(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:20140426/1841Z
(3) Volcano:Ahyi (VNUM #284141)
(4) Current Color Code:YELLOW
(5) Previous Color Code:unassigned
(6) Source:U.S. Geological Survey
(7) Notice Number:2014/N1
(8) Volcano Location:N 20 deg 25 min E 145 deg 1 min
(9) Area:Mariana Islands
(10) Summit Elevation:-449 ft (-137 m)
(11) Volcanic Activity Summary:Starting at 06:35 24 April ChST (20:35 23 April UTC), seismic stations on Pagan, Sarigan, Anatahan and Saipan began recording signals believed to be from an undersea volcanic source. Hydroacoustic sensors on Wake Island suggest that the source of this seismic activity is at or near Ahyi seamount. We cannot locate precisely the source of the activity and it is possible that the vent is one of the other volcanic seamounts in the area.

Seismic activity is ongoing at this time. Satellite images show nothing out of the ordinary and we have received no reports of activity at the ocean's surface.
(12) Volcanic cloud height:Unknown
(13) Other volcanic cloud information:Unknown
(14) Contacts:
(15) Next Notice: