(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:(20100531/0746Z)
(3) Volcano:Sarigan (CAVW# 0804-192)
(4) Current Color Code:YELLOW
(5) Previous Color Code:unassigned
(6) Source:Northern Mariana Islands
(7) Notice Number:2010/N3
(8) Volcano Location:N 16 deg 42 min E 145 deg 46 min
(9) Area:Mariana Islands
(10) Summit Elevation:1765 ft (538 m)
(11) Volcanic Activity Summary:Seismicity and subaqueous eruptive activity have declined at Sarigan Volcano prompting reduction of the Aviation Color Code to YELLOW and the Volcanic Activity Level to ADVISORY.

Seismicity at a single nearby station on Sarigan Island declined soon after the eruption of a large steam and ash cloud from a submarine vent 11 km (7 miles) south of Sarigan Volcano early yesterday. Satellite images show no sign of ongoing activity.

An EMO observer aboard an overflight yesterday reported a large area of debris floating in the sea south of the island, and a stationary area of discoloration in the water, presumably above the vent. The crew on Sarigan reported passage of a small wave (less than 0.5 m) following onset of the eruption yesterday.

The USGS continues to monitor the activity with seismic data from stations located on Sarigan and Anatahan, as well as by analysis of satellite images.

Access to the area may be restricted by the CNMI government. Contact the EMO for the latest information, and on status of evacuation of Sarigan and Pagan Islands.
(12) Volcanic cloud height:Unknown
(13) Other volcanic cloud information:Unknown
(14) Contacts:
USGS Northern Marianas Duty Scientist (808) 967-8815
http://volcano.wr.usgs.gov/cnmistatus.php
CNMI Emergency Management Office (670) 322-8001
http://www.cnmiemo.gov.mp/