Mount Augustine is made up of a complex of overlapping
lava domes that are surrounded on all sides by
previously erupted lithic materials descending into the
sea. There are few exposed lava flows - most
of the lava erupted makes up the lava domes that are
subsequently destroyed - thus
the volcano's flanks are made up of mostly
debris-avalanche and pyroclastic-flow deposits that are
derived from the repeated collapse and resurgence of
Augustine's summit.1
(table based upon Global Volcanism Project summary; for
a brief summary of the most recent activity at Mt.
Augustine, refer to "Assignment 1" )
| Eruption Start
/ Stop Dates |
Dating
Technique |
VEI |
Area of
Activity |
Volume Erupted |
Eruptive Characteristics |
| 2005 Dec 9 (?) -
2006 Apr 27 (?) |
Historical Records |
3 |
-- |
-- |
Central vent eruption
Explosive eruption
Pyroclastic flow(s)
Phreatic explosion(s)
Lava flow(s)
Lava dome extrusion
Mudflow(s) (lahars) |
|
1986 Mar 27 -1986 Aug 31 |
Historical Records |
4? |
-- |
Tephra Volume: 1
x 108 m3 |
Central vent eruption
Explosive eruption
Pyroclastic flow(s)
Lava flow(s)
Lava dome extrusion
Spine extrusion
Damage (land, property, etc.)
Mudflow(s) (lahars) |
| 1976 Jan 22 (?) -
1977 May 14 (?) |
Historical Records |
4 |
-- |
Lava Volume: 6.5
x 107 m3 Tephra
Volume: 1.5 x 108 m3
|
Central vent eruption
Explosive eruption
Pyroclastic flow(s)
Lava dome extrusion
Damage (land, property, etc.)
Mudflow(s) (lahars) |
|
1971 Oct 7 -1971 Oct 8 |
Historical Records |
1 |
-- |
-- |
Central vent
eruption
Explosive eruption |
| 1963 Oct 11 -
1964 Aug 19 |
Historical Records |
2 |
-- |
Lava Volume:
1? x 107 m3 Tephra
Volume: 9.2 x 106 m3 |
Central vent eruption
Explosive eruption
Pyroclastic flow(s)
Lava dome extrusion
Mudflow(s) (lahars) |
| 1935 Mar 13 -
1935 Aug 18 |
Historical Records |
3 |
-- |
-- |
Central vent eruption
Explosive eruption
Pyroclastic flow(s)
Lava dome extrusion
Mudflow(s) (lahars) |
| 1908: Eruption is
uncertain |
-- |
-- |
-- |
-- |
Unknown |
| 1902: ERUPTION
DISCREDITED |
-- |
-- |
-- |
-- |
-- |
| 1883 Oct 6 -
1884 (?) |
Historical Records |
4 |
-- |
Lava Volume: 1.3
± 0.04 x 108 m3
Tephra Volume: 5.1 ± 5.0 x 108 m3 |
Central vent eruption
Explosive eruption
Pyroclastic flow(s)
Lava flow(s) (?)
Lava dome extrusion
Damage (land, property, etc.)
Mudflow(s) (lahars)
Tsunami (giant sea waves)
Evacuation
Debris avalanche(s) |
| 1812 |
Historical Records |
3? |
-- |
-- |
Central vent eruption
Explosive eruption
Pyroclastic flow(s)
Lava dome extrusion |
| 1650 ± 100 years |
Tephrochronology |
-- |
-- |
-- |
Central vent eruption
Explosive eruption (?)
Pyroclastic flow(s) (?)
Debris avalanche(s) |
| 1540 ± 100 years
|
Radiocarbon
(corrected) |
4? |
-- |
-- |
Central vent eruption
Explosive eruption
Pyroclastic flow(s)
Lava dome extrusion (?)
Tsunami (giant sea waves) (?)
Debris avalanche(s) |
| 1200 ± 75 years
|
Radiocarbon
(uncorrected) |
-- |
Tephra Layer M |
-- |
Central vent eruption
Explosive eruption |
| 890 AD ± 150 years
|
Radiocarbon
(uncorrected) |
-- |
Tephra Layer C |
-- |
Central vent eruption
Explosive eruption |
| 510 AD ± 200 years
|
Radiocarbon
(uncorrected) |
-- |
Tephra Layer H |
-- |
Central vent eruption
Explosive eruption |
| 230 AD ± 200 years
|
Radiocarbon
(uncorrected) |
-- |
Tephra Layer I |
-- |
Central vent eruption
Explosive eruption |
