Source data
USGS magmatic episode record after the 18 May 1980 eruption
Sources checked
Volume is measured in million cubic yards of erupted material. All 21 episodes are in the searchable table.
USGS magmatic episode record after the 18 May 1980 eruption
The USGS volume includes lava flows, uncompacted airborne ash deposits and pyroclastic flows. The date marks the episode’s start. The 18 May 1980 eruption is outside this table.
| Source | |||
|---|---|---|---|
| 25 May 1980 | 41.8 | 1980 summer and fall explosive episodes | Source 1 |
| 12 June 1980 | 54.5 | 1980 summer and fall explosive episodes | Source 1 |
| 22 July 1980 | 13.1 | 1980 summer and fall explosive episodes | Source 1 |
| 7 August 1980 | 7.2 | 1980 summer and fall explosive episodes | Source 1 |
| 16 October 1980 | 3.6 | New dome growth and associated activity | Source 1 |
| 27 December 1980 | 2.1 | New dome growth and associated activity | Source 1 |
| 5 February 1981 | 4.7 | New dome growth and associated activity | Source 1 |
| 10 April 1981 | 5.4 | New dome growth and associated activity | Source 1 |
| 18 June 1981 | 5.4 | New dome growth and associated activity | Source 1 |
| 6 September 1981 | 5.1 | New dome growth and associated activity | Source 1 |
| 30 October 1981 | 4.7 | New dome growth and associated activity | Source 1 |
| 19 March 1982 | 4.4 | New dome growth and associated activity | Source 1 |
| 14 May 1982 | 3.5 | New dome growth and associated activity | Source 1 |
| 18 August 1982 | 6.0 | New dome growth and associated activity | Source 1 |
| 7 February 1983 | 29.3 | New dome growth and associated activity | Source 1 |
| 29 March 1984 | 1.4 | New dome growth and associated activity | Source 1 |
| 17 June 1984 | 1.2 | New dome growth and associated activity | Source 1 |
| 10 September 1984 | 4.8 | New dome growth and associated activity | Source 1 |
| 24 May 1985 | 5.6 | New dome growth and associated activity | Source 1 |
| 8 May 1986 | 7.6 | New dome growth and associated activity | Source 1 |
| 21 October 1986 | 8.0 | New dome growth and associated activity | Source 1 |