USGS Volcano Notice - DOI-USGS-NMI-2026-06-10T18:40:26+00:00

NORTHERN MARIANA ISLANDS INFORMATION STATEMENT
U.S. Geological Survey
Friday, June 12, 2026, 6:01 AM ChST (Thursday, June 11, 2026, 20:01 UTC)

Report prepared by the U.S. Geological Survey.

Northern Mariana Islands Volcano Observatory

Summary: Data feeds from seismic and acoustic sensors on Saipan are restored.

Data feeds from seismic and acoustic sensors on the island of Saipan were restored in late May. These data streams had been unavailable due to infrastructure damage on Saipan following typhoon Sinaku in mid April. The USGS monitors these sensors as well as satellite images, distant hydroacoustic sensors and regional seismic sensors to detect significant volcanic activity in the CNMI. This level of monitoring can detect volcanic activity but cannot provide advance warning of eruptions.

Due to a lack of geophysical monitoring on any of the volcanic islands, the following volcanoes have alert levels of UNASSIGNED: Anatahan, Sarigan, Farallon de Pajaros, Supply Reef, Maug, Asuncion, Agrigan, Pagan, Almagan, and Guguan.

For definitions of Aviation Color Codes and Volcano Alert Levels: https://www.usgs.gov/programs/VHP/volcanic-alert-levels-characterize-conditions-us-volcanoes

SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/

CONTACT INFORMATION:

CNMI Homeland Security and Emergency Management
https://opd.gov.mp/library/agency/homeland-security-and-emergency-management.html

USGS Northern Mariana Duty Scientist (907) 786-7497
http://volcano.wr.usgs.gov/cnmistatus.php

Satellite information, Washington VAAC
http://www.ssd.noaa.gov/VAAC/washington.html