Iliamna - Historic eruptions

Reported Activity

start date	end date	title	description	icon	date limit	importance	link
1741-00-00	1741-00-00	Iliamna: 1741	Grewingk (1850, translated 2003 by Fritz Jaensch) writes that in 1741, Mt. Iliamna, or Bering's Mt. Dolmat, "grew quiet."	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=413&page=basic
1768-00-00		Iliamna: 1768	Sapper (1917) reports Iliamna active in 1768. However, Grewingk (1850, translated 2003 by Fritz Jaensch) does not mention Iliamna active in 1768, but does quote Cook as saying Iliamna was active in 1778. Cook (1795, reprinted by Beaglehole, 1967) does mention smoke from Iliamna in 1778. Perhaps the 1768 date is a typographical error made by Sapper.	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=414&page=basic
1778-05-00		Iliamna: 1778	Beaglehole (1967) writes that Cook reported "white smoke but no fire seen" at Iliamna in May, 1778.	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=415&page=basic
1779-00-00		Iliamna: 1779	Grewingk (1850, translated 2003 by Fritz Jaensch) listed Iliamna as active in 1779, as reported by Arteaga.	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=417&page=basic
1786-00-00		Iliamna: 1786	From Kisslinger (1983), translating Doroshin (1870): "Portlock and Dickson, who were at the entrance to Kenai Bay in 1786, appended to the description of their journey a view of Iliamna giving off smoke. It has not ceased smoking since that time. Smoke can be distinguished in three places: on the southeast side of the mountain, a little below the summit; from the cone found on the eastern rim, also below the summit; and from a third location, visible only under special conditions, which I did ... More information	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=418&page=basic
1793-00-00		Iliamna: 1793	Sapper (1917) lists smoke from Iliamna in 1793.	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=420&page=basic
1843-00-00		Iliamna: 1843	Grewingk (1850, translated 2003 by Fritz Jaensch) writes that Voznesenskii reported Iliamna active in 1843.	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=419&page=basic
1867-03-00		Iliamna: 1867	From Juhle (1955): "According to Dall (1894) the March 1867 eruption [of Iliamna] produced a light pumice and ash fall on St. Paul, Kodiak Island 165 miles to the southeast." This statement is confusing, because Juhle is referencing Dall, 1894, in Science, volume 3. However, volume 3 of Science was published in 1884, and, although there is an article by Dall published in that issue, it does not discuss Iliamna. Juhle continues with: "I.C. Russell (1897, p. 211 [listed in bibliography ... More information	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=421&page=basic
1876-00-00		Iliamna: 1876	Becker (1898) lists an eruption from Iliamna in 1876. Sapper (1917) and Coats (1950) call this eruption "smoke." However, Kienle and Swanson (1983) report this eruption as a "major eruption spreading ash to Kenai Peninsula (Rymer and Sims, 1976). The description for this 1876 eruption sounds similar to the description of the 1867 eruption. Waythomas and Miller (1999) suggest that perhaps this event was a flank collapse, with debris avalanches and lahars. Miller and others (1998) doubt ... More information	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=422&page=basic
1895-00-00		Iliamna: 1895	From Russell (1910): "In the summer of 1895, when last seen by Dall, it was sending out five or six parallel columns of steam, and seemed peaceful enough." This statement is confusing, because Russell (1910) is referencing Dall, 1894, in Science, volume 3. However, volume 3 of Science was published in 1884, and, although there is an article by Dall published in that issue, it does not discuss Iliamna.	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=423&page=basic
1933-05-03	1933-5-10	Iliamna: 1933	From Anchorage Daily Times (1933): "Capt. Heine Berger of the motorship Discoverer, now in port, reports that when the ship passed within close range of Mt. Iliamna about three days ago the peak no longer was throwing smoke. On the trip before, or about ten days ago, it was throwing volumes of smoke from three vents. This time, says the captain, no smoke whatever was visible and the weather was clear." From the Nome Nugget (May 8, 1933): "Mount Iliamna, which has been smoking through one ... More information	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=424&page=basic
1941-00-00		Iliamna: 1941	Juhle (1955) writes that Coats (1950) listed Iliamna with "steam and rumble" in 1941. However, Coats (1950) does not reference any event for Iliamna in 1941, but does list "smoke" for Iliamna in 1947.	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=425&page=basic
1947-06-00		Iliamna: 1947	Coats (1950) lists "smoke" at Iliamna in June, 1947. This is likely just steam from Iliamna's prominent and long-lived fumaroles, and not a volcanic eruption.	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=426&page=basic
1952-00-00		Iliamna: 1952	Powers (1958) lists "smoke" at Iliamna in 1952. This is likely just steam from Iliamna's prominent and long-lived fumaroles, and not a volcanic eruption.	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=427&page=basic
1953-03-01		Iliamna: 1953	Snyder (1954) reports that "The Anchorage Daily News of March 3 quotes a Mrs. William Tauscher of Anchor Point (Kenai Peninsula) as saying that Iliamna Volcano 'poured forth with a huge mushroom-shaped billow of inky black smoke at 7:30 a.m. Sunday (March 1).' Two distinct sources of eruption are claimed to have been sighted, one on top and one off to the side of the mountain. Lt. James Ingram USN flying about 50-75 miles south-southeast of the Iliamna area on March 3 gives a partial confirmation ... More information	asterisk_yellow.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=428&page=basic
1978-11-07		Iliamna: 1978	From Proffett and others (1980): "A brief steam eruption from Iliamna began at about 10:50 (local time) on 7 November, 1978. Puffs of steam, ejected every 1-5 minutes, rose an estimated 3 km above the summit. No ash was visible in the steam puffs. The activity ended at about 13:30. Iliamna's last reported activity occurred 1952-53. "A U.S. Geological Survey seismic station 20 km NNE of Iliamna recorded no unusual seismicity."	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=429&page=basic
1987-03-19	1987-5-2	Iliamna: 1987	From Smithsonian Institution (1987): "At 0800 on 19 March Reeve Aleutian Airways pilots Edward Livingston and Dale Schram observed a large steam plume rising about 1100 m above the summit. No ash appeared in the plume. Almost 3 hours later Northern Air Cargo pilot Wallace Niles observed a steam plume rising 1,000 m above the summit from a upper S flank vent. The plume drifted NNW. John Reeder noted that minor steam emissions are nearly continuous from Iliamna but a large steam plume is unusual." ... More information	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=430&page=basic
1992-04-30		Iliamna: 1992	From McGimsey and others (1995): "On April 30, pilot reports of 'a plume to 20,000 ft over Iliamna volcano' set off a chain reaction that culminated in a widespread rumor that an eruption had occurred or was in progess at Iliamna volcano. Subsequent reports also indicated Redoubt volcano was erupting. AVO promptly issued a widely distributed information release stating that no eruptive activity had occurred at any Cook Inlet volcano. Staff spent the afternoon answering dozens of calls and initiating ... More information	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=431&page=basic
1994-04-00		Iliamna: 1994	From Neal and others (1995): "Pilot reports of an exceptionally large steam plume above Iliamna Volcano reached an AVO staff member at home on the night of April 12. The next day, at least one phone call from the local media indicated that word had spread about possible eruptive activity at Iliamna; AVO staff were able to examine seismic data and determine that the volcano was quiet. AVO also responded by including a comment in the weekly update about common sightings of benign (non-eruptive) ... More information	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=567&page=basic
1996-05-10	1997-2-00	Iliamna: 1996 - 1997	From Neal and McGimsey (1997): "Two seismic swarms occurred beneath Iliamna Volcano in southern Cook Inlet in 1996. The first occurred between May 10 to May 28. The second swarm began abruptly at the end of July and peaked in late August or early September. Earthquakes as large as M 3.2 and at rates of up to 82 per day were recorded. The swarm began to decay by late 1996 and appeared to be over by early February, 1997. Most of the earthquakes during both swarms were shallower than 5 km and ... More information	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=432&page=basic
1997-05-19		Iliamna: 1997	From McGimsey and Wallace (1999): "On May 19, 1997, seismicity at Iliamna abruptly and dramatically increased. Analysis by AVO seismologists suggested that the activity probably resulted from a local avalanche or rockslide. A large avalanche of mixed snow, rock, and ice cascaded down the east flank on June 30, 1994, producing a similar seismic signature (Neal and others, 1995). An AVO field crew dispatched to make observations verified that indeed a large avalanche, composed mostly of ice and ... More information	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=433&page=basic
1999-07-06		Iliamna: 1999	From McGimsey and others (2004): "On July 6, 1999, AVO received a message from the FAA Center Weather Support Unit that a pilot had reported a fresh flow of mud and rock from the upper northeast flank of Iliamna. "Iliamna is an erosionally dissected ice- and snow-covered stratocone that lies 225 km southweast of Anchorage in the Aleutian Range. No historical eruptive activity has been documented, however, a prominent fumarole field near the summit produces a nearly constant steam plume, which ... More information	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=585&page=basic
2003-07-25		Iliamna: 2003	From McGimsey and others (2005): "On July 25, 2003, an avalanche of snow, ice, and rock occurred at Iliamna volcano, a site of frequent spring and summer avalanches (Neal and others, 1995; McGimsey and Wallace, 1999; McGimsey and others, 2004). The event lasted 4 minutes and was recorded on seismometers located as far away as 75 km (46 mi) on Augustine volcano. The avalanche presumably initiated from the same vicinity as in previous years, a steep portion of the east-southeast flank adjacent to ... More information	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=539&page=basic
2005-05-15	2005-5-15	Iliamna: 2005	From McGimsey and others (2007): "On May 15, 2005, AVO seismologists noted a swarm of unusual seismic activity at Iliamna. The events were emergent and prolonged (longest lasted 5-8 minutes), and were strongest at seismic station ILS, located on the south flank of South Twin (see fig. 14 in original text). The activity began about 1250 UTC and tapered off at 1718 UTC. Analysis revealed that the signals most likely were caused by a surficial process, such as a snow avalanche - a common occurrence ... More information	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=592&page=basic
2011-12-22		Iliamna: 2011	**As of this writing (March 19, 2012), Iliamna is exhibiting unrest, and has not erupted. On March 9, 2012, citing an increase in earthquakes at Iliamna over the past three months, AVO raised the alert level at Iliamna to ADVISORY and the aviation color code to YELLOW. Text from the March 9 VAN/VONA reads in part: "Over the past three months the earthquake rate at Iliamna Volcano has steadily increased and now exceeds normal background levels. Although it is not certain that this sustained increase ... More information	information.png	ye	50	http://www.avo.alaska.edu/volcanoes/activity.php?volcname=Iliamna&eruptionid=703&page=basic