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St. Helens: eruption history
Elevation2,549 m
TypeStratovolcano
Confirmed eruptions40#8 of 165 in country
Latest eruption2004-10-01
Largest VEI6
Location46.20, -122.18
Eruptions per century (since 1500)
1
1
0
10
3
1
By VEI
2
9
3
7
1
Eruptions (latest first, up to 60)
| Start | VEI | End | Area |
|---|---|---|---|
| 2004-10-01 | 2 | 2008 | South of 1980-1986 lava dome |
| 1990-11-05 | 3 | 1991 | North side of lava dome |
| 1989-12-07 | 2 | 1990 | North side of lava dome |
| 1980-03-27 | 5 | 1986 | Summit and north flank |
| 1857-04-16 | 2 | – | |
| 1854-02-16 | 2 | 1854 | North flank |
| 1853-03-15 | 2 | 1853 | North flank |
| 1850-03-16 | 2 | 1850 | North flank |
| 1848-04-01 | 2 | – | |
| 1847-03-26 | 2 | 1847 | North flank (Goat Rocks) |
| 1842-11-22 | 3 | 1845 | North flank (Goat Rocks) |
| 1835-03-16 | 2 | – | North flank (Goat Rocks area) |
| 1831-08-16 | 3 | – | North Flank (Goat Rocks area) |
| 1800-01-15 | 5 | – | N flank--Goat Rocks area |
| 1610 | – | – | Pre-1980 summit dome |
| 1525 | – | – | |
| 1482-01-15 | 5 | – | |
| 1480-01-15 | 5 | – | |
| 780 | – | – | NE flank (Sugar Bowl) |
| 420 | – | – | |
| 270 | – | – | |
| 230 | 0 | – | |
| 190 | – | – | Lower E flank (East Dome) |
| 100 | 0 | – | SW flank (Cave basalts) |
| 100 BCE | – | – | |
| 220 BCE | – | – | NNE flank (Dogs Head) |
| 250 BCE | – | – | |
| 280 BCE | – | – | |
| 530 BCE | 5 | – | |
| 800 BCE | – | – | |
| 830 BCE | – | – | |
| 1010 BCE | – | – | |
| 1100 BCE | – | – | |
| 1180 BCE | – | – | |
| 1610 BCE | – | – | |
| 1680 BCE | – | – | |
| 1770 BCE | 5 | – | |
| 1860 BCE | 6 | – | |
| 2100 BCE | – | – | |
| 2340 BCE | 5 | – |
Nearby volcanoes
| Volcano | Distance | Eruptions |
|---|---|---|
| West Crater | 36 km | 2 |
| Indian Heaven | 41 km | 1 |
| Adams | 53 km | 15 |
| Rainier | 79 km | 20 |
| Hood | 99 km | 5 |
| Jefferson | 172 km | 2 |
| Blue Lake Crater | 201 km | 1 |
| Sand Mountain Field | 203 km | 2 |
Eruption records from the Smithsonian Global Volcanism Program; older eruptions may be missing. VEI = Volcanic Explosivity Index (0–8). For current alerts, check the official agency.