Last 7 Days of Cap Messages from the Alaska Volcano Observatory http://www.avo.alaska.edu/ Alaska Volcano Observatory Tue, 19 Aug 2008 20:27:42 +0000 Seismic activity at Kasatochi continues to be detected by the AVO seismic network on Great Sitkin Island 25 miles to the west. Clear satellite views yesterday showed a steam plume from the volcano's summit. http://www.avo.alaska.edu/caps/cap.php?id=2993 Partly cloudy satellite views over the past day show a weak thermal anomaly at Cleveland volcano. No plume has been observed. http://www.avo.alaska.edu/caps/cap.php?id=2994 Eruptive activity continues at Okmok Volcano. Low-level ash emissions have been observed in satellite data at Okmok though most of the past 24 hours. However, since 14:30 UTC today the level of seismic activity has gradually decreased to near pre-eruption levels. Satellite data show that ash is no longer being emitted since seismicity levels decreased. http://www.avo.alaska.edu/caps/cap.php?id=2995 Seismic activity at Kasatochi continues to be detected by the AVO seismic network on Great Sitkin Island 25 miles to the west. Clouds have obscured the volcano in satellite views. No plumes have been observed, but people on Adak reported smelling sulfur Sunday afternoon. http://www.avo.alaska.edu/caps/cap.php?id=2990 Clouds have obscured the volcano in satellite views. No plumes or other observations of activity have been reported. http://www.avo.alaska.edu/caps/cap.php?id=2991 Eruptive activity continues at Okmok Volcano. The seismic intensity and tremor duration are still above background levels. Satellite data from the past 12 hours indicates small ash emissions have occurred intermittently and are drifting generally to the south and not reaching higher than 10,000 to 15,000 feet. http://www.avo.alaska.edu/caps/cap.php?id=2992 Seismic activity at Kasatochi continues to be detected by the AVO seismic network on Great Sitkin Island 25 miles to the west. Clouds have obscured the volcano in satellite views. No plumes have been reported. http://www.avo.alaska.edu/caps/cap.php?id=2987 Clouds have obscured the volcano in satellite views. No plumes have been reported. http://www.avo.alaska.edu/caps/cap.php?id=2988 Eruptive activity continues at Okmok Volcano. The seismic intensity and tremor duration are still above background levels suggesting that minor ash and steam emissions are still occurring. http://www.avo.alaska.edu/caps/cap.php?id=2989 Seismic activity at Kasatochi is still being detected by the AVO seismic network on Great Sitkin Island 25 miles to the west. Clouds have obscured the volcano in satellite views. No plumes have been reported. http://www.avo.alaska.edu/caps/cap.php?id=2984 Clouds have obscured Cleveland from satellite views. There have been no reports of activity. http://www.avo.alaska.edu/caps/cap.php?id=2985 Eruptive activity continues at Okmok Volcano. The seismic intensity and tremor duration are still above background levels suggesting that minor ash and steam emissions are still occurring. http://www.avo.alaska.edu/caps/cap.php?id=2986 Eruptive activity at Kasatochi volcano has declined gradually over the past week. Seismic activity is still being detected by the AVO seismic network on Great Sitkin Island 25 miles to the west and the volcano remains in a restless condition and is still considered hazardous to approach. The volcanic ash cloud produced by the eruption last week has dissipated and is no longer detected anywhere over Alaska in satellite data. A volcanic gas and aerosol cloud from the eruption is still present ... http://www.avo.alaska.edu/caps/cap.php?id=2981 Eruptive activity at Cleveland Volcano has occurred throughout the week, although the volcano has been obscured by clouds for a good portion of the week making observations by satellite difficult or impossible. Thermal anomalies at the summit were observed earlier in the week and a small ash plume was observed on the morning of August 12, but nothing has been observed since then. AVO has received no additional information or observations about activity at Cleveland. http://www.avo.alaska.edu/caps/cap.php?id=2982 Eruptive activity continues at Okmok Volcano although the general intensity of the eruption has declined throughout the week. The seismic intensity and tremor duration are still above background levels suggesting that minor ash and steam emissions are still occurring. http://www.avo.alaska.edu/caps/cap.php?id=2983 The remnant volcanic ash cloud from the eruption of Kasatochi volcano last week has dissipated and is no longer detected over southeast Alaska in satellite data. A volcanic gas and aerosol cloud from the eruption persists over parts of North America and the North Atlantic region, but is dispersing and no longer a single cloud. Seismic activity at Kasatochi volcano is still being detected by the AVO seismic network on Great Sitkin Island 25 miles to the west. http://www.avo.alaska.edu/caps/cap.php?id=2978 Volcanic unrest continues at Cleveland volcano. Cloudy conditions in the region have obscured satellite observations today and AVO has received no new information or observations about activity at Cleveland. http://www.avo.alaska.edu/caps/cap.php?id=2979 Eruptive activity continues at Okmok Volcano. The intensity of activity has been declining over the past several days, although the seismic intensity and tremor duration are still above background levels. Cloudy conditions have obscured observations from satellite data. http://www.avo.alaska.edu/caps/cap.php?id=2980 The remnant volcanic ash cloud from the eruption of Kasatochi volcano last week has largely dissipated and is no longer detected over southeast Alaska in satellite data. A volcanic gas and aerosol cloud from the eruption persists over parts of North America. Seismic activity at Kasatochi volcano is still being detected by the AVO seismic network on Great Sitkin Island 25 miles to the west. http://www.avo.alaska.edu/caps/cap.php?id=2975 Volcanic unrest continues at Cleveland volcano. Cloudy conditions in the region have obscured satellite observations today and AVO has received no new information or observations about activity at Cleveland. http://www.avo.alaska.edu/caps/cap.php?id=2976 Eruptive activity continues at Okmok Volcano. The intensity of activity has been declining over the past day to some of the lowest levels seen during the eruption, although the seismic intensity and tremor duration are still above background levels. Cloudy conditions have obscured observations from satellite data. http://www.avo.alaska.edu/caps/cap.php?id=2977 The remnant volcanic ash cloud from the eruption of Kasatochi volcano last week has largely dissipated and is no longer detected over southeast Alaska in satellite data. A volcanic gas and aerosol cloud from the eruption persists over parts of North America. Seismic activity at Kasatochi volcano is still being detected by the AVO seismic network on Great Sitkin Island 25 miles to the west. http://www.avo.alaska.edu/caps/cap.php?id=2972 Volcanic unrest continues at Cleveland volcano. Cloudy conditions in the region have prohibited satellite observations today and AVO has received no new information or observations about activity at Cleveland. http://www.avo.alaska.edu/caps/cap.php?id=2973 Eruptive activity continues at Okmok Volcano. The intensity of activity has been relatively steady over the past day. A weak low-level ash cloud was observed in satellite data this morning, but likely did not extend more than 15,000 feet above the volcano. http://www.avo.alaska.edu/caps/cap.php?id=2974 The remnant volcanic ash plume from the eruption of Kasatochi last week has not dissipated and is forecast by National Weather Service to move over southeast Alaska. The ash-gas cloud will remain suspended at higher altitudes and no ash fall is expected to occur at ground levels. http://www.avo.alaska.edu/caps/cap.php?id=2971 Satellite data from this morning indicate that Cleveland volcano erupted a small ash plume to about 25,000 feet. As of about 11:00 AM AKDT the plume had drifted southwest about 60 miles (100 km) and appears to be dissipating. A pilot in the region reported no obvious ash emissions at the volcano at about 10:00 AM AKDT this morning. http://www.avo.alaska.edu/caps/cap.php?id=2968 Seismic activity at Kasatochi is still being detected by the AVO seismic network on nearby Great Sitkin Island. No ash emissions have been observed in satellite data for several days and AVO has received no pilot reports of ash clouds. http://www.avo.alaska.edu/caps/cap.php?id=2969 Eruptive activity continues at Okmok Volcano. The intensity of activity has been variable over the past day. No ash clouds have been observed in satellite data, but a pilot report this morning indicated an ash plume to 15,000 feet. An observer in Nikolski, west of the volcano, also reported seeing an ash plume above the volcano yesterday. http://www.avo.alaska.edu/caps/cap.php?id=2970