(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) | |
(2) Issued: | (20100910/1842Z) |
(3) Volcano: | Cleveland (VNUM #311240) |
(4) Current Color Code: | UNASSIGNED |
(5) Previous Color Code: | YELLOW |
(6) Source: | Alaska Volcano Observatory |
(7) Notice Number: | 2010/A7 |
(8) Volcano Location: | N 52 deg 49 min W 169 deg 56 min |
(9) Area: | Aleutians |
(10) Summit Elevation: | 5676 ft (1730 m) |
(11) Volcanic Activity Summary: | Several clear-weather satellite views of Cleveland from September 7 and 8 reveal no thermal anomaly nor recent deposits. The last observed thermal anomaly was on September 1. AVO is therefore moving the volcano alert level/aviation color code from Advisory/Yellow to UNASSIGNED. Without a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions with ash clouds that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery for hours. Low-level ash emissions at Cleveland occur frequently and do not necessarily mean a larger eruption is imminent. AVO continues to monitor the volcano using satellite imagery. |
(12) Volcanic cloud height: | Unknown |
(13) Other volcanic cloud information: | Unknown |
(14) Remarks: | |
(15) Contacts: | Chris Waythomas, Acting Scientist-in-Charge, USGS chris@usgs.gov (907) 786-7497 Steve McNutt, Coordinating Scientist, UAF steve@giseis.alaska.edu (907) 978-5458 |
(16) Next Notice: | A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http://www.avo.alaska.edu |
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