(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) | |
(2) Issued: | (20181212/2121Z) |
(3) Volcano: | Cleveland (VNUM #311240) |
(4) Current Color Code: | ORANGE |
(5) Previous Color Code: | YELLOW |
(6) Source: | Alaska Volcano Observatory |
(7) Notice Number: | |
(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: | Local seismic sensors recorded a small explosion today at 20:53 UTC (11:53 AKST). No ash cloud has yet been detected in satellite imagery. No other significant activity was detected. Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. Cleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. |
(12) Volcanic cloud height: | Not known |
(13) Other volcanic cloud information: | n/a |
(14) Remarks: | |
(15) Contacts: | Michelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497 Pavel Izbekov, Acting Coordinating Scientist, UAFGI peizbekov@alaska.edu (907) 322-4085 |
(16) Next Notice: |
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