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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VIDEO: Lava spews overnight from Europe's most active volcano
2019-07-20T21:11:15Z
Mount Etna erupted overnight, belching out lava. Eruptions from the volcano, Europe's most active, provide spectacular views at night, and Etna is a ... -
Sabancaya Volcano Volcanic Ash Advisory: continuous ash emissions
2019-07-20T19:41:15Z
Sabancaya volcano news & activity updates: Sabancaya Volcano Volcanic Ash Advisory: continuous ash emissions. Saturday Jul 20, 2019 19:45 PM ... -
Watch: Mount Etna erupts spewing lava and ash into the sky
2019-07-20T18:56:15Z
The Europe's tallest and most active volcano often erupts but rarely causes damage, while the eruptions themselves do not put the local population at ... -
Orange alert called as Ubinas volcano spews ash across southern Peru
2019-07-20T18:00:00Z
Mt. Ubinas, the most active volcano in the chain in Peru's southern Andes, located 70kms from the city of Arequipa. Source: IGP. The government has ... -
Light mag. 4.0 earthquake - Kazakhstan-xinjiang Border Reg. on Saturday, 20 July 2019 ...
2019-07-20T18:00:00Z
Nearest volcano: Tianshan (360 km) Primary data source: EMSC Estimated released energy: 6.3*10^10 J (17.5 MWh / 15.1 tons of TNT) [learn more]. -
VOLCANO WATCH: Heat, Gases Linger On Kilauea East Rift Zone
2019-07-20T16:52:30Z
PUNA, Hawaiʻi - Although not currently erupting, at and uprift of the 2018 lower East Rift Zone eruptive fissures, there are areas of persistently ...
| 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 |