Pertinent portions of past information releases are below. Full archive copies of all reports can be found in the Updates section of this site.

• Perryville residents reported that a steam emission, possibly containing a small amount of volcanic ash, was visible above Mount Veniaminof most of the day on April 18, 2004. It became most vigorous at approximately 5:30 pm ADT (01:30 UTC April 19) when it rose to 1500-2000 feet above the intracaldera cone (8500-9000 feet above sea level). Over the past week, there have been several episodes of low-level volcanic tremor and small volcanic earthquakes. Seismic activity was most energetic from April 14 to 17 and then decreased notably prior to the emissions observed on April 18. Starting at approximately 11:30 ADT today, tremor and earthquake levels increased, albeit to lower levels than those during the previous week.

  The recent activity is above what we consider to be normal background. Thus the color code for Mount Veniaminof has been upgraded to YELLOW. Steam and ash emissions similar to those reported on April 18 may occur. However, there are no indications from seismic data that events significantly larger than those observed on April 18 are imminent.

• Current Level of Concern Color Code: YELLOW

  Following several episodes of low-level volcanic tremor last week, and reports of increased steam emission that possibly contained some ash, AVO raised the Concern Color Code to YELLOW on Monday, April 19. During subsequent days this week there has been a marked decrease in the episodes of low-level volcanic tremor and small volcanic earthquakes. Seismic activity was most energetic from April 14-17 and then decreased notably prior to the emissions observed on April 18. No emissions were reported this week.

• Current Level of Concern Color Code: YELLOW

  Activity continues at Mount Veniaminof, and is characterized by episodes of steam and ash emissions and small volcanic earthquakes. A newly installed internet camera based in Perryville allows AVO to observe the volcano during clear weather. On the afternoon and evening of April 25, more than 25 small steam and ash emissions were seen during an 8-hour time period, producing clouds that rose 1000-2000 ft above the active cone (~8,000 to 9000 ft or ~2,400 to 2700 m above sea level). These clouds typically were confined to the summit caldera, but could pose a hazard to people and low-flying aircraft in the immediate vicinity of the active cone. We expect that steam and ash emissions may continue intermittently, but this does not indicate that more vigorous activity is imminent or even likely.

• Current Level of Concern Color Code: YELLOW

  Unrest continues at Mount Veniaminof volcano and is characterized by small, intermittent ash emissions, low-level volcanic tremor, and small volcanic earthquakes. During this past week, small ash emissions were observed during periods of clear weather on April 25 and 28. Ash clouds rose from 1,000 to 3,000 feet above the active cone (~8,000 to 10,000 feet or ~2,400 to 3,050 m above sea level), and during times of strong winds were observed drifting for distances of less than 10 miles (~16 km). Seismic activity has fluctuated, but remains above background levels. However, there are no indications that more vigorous activity is imminent or even likely. We expect that steam and ash emissions similar to those observed this week may continue intermittently and could pose a hazard to people and low-flying aircraft in the vicinity of the active cone.

• Current Level of Concern Color Code: YELLOW

  Unrest continues at Mount Veniaminof volcano, characterized by small, intermittent ash emissions, low-level volcanic tremor, and small volcanic earthquakes. During this past week, small ash emissions were observed during periods of clear weather on May 1-3. Ash clouds rose from 1,000 to 2,000 feet above the active cone (~8,000 to 9,000 feet or ~2,400 to 2,800 m above sea level). The internet camera system in Perryville was brought down for repair on May 4, so no systematic visual observations of ash plumes were made after that time, though residents reported continued activity on May 5. However, the observed seismicity is similar to that recorded last week, suggesting that the ash burst activity continues. Satellite imagery shows ash deposits on the snow to distances of 5 miles (~8 km) from the vent. A pilot reported ash as far as 20 miles (33 km) from the cone. There are no indications that more vigorous activity is imminent or even likely. We expect that steam and ash emissions similar to those observed this week may continue intermittently and could pose a hazard to people and low-flying aircraft in the vicinity of the active cone.

• Current Level of Concern Color Code: YELLOW

  Unrest continues at Mount Veniaminof volcano, characterized by intermittent, low-level volcanic tremor, and small volcanic earthquakes. We have no evidence of ash emissions during the past week. Cloudy conditions have obscured observation of Veniaminof by satellite, and the internet camera system in Perryville is still down for repair. Over the past week, seismic activity was more intermittent and lower in amplitude than it was in previous weeks; however, seismicity suggests that ash burst activity may occasionally occur. There are no indications that more vigorous activity is imminent or even likely. However activity at Veniaminof could increase rapidly, and steam and ash emissions may pose a hazard to people and low-flying aircraft in the vicinity of the active cone.

• Current Level of Concern Color Code: YELLOW

  Unrest continues at Mount Veniaminof volcano, characterized by moderate levels of intermittent volcanic tremor. These data are similar to the seismic signals recorded in association with small ash bursts on April 25 and 28 and May 1-3. A pilot report this morning indicated the presence of an ash plume rising to 1000-3000 ft (300-900 m) above the volcano's summit (8000-10,000 ft or 2400-3000 m above sea level ) and extending approximately 20 miles northeast. Cloudy conditions have obscured observation of Veniaminof by satellite, and the internet camera system in Perryville remains inoperative. There are no indications that more vigorous activity is imminent or even likely. However activity at Veniaminof could increase rapidly, and steam and ash emissions may pose a hazard to people and low-flying aircraft in the vicinity of the active cone.

• Current Level of Concern Color Code: YELLOW

  Unrest continues at Mount Veniaminof volcano, characterized by intermittent volcanic tremor. These data are similar to the seismic signals recorded last month in association with small ash plumes, suggesting that ash bursts continue. A pilot report on May 18 indicated the presence of an ash plume rising to heights of 1000-3000 ft (300-900 m) above the volcano's summit (8000-10,000 ft or 2400-3000 m above sea level) and extending approximately 20 miles (32 km) northeast. Cloudy conditions have obscured observation of Veniaminof by satellite. There are no indications that more vigorous activity is imminent or even likely. However, activity at Veniaminof could increase rapidly, and steam and ash emissions may pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Bursts of volcanic tremor continue at Mount Veniaminof. In general, the amount of activity is lower than that recorded last week, but sequences of tremor accompanying ash bursts continue to be observed. The web camera in Perryville has been repaired and images can be viewed at http://www.avo.alaska.edu/avo4/ atlas/volc/venia/veni2004/index.htm. Clear views of the volcano on May 26 showed weak steaming and low ash bursts emanating from the intracaldera cone. Most of these bursts did not rise higher than the active cone (2156 m or 7073 ft above sea level). Satellite data acquired on May 26 showed ash deposits in the north and southeastern portions of the caldera. There are no indications that more vigorous activity is imminent or even likely. However, activity at Veniaminof could increase rapidly, and steam and ash emissions may pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Bursts of volcanic tremor continue at Mount Veniaminof. The only significant ash emissions observed this past week occurred the evening of May 30 into the morning of May 31. These were observed using the web camera in Perryville ( http://www.avo.alaska.edu/avo4/atlas/volc/venia/veni2004/index.htm). None appear to have exceeded 10,000 ft. (3000 m) above sea level. Clear views of the volcano by the web camera earlier on May 30 showed steaming from near the base of the intracaldera cone that rarely rose above the top of the cone (7073 ft. or 2156 m above sea level). No activity was observed in satellite data as the volcano was largely obscured by clouds. There are no indications that more vigorous activity is imminent or even likely. However, activity at Veniaminof could increase rapidly, and steam and ash emissions may pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Bursts of volcanic tremor continue at Mount Veniaminof. Since clouds obscured the volcano most of the week, the only ash emissions observed this past week occurred the evening of June 11. These were observed using the web camera in Perryville. None appear to have exceeded 10,000 ft. (3000 m) above sea level. No activity was observed in satellite data as the volcano was largely obscured by clouds. There are no indications that more vigorous activity is imminent or even likely. However, activity at Veniaminof could increase rapidly, and steam and ash emissions may pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Bursts of volcanic tremor continue intermittently at Mount Veniaminof. These bursts could be indicative of small, low-level ash emissions. On June 16 at 23:50, a pilot observed an ash cloud that rose about 8700 feet ASL. This ash cloud was also observed in satellite imagery. No other activity was observed in satellite data or the web cam, as the volcano was largely obscured by clouds. There are no indications that more vigorous activity is imminent or even likely. However, activity at Veniaminof could increase rapidly, and steam and ash emissions may pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Bursts of volcanic tremor continue intermittently at Mount Veniaminof. These bursts could possibly be indicative of small, low-level ash emissions. However, no activity was observed in satellite data or the web cam this week. The volcano was largely obscured by clouds. Activity at Veniaminof could increase rapidly, and steam and ash emissions may pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Short intervals of volcanic tremor continue intermittently at Mount Veniaminof. The episodes of tremor could be indicative of small, low level, ash and steam emissions. Observations made by AVO during an aerial overflight of the active cone on Sunday, June 27 indicated small amounts of dark ash on the surface of the snow within the ice-filled caldera. The ash, although apparently thin, covered most of the snow surface inside the caldera. Cloudy conditions prohibited views of the active cone in satellite images obtained throughout the week. Occasional views of the active cone were possible this week with the web camera; however, no specific activity was observed. Conditions at Veniaminof could change rapidly and activity could become more vigorous without warning. Steam and ash emissions could pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Short intervals of low-level volcanic tremor continue intermittently at Mount Veniaminof. The episodes of tremor likely indicate small, low level, ash and steam emissions. Though satellites had clear views of the volcano most the week, no volcanic activity was observed in their data. Web camera views have been clear since Monday and have shown intermittent puffing of what appears to be mixed ash and steam. Tremor bursts correlate with these puffing events. Pilot reports supported by web camera images indicate ash clouds approaching 10,000 ft ASL on Thursday. Conditions at Veniaminof could change rapidly and activity could become more vigorous without warning. Steam and ash emissions could pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Short intervals of low-level volcanic tremor continue intermittently at Mount Veniaminof. The episodes of tremor likely indicate small, low level, ash and steam emissions. Though most observed events failed to reach 10,000 ft above sea level (3000 m), several unobserved events may have reached as high as 12,000 ft. (3600 m). Clouds obscured the satellite views over the volcano most of the week and the web camera views have been cloudy since Tuesday. However, brief clear web camera views earlier this week showed intermittent puffing of what appears to be mixed ash and steam which correlate with tremor bursts. Conditions at Veniaminof could change rapidly and activity could become more vigorous without warning. Steam and ash emissions could pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Small steam and ash emissions accompanied by periods of volcanic tremor continue intermittently at Mount Veniaminof Volcano. On July 22, an AVO field crew witnessed a small ash burst rising only a few hundred meters (> 1000 feet) above the summit of the intracaldera cone at 12:29 ADT. This type of activity is likely typical of the ash emissions at Veniaminof either observed or inferred on the basis of seismicity over the past three months. During periods of repose, the cone is producing variable amounts of white steam from at least two separate craters near the top of the cone. The surface of the snow and ice field throughout much of the caldera is covered with a discontinuous, 1-2-mm thick ash blanket. AVO geologists reported no ballistics (large rocks) beyond the limits of the cone, nor did they observe cracks or other changes in the ice that would indicate subglacial melting. Satellite views of the volcano were obscured by clouds for much of the week. Occasional web camera views of the caldera through breaks in the clouds showed steam emanating from the summit cone.

  Though the observed ash emission of July 22 failed to reach 10,000 ft (3000 m) above sea level, activity at Veniaminof could become more vigorous without warning, and continuing steam and ash emissions do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Episodes of volcanic tremor continue intermittently at Mount Veniaminof Volcano. No visual observations of ash emissions have been made since July 22, although the observed seismicity is similar to that observed coincident with ash emissions in the past few months. Most such emissions do not reach 10,000 ft. above sea level, though a few have been reported to reach as high as 12,000 ft. Satellite and web camera views of the volcano were obscured by clouds throughout the week. Activity at Veniaminof could become more vigorous without warning, and continuing steam and ash emissions do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Episodes of volcanic tremor continue intermittently at Mount Veniaminof Volcano. No visual observations of ash emissions have been made since July 22, although the observed seismicity is similar to that observed coincident with ash emissions in the past few months. Most such emissions do not extend more than 10,000 ft. (3048 m) above sea level, though a few have been reported to reach as high as 12,000 ft. (3657 m). Satellite views of the volcano were obscured by clouds throughout the week. The intracaldera cone was occasionally visible in the AVO web camera, but only occasional low-level steam plumes were evident. Activity at Veniaminof could become more vigorous without warning, and continuing steam and ash emissions do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Episodes of volcanic tremor continue intermittently at Mount Veniaminof Volcano. Using the web camera in Perryville, we observed frequent small ash and steam emissions throughout the week. These were confirmed by AVO geologists working in the area. These emissions are similar to those observed commonly in the last two months. None extended more than 10,000 ft. (3048 m) above sea level. Satellite views of the volcano were obscured by clouds throughout the week. Activity at Veniaminof could become more vigorous without warning, and continuing steam and ash emissions do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Episodes of volcanic tremor continue intermittently at Mount Veniaminof Volcano. Using the web camera in Perryville, we observed occasional small mixed ash and steam emissions throughout the week. These emissions are similar to those that have been observed over the past two months. None extended more than 8,000-to-10,000 ft. (3048 m) above sea level. Satellite views of the volcano were obscured by clouds throughout the week. Activity at Veniaminof could, at any time, become more vigorous, and the steam and ash emissions from the intracaldera cone do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Low-level seismic tremor and intermittent tremor bursts continue to be recorded at Mount Veniaminof Volcano. Throughout the week, cloudy conditions prevented direct observation of the active cone from satellite views and the web camera in Perryville. Tremor episodes likely represent low-level ash/steam emissions similar to those observed over the past two months. Activity at Veniaminof could, at any time, become more vigorous, and the steam and ash emissions from the intracaldera cone do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Low-level seismic tremor and intermittent tremor bursts continue to be recorded at Mount Veniaminof Volcano. Tremor episodes likely represent low-level ash and steam emissions similar to those observed over the past two months. Minor emissions of volcanic ash and steam were occasionally observed using web camera images during times of clear weather. Activity at Veniaminof could, at any time, become more vigorous, and the steam and ash emissions from the intracaldera cone do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Low-level seismic tremor and intermittent tremor bursts continue to be recorded at Mount Veniaminof Volcano. Tremor episodes likely represent low-level ash and steam emissions similar to those observed over the past four months. Minor emissions of volcanic ash and steam were occasionally observed using web camera images during times of clear weather. Activity at Veniaminof could, at any time, become more vigorous, and the steam and ash emissions from the intracaldera cone do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Low-level seismic tremor and intermittent tremor bursts continue to be recorded at Mount Veniaminof Volcano. Tremor episodes likely represent low-level ash and steam emissions similar to those observed over the past four months. Minor emissions of volcanic ash and steam were occasionally observed using web camera images during times of clear weather. Activity at Veniaminof could, at any time, become more vigorous, and the steam and ash emissions from the intracaldera cone do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Low-level seismic tremor and intermittent tremor bursts continue to be recorded at Mount Veniaminof Volcano. Tremor episodes likely represent low-level ash and steam emissions similar to those observed over the past four months, although cloudy conditions obscured views of the volcano in web camera and satellite data. Activity at Veniaminof could, at any time, become more vigorous, and the steam and ash emissions from the intracaldera cone do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Low-level seismic tremor and intermittent small tremor bursts may continue at Mount Veniaminof Volcano, where strong winds are buffeting the mountain, however, analysis of seismic records is inconclusive. The winds are strong enough to produce an overshadowing effect on seismic records that could hide evidence of low-level tremor. If they continue, tremor episodes likely represent low-level ash and steam emissions similar to those observed over the past four months, although cloudy conditions obscured views of the volcano in web camera and satellite data. Activity at Veniaminof could, at any time, become more vigorous, and the steam and ash emissions from the intracaldera cone do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Low-level seismic tremor and intermittent small tremor bursts continue at Mount Veniaminof Volcano. These tremor episodes likely represent low-level ash and steam emissions similar to those observed over the past four months, although cloudy conditions obscured views of the volcano in web camera and satellite data. Activity at Veniaminof could, at any time, become more vigorous, and the steam and ash emissions from the intracaldera cone do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Low-level seismic tremor continues at Mount Veniaminof Volcano. The tremor sequences recorded this week correlate with weak steaming of the intracaldera cone as observed in web camera data. No ash emissions were observed, although cloudy conditions over the caldera restricted viewing for much of the week. Activity at Veniaminof could, at any time, become more vigorous, and the steam and ash emissions from the intracaldera cone do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: YELLOW

  Low-level seismic tremor continues at Mount Veniaminof Volcano. No ash or steam emissions were observed, although cloudy conditions over the caldera restricted viewing for much of the week. Activity at Veniaminof could, at any time, become more vigorous, and the steam and ash emissions from the intracaldera cone do pose a hazard to people and low-flying aircraft in the vicinity of the caldera.

• Current Level of Concern Color Code: GREEN
  Previous Level of Concern Color Code: YELLOW

  AVO is lowering the Level of Concern Color Code for Mount Veniaminof Volcano from Yellow to Green. Seismicity associated with ash emissions seen this past summer has decreased to a level that no longer indicates ash, ash-steam, or steam emissions are occurring on a regular basis. Since early September, we have observed no ash emissions in web camera views of the intracaldera cone nor have we seen evidence of ash emissions in satellite data. AVO has received no recent reports of ash from either pilots or ground observers. We consider the intermittent, low-level seismic tremor that continues to be recorded at Veniaminof to be part of the current background activity at the volcano. Steaming from the intracaldera cone, possibly associated with very minor ash emissions, may still occur. AVO continues to monitor Mount Veniaminof for significant changes in activity.