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Open-File Report 95-271

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TABLE 1. Summary of 1994 VOLCANIC ACTIVITY in Alaska (this includes actual eruptions, possible eruptions and unusual increases in fumarolic activity). Location of volcanoes shown in figure 1.
Volcano
Date of Activity
Type of Activity
Kupreanof
7-22-94
pilot report of vigorous steam plume
Mount Veniaminof
7-30-931 to ?2
strombolian eruption; intermittent steam and ash bursts < 1km (3,208 ft) over volcano throughout year; lava flows issuing from the active cinder cone melt pit in summit ice.
Shishaldin Volcano
10-4-94
possible eruption; pilot report of a steam to 3 km (9,840 ft) with minor amounts of ash
Makushin Volcano
1-19-94
possible eruption; pilot report of steam and ash plume 1 km (3,208 ft) above summit
Mount Cleveland
4-29-94
possible eruption; pilot reports of robust steam plume with possible ash
Mount Cleveland
5-25-94
ash eruption; pilot report and satellite image of minor ash cloud to 11 km (36,080 ft); ashfall confined to north and east flank of the volcano; minor debris flows on southwest flank.
Mount Cleveland
10-20-94
possible eruption; satellite detection of "hot spot" at Mount Cleveland; no confirmation
Kanaga Volcano
4-93 3 to 10-13-944
steam and ash plumes, usually <1 km (3,208 ft) over the summit intermittently throughout 1994; avalanching of hot debris from blocky lava flow down the northwest flank into the sea; significant ash plumes to ~7.5 km (24,600 ft) altitude on 2-21, to ~4.5 km (14,760 ft) on 8-18
1
earliest known eruptive activity recorded by AVO
2
eruption possible continues in 1995
3
first sighting of increased steaming from Kanaga; AVO first received report 12-29-93
4
last eruptive activity inferred from satellite imagery

TABLE 2. Summary of FALSE ALARMS in 1994. A false alarm in defined as an eruption report or possible eruption report that is found to be normal fumarolic activity or weather-related or non-volcanic phenomena. Location of volcanoes shown in figure 1.
Volcano
Date of Activity
Type of Activity
Mount Sanford
9-30-94
false alarm; steam plume probably from snow/rock avalanche reported by pilot
Iliamna Volcano
4-12-94
false alarm; pilot reports of anomalous steam plume over Iliamna
Iliamna Volcano
6-30-94
false alarm; rock, snow, ice avalanche produces strong seismicity
Katmai Group
12-15-94
false alarm; meteorological cloud
Shishaldin Volcano
5-23-94
false alarm; meteorological cloud
Makushin Volcano
1-21-94
false alarm; meteorological conditions

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