AVO reported that seismic activity at Iliamna began to increase at around 1200 on 5 June. Initially earthquakes occurred about every one minute, then became more closely spaced. The source of the activity was possibly from movement of magma or hydrothermal fluids beneath the volcano, though similar activity had been observed before large mass movements or avalanches; AVO could not rule out either.
Vertical-component seismic waveforms and spectrograms from AVO station ILSW for the May 2016, June 2019, and June 2023 avalanches on Iliamna volcano (image: AVO)
An elevated seismic activity occurred beneath the volcano yesterday.
Thu, 1 Jun 2023, 10:00
AVO reported that seismic activity at Iliamna began to increase at around 1200 on 5 June. Initially earthquakes occurred about every one minute, then became more closely spaced. The source of the activity was possibly from movement of magma or hydrothermal fluids beneath the volcano, though similar activity had been observed before large mass movements or avalanches; AVO could not rule out either.
Read allThu, 7 Mar 2013, 17:47
Recent quakes near Iliamna
Seismicity has risen again at the volcano recently, earthquake-report mentioned. Events as large as M1.4 occurred along a (ring?) fracture located south of the volcano's summit.
Sun, 3 Feb 2013, 14:14
Time and depth of rencent quakes under Iliamna volcano
Earthquake activity remains slightly increased.
Current seismic signal from Iliamna (INE station, AVO)
Sat, 2 Feb 2013, 08:26
Map of recent quakes near Iliamna (past 48 hours)
A swarm of earthquakes has started yesterday near Iliamna volcano. This morning, a 3.7 quake occurred about 30 km to the east, the strongest event in this new pulse of seismic activity so far.
Read allThu, 10 Jan 2013, 08:38
Alert level has been put back to "green", after a gradual decline in seismic activity has been observed since March 2012, even though some earthquakes are still being registered under the volcano.
Wed, 9 Jan 2013, 06:00
On 9 January, AVO reported that unrest at Iliamna had decreased over the past several months, reaching background levels. The Volcano Alert Level was lowered to Normal and the Aviation Color Code was lowered to Green. The report also noted that occasional small earthquakes had continued, but at a greatly reduced rate and magnitude relative to the peak of unrest in March 2012.
Read allSun, 28 Oct 2012, 09:29
Seismicity remains somewhat elevated. AVO has received no reports of activity at the volcano.
Wed, 24 Oct 2012, 06:00
AVO reported that during 24-30 October seismicity at Iliamna remained slightly elevated. Clear satellite and web camera views showed nothing unusual. The Alert Level remained at Advisory and the Aviation Color Code remained at Yellow.
Read allWed, 26 Sep 2012, 08:37
Seismicity remains very slightly above background. Satellite images of the volcano over the past 24 hours have been obscured by clouds. AVO has received no reports of unusual activity at the volcano. (AVO)
Sun, 2 Sep 2012, 10:05
No unusual activity was observed or reported in recent weeks. Seismicity remains slightly above background.
Sat, 11 Aug 2012, 08:12
No unusual activity has been observed or reported at Iliamna Volcano over the past week.
Read allThu, 5 Apr 2012, 10:05
Seismicity at Iliamna remained above background levels, although just slightly, during 25-27 March. When not obscured by clouds, satellite and web camera views showed nothing unusual.
Thu, 29 Mar 2012, 10:05
During 21-27 March seismicity at Iliamna remained above background levels and slightly during 25-27 March.
Wed, 28 Mar 2012, 06:00
AVO reported that during 28 March-3 April seismicity at Iliamna remained above background levels, although just slightly, during 25-27 March. When not obscured by clouds, satellite and web camera views showed nothing unusual. The Alert Level remained at Advisory and the Aviation Color Code remained at Yellow.
Read allThu, 22 Mar 2012, 07:32
Seismicity at Iliamna volcano continues to be above background levels and fumarolic activity and steaming has increased as well.
Read allWed, 21 Mar 2012, 06:00
AVO reported that during 21-27 March seismicity at Iliamna remained above background levels, although just slightly during 25-27 March. When not obscured by clouds, satellite and web camera views showed nothing unusual. The Alert Level remained at Advisory and the Aviation Color Code remained at Yellow.
Read allWed, 14 Mar 2012, 06:00
AVO reported that during 9-20 March seismicity at Iliamna was above background levels. Satellite images acquired during 9-16 March showed a plume drifting 56 km downwind that was likely water vapor. The report noted that long-lived fumaroles at the summit of Iliamna frequently produced visible plumes, but the current plume appeared to be more robust than usual.
Read allSat, 10 Mar 2012, 07:28
Today, AVO has raised the Aviation Color Code to YELLOW and Alert Level to ADVISORY at Iliamna Volcano following a sustained increase in seismic activity over the past 3 months.
Read allFri, 9 Mar 2012, 08:18
Seismic activity recorded at Iliamna volcano on 9 Mar 2012 (AVO)
Since the middle of January 2012, seismic activity at Iliamna volcano has increased with more than usual numbers of earthquakes greater than magnitude 2.
Read allWed, 7 Mar 2012, 06:00
AVO reported that earthquake activity had steadily increased at Iliamna during the past three months. On 9 March AVO increased the Alert Level to Advisory and the Aviation Color Code to Yellow. The report noted that the current activity was characterized by numerous earthquakes that had varied in their number and magnitude over the past week.
Read all