Novarupta Volcano
Updated: Apr 16, 2024 22:01 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)
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)
[smaller] [larger]
Novarupta volcano eruptions: 1912
Latest nearby earthquakes
| Time | Mag. / Depth | Distance / Location | |||
| Apr 10, 04:20 am (Anchorage) | 1.7 1.1 km | 7.7 km (4.8 mi) to the E |  85 km NNW of Karluk, Alaska | Info | |
| Tuesday, April 9, 2024 GMT (1 quake) | |||||
| Apr 9, 04:25 am (Anchorage) | 2.4 0 km | 8.4 km (5.2 mi) to the NE | 90 km NNW of Karluk, Alaska | Info | |
| Thursday, April 4, 2024 GMT (1 quake) | |||||
| Apr 4, 12:27 pm (Anchorage) | 1.6 8.1 km | 28 km (17 mi) to the E | 82 km N of Karluk, Alaska | Info | |
| Thursday, April 11, 2024 GMT (1 quake) | |||||
| Apr 10, 10:28 pm (Anchorage) | 1.2 107 km | 15 km (9.2 mi) to the NE | 93 km NNW of Karluk, Alaska | Info | |
| Wednesday, April 3, 2024 GMT (1 quake) | |||||
| Apr 2, 10:38 pm (Anchorage) | 1.1 4.6 km | 29 km (18 mi) to the S | 69 km NW of Karluk, Alaska | Info | |
| Sunday, April 14, 2024 GMT (1 quake) | |||||
| Apr 14, 10:30 am (Anchorage) | 0.8 1.1 km | 28 km (17 mi) to the NE | 91 km N 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.---
Smithsonian / GVP volcano information
Latest satellite images
