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 Bogoslof volcano news & activity updates:
Mi, 30. Aug 2017, 13:30
Mo, 28. Aug 2017, 20:15
Mo, 28. Aug 2017, 00:15
So, 27. Aug 2017, 01:30
Di, 8. Aug 2017, 18:44
The Alaska Volcano Observatory reports that "no further ash emissions have occurred since the 3-hour-long eruption on Monday, 7 August that began around 10:00 AKST (18:00 UTC), and seismicity remains low. Read more..."We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. Additional ash-producing eruptions could occur at any time, however, with no detectable precursors." (AVO) [ less] Di, 8. Aug 2017, 15:35
Seismic signal of yesterday's eruption at Bogoslof (recorded on MSW station on Makushin volcano about 60 km to the E (AVO) After a period of 4 weeks of calm, another strong explosive eruption occurred last night at the volcano, generating an ash plume that rose to estimated 32,000 ft (10 km) altitude. Read more...The eruption began at about 18:00 UTC (10:00 AKDT local time) and was observed by a pilot. It lasted approximately 3 hours. The volcano's Aviation Color Code was again raised to RED. [ less]
Mo, 7. Aug 2017, 19:30
Di, 11. Jul 2017, 02:15
Mo, 10. Jul 2017, 15:05
Seismic signal of this morning's eruptions at Bogoslof (recorded on MSW station on Makushin volcano about 60 km to the E (AVO) The volcano remains very active with intermittent short-lived, but strong explosive eruptions every few days, something that has now been going on for more than 6 months. Read more...Another pulse of activity occurred this morning, after a pause of 2 days: a first explosion occurred at 07:47 UTC on July 9 (23:47 local time on July 9) and lasted about 5 minutes, followed 15 minutes later by a second explosion that lasted about 7 minutes. The Alaska Volcano Observatory (AVO) detected a small ash cloud that drifted southeast, at up to 30,000 ft altitude (9 km). The Aviation Color Code of Bogoslof was again raised to RED and the Volcano Alert Level to WARNING. [ less] Mo, 10. Jul 2017, 09:00
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Sa, 8. Jul 2017, 19:15
Sa, 8. Jul 2017, 12:05
Two short explosive eruptions took place on 8 July morning at 10:15 and 10:29 local time (18:15 and 18:29 UTC). An ash plume rising up to 30,000 ft was estimated that drifted north. The Aviation Color Code was again increased to Red and the Alert Level to Warning. Read more...Seismic data decreased following these two eruption pulses, but additional explosive activity is possible, the Alaska Volcano Observatory wrote. [ less] Mi, 5. Jul 2017, 11:37
Two significant explosive eruptions occurred at the volcano yesterday afternoon / evening: the first at 16:51 local time (00:51 July 5 UTC), followed by another one at 19:07 AKDT (03:07). Read more...Ash plumes from the explosions reached up to 32,000 ft (10 km) altitude and drifted southeast. The Aviation Color Code/Alert Level of Bogoslof was raised to RED/WARNING. [ less] Mi, 5. Jul 2017, 01:45
Mo, 3. Jul 2017, 08:33
Ash plume and ash fall forecast for Bogoslof's eruption last night (image: AVO) Another short-lived, but large explosive eruption occurred yesterday night (20:48 UTC or 12:48 AKDT local time on 2 July). The ash plume rose to approx. 36,000 ft (12 km) altitude and drifted east. Read more...The Aviation Color Code was again raised to RED. Since the eruption, the volcano has remained calm again. [ less] So, 2. Jul 2017, 21:45
Di, 27. Jun 2017, 18:11
3 days since the eruption early Saturday, another large explosion occurred at the volcano this morning. Read more...It started at 11:17 UTC (03:17 AKDT) and lasted roughly 14 minutes and produced a steam and ash plume that rose to 30,000 ft (10 km) altitude and drifted NE. The Alaska Volcano Observatory (AVO) issued a warning to aviation and raised the Aviation Color Code again to RED and the Volcano Alert Level to WARNING. [ less] Di, 27. Jun 2017, 18:00
Di, 27. Jun 2017, 02:00
Sa, 24. Jun 2017, 17:15
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Sa, 24. Jun 2017, 08:45
Seismic signal of this morning's eruptions at Bogoslof (recorded on MSW station on Makushin volcano about 60 km to the E (AVO) After a calmer period of approx. 10 days, another significant and quite large explosive eruption occurred at the volcano earlier today (yesterday afternoon local time). Read more...The main pulse of the eruption which lasted about 10 minutes began at 00:49 UTC (16:49 local time) this morning and generated an ash and steam plume that quickly rose to 36,000 ft (12 km) altitude as pilots reported that were en route in the area and saw the cloud. The ash plume moved east, passing over Akutan and the North Pacific Ocean before dissipating. No ash falls were reported from ground locations. 
Model an ash plume from Bogoslof as of this morning (AVO) [ less] Sa, 24. Jun 2017, 01:15
Di, 13. Jun 2017, 08:44
Photo of Bogoslof Island, June 11, 2017. Photo taken from an Alaska Airlines jet enroute to Adak (image: Cyrus Read, USGS/AVO) After a pause about approx. 2 days with little detected activity since the large explosion on 10 June, a new series of relatively strong explosions began early today at 1:47 UTC 13 June (17:47 local time AKDT June 12). At least two larger pulses of activity occurred, each lasting 10-30 minutes and producing ash plumes up to 25,000 ft (7.5 km) altitude that dissipated within 30 minutes. Read more...According to the Alaska Volcano Observatory (AVO), the last such episode of explosive activity ended at 04:35 UTC this morning (20:35 AKDT June 12). The ash from the latest eruptions is drifting SE toward Unalaska Island where minor ash fall could occur. [ less] Di, 13. Jun 2017, 02:30
So, 11. Jun 2017, 19:45
So, 11. Jun 2017, 12:05
An explosive eruption occurred from about 3:18 to 5:28 local time AKDT (11:18 to 13:28 UTC) on 10 June. This sequence began with a series of short infrasound signals and then, starting at about 4:16 AKDT (12:16 UTC), transitioned into several minutes-long continuous seismic and infrasound tremor signals. Read more...Satellite images of the resulting cloud show it reached as high as 34,000 ft asl and drifted to the northwest. Satellite data also indicate that at least part of the volcanic cloud was more ash-rich than most of those seen previously in the Bogoslof eruptive sequence to date. This suggests that the eruption may have destroyed the lava dome that was emplaced earlier this week. Since 5:28 AKDT (13:28 UTC), seismicity as detected on neighboring islands has been quiet, no lightning has been detected, and satellite images show no additional emission from the volcano. [ less] So, 11. Jun 2017, 02:15
Sa, 10. Jun 2017, 13:15
Do, 8. Jun 2017, 07:26
Two smaller explosive eruptions, each lasting no more than 2 minutes, occurred earlier today and yesterday (at 5:28 UTC on 8 June or 21:28 AKDT on 7 June, and 14:30 UTC / 6:30 am AKDT yesterday). Small ash and steam clouds were produced tht rose less than 10,000 ft (3 km). Read more...The Alaska Volcano Observatory (AVO) reported yesterday evening that "a new lava dome has been observed in satellite data... It is located in the northern portion of the vent lagoon, has breached sea level, and is about 110 m across. "A robust steam plume is visible in satellite data, and at 2250 UTC (14:50 AKDT) extended for 75 km to the south over the western end of Unalaska Island at an estimated altitude of less than 10,000 ft asl. [ less] Do, 8. Jun 2017, 06:30
Mo, 5. Jun 2017, 17:18
Seismic signal of this afternoon's eruption at Bogoslof (recorded on MSW station on Makushin volcano about 60 km to the E (AVO) The volcano remains restless. During the past days, at least two smaller explosive eruptions occurred. The Aviation Color Code remains at ORANGE. Read more...The latest was an hour ago at 15:50 UTC (7:50 am AKDT local time) and lasted only 2 minutes. It produced a small volcanic cloud that was observed by a pilot and estimated to have reached 20,000 ft elevation. A similar smaller explosion was recorded at 02:42 UTC on 1 June. [ less] Do, 1. Jun 2017, 04:45
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