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Iliamna volcano (Alaska): seismic activity continues to increase, alert level raised to yellow

Sat, 10 Mar 2012, 07:28
07:28 AM | BY: TOMPFEIFFER
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.
Current activity is characterized by numerous earthquakes that have varied in their number and magnitude over the past week. This sustained seismic activity does not mean that an eruption is imminent or certain. A similar seismic swarm was detected in 1996/1997 that was likely related to an intrusion of magma at depth did not culminate in an eruption.
(Alaska Volcano Observatory)

Previous news

Fri, 9 Mar 2012, 08:18

Iliamna volcano (Alaska): seismic unrest, but alert level remains at green

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 all
Wed, 7 Mar 2012, 06:00

Iliamna volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 7 March-13 March 2012 (New Activity / Unrest)

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
Iliamna volcano
stratovolcano 3053 m / 10,016 ft
Cook Inlet (SW Alaska), 60.03°N / -153.09°W
Current status: normal or dormant (1 out of 5) Iliamna volcano eruptions:
1953(?), 1952(?), 1933(?), 1876, 1867, 1843(?), 1793(?), 1778-79, 1768(?)
radiocarbon-dated: 1650 ?, 450 BC ?, 2050 BC ?, 5050 BC ?
Typical eruption style
explosive
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