Hazard Notification System (HANS) for Volcanoes
NORTHERN MARIANA ISLANDS VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Wednesday, March 15, 2023, 6:44 AM ChST (Tuesday, March 14, 2023, 20:44 UTC)
Report prepared by the U.S. Geological Survey.
AHYI SEAMOUNT VOLCANO (VNUM #284141)
20°25'12" N 145°1'48" E, Summit Elevation -259 ft (-79 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW
Hydroacoustic signals from roughly the direction of Ahyi Seamount that had been detected nearly continuously over the weekend stopped abruptly yesterday, and no new detections have been observed today. No activity was observed in satellite data.
There are no local monitoring stations near Ahyi Seamount, which limits our ability to detect and characterize volcanic unrest there. We will continue to monitor available remote hydrophonic, seismic, and satellite data closely.
For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://volcanoes.usgs.gov/activity/alertsystem/index.php
SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/
CNMI Homeland Security and Emergency Management
USGS Northern Mariana Duty Scientist (907) 786-7497
Satellite information, Washington VAAC