US-WASHINGTON
This volcano erupted on -1860 B.C. in UnitedStates where it released a signifant amount of explosivity , reaching a Volcanic Explosivity Index of 6 (VEI: 6). The VEI scale was developed by the USGS and is open-ended with the largest volcanoes in history given a magnitude 8. A value of 0 is given for non-explosive eruptions . This particular volcano, named St.Helens is classified as a historical stratovolcano and is perched at an elevation of 2549ft.
Surface Geology
Underlying geological composition for the surrounding area.
Alaska Peninsula and Aleutian Islands - porphyry copperTertiary felsic to intermediate composition intrusions of the Alaska Peninsula and Aleutian Islands
Pacific Margin - porphyry copper
Cretaceous through middle Tertiary volcanic and intrusive rocks representing a series of continental- and island-arc systems accreted and superimposed onto the paleomargin of northeast Asia.
Surface Lithology
Qv - Igneous - VolcanicYoungest volcanic rocks
Related USGS Publications
70159748 - 2016 - Unusually large tsunamis frequent a currently creeping part of the Aleutian megathrust70142817 - 2015 - Basement and regional structure along strike of the Queen Charlotte Fault in the context of modern and historical earthquake ruptures
sir20155110 - 2015 - 2013 volcanic activity in Alaska: summary of events and response of the Alaska Volcano Observatory
Latest Volcano Events
Recent Volcano activity from around the globe.
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Incredible photo shows a lightning bolt hitting an erupting volcano in Guatemala
2019-11-14T10:51:13Z
"When the storm stopped and the clouds disappeared the volcano started displaying this amazing and breathtaking thunderstorm, so I decided to ... -
Light mag. 4.4 earthquake - Bali Region, Indonesia on Thursday, 14 November 2019 ...
2019-11-14T10:21:36Z
Nearest volcano: Bratan (30 km) Primary data source: BMKG Estimated released energy: 2.5*10^11 J (69.8 MWh / 60 tons of TNT) [learn more]. -
Hula Arts at Kilauea to feature students of Ke Kula 'O Nawahiokalani'opu'u PCS
2019-11-14T10:07:33Z
Volcano Art Center's Hula Arts at Kilauea performance series continues Saturday, Nov. 16, with a presentation of hula kahiko by kumu Ha'amauliola ... -
This Volcano Destroyed an Island, Then Created a New One
2019-11-14T10:01:09Z
Lateiki was a tiny island in the archipelagic Kingdom of Tonga, formed in 1995 by an ebullient submarine volcano. Last month, that underwater ... -
Sakurajima volcano (Kyushu, Japan): weekly volcanic activity report 16 November-12 November ...
2019-11-14T08:57:10Z
JMA reported that incandescence from Minamidake Crater (at Aira Caldera's Sakurajima volcano) was visible at night during 5-11 November. -
Manam volcano (Papua New Guinea): weekly volcanic activity report 6 November-12 November ...
2019-11-14T08:03:42Z
RVO reported that at 13:30 on 2 November a single large explosion at Manam generated a dense dark ash plume that rose 1 km above the summit ...
| Nearby Tsunamis | |
|---|---|
|
7 mag |
N.MEXICO 11-29-1852 T00:00:00 |
|
5.7 mag |
S.CALIFORNIA 01-01-1927 T08:17:00 |
|
5.9 mag |
S.CALIFORNIA 05-27-1862 T20:00:00 |
|
6.3 mag |
S.CALIFORNIA 03-11-1933 T01:54:7.8 |
|
6.4 mag |
S.CALIFORNIA 12-25-1899 T12:25:00 |
|
5.2 mag |
S.CALIFORNIA 08-31-1930 T00:40:38 |
|
6 mag |
S.CALIFORNIA 07-11-1855 T04:15:00 |
|
7.5 mag |
S.CALIFORNIA 12-21-1812 T19:00:00 |
|
6.7 mag |
WESTCOAST,USA 01-17-1994 T12:30:55.3 |
|
7.3 mag |
S.CALIFORNIA 11-04-1927 T13:50:43 |
| Volcano Measurement | |
|---|---|
| |
| Volcano Stats | |
|---|---|
| year | -1860 |
| id | 11 |
| location | US-Washington |
| time | -1860 B.C. |
| latitude | 46.2 |
| type | Stratovolcano |
| vei | 6 |
| status | Historical |
| elevation | 2549 |
| name | St.Helens |
| longitude | -122.18 |
| country | UnitedStates |