
| 7 Jun 2021 00:08:02 GMT | 1.5 3.1 km | 12 km (7.5 mi) 88 Km NW of Karluk, Alaska | ||
| Thu, 3 Jun 2021 (GMT) (1 earthquake) | ||||
| 3 Jun 2021 14:43:50 GMT | 2.7 220 km | 31 km (19 mi) Lake and Peninsula Parish, 113 mi northwest of Saint Paul, Kodiak Island, Alaska, USA | ||
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.---
Smithsonian / GVP volcano information
See also: Sentinel hub | Landsat 8
