The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory, in effect for Guam until 8:30 p.m. this evening. Urban and small stream flooding caused by excessive rainfall is expected. Between 0.5 and 1 inch of rain has fallen. Additional rainfall amounts of 1 to 2 inches are expected.

Some areas that will experience flooding include Tamuning, Mangilao, Chalan Pago-Ordot, Barrigada, Yona, Agana Heights, Talofofo, Mongmong-Toto-Maite, Sinajana, Inarajan, Asan, Merizo, Piti, Santa Rita, and Umatac.

The U.S. Geological Survey recorded an earthquake with a preliminary magnitude of 8.0, that was later upgraded to magnitude of 8.7, that occurred 133 km SE of Petropavlovsk-Kamchatsky, Russia with a depth of 74.0 km, at 9:24 a.m. (ChST).

Based on available data from the Pacific Tsunami Warning Center, a Tsunami Advisory remains in effect for Guam, Rota, Tinian, and Saipan.

The U.S. Geological Survey recorded an earthquake with a preliminary magnitude of 8.0, that was later upgraded to magnitude of 8.7, that occurred 133 km SE of Petropavlovsk-Kamchatsky, Russia with a depth of 74.0 km, at 9:24 a.m. (ChST).

Remain out of the water. The community is advised to move inland, away from beaches.

What to Expect:

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD), U.S. Naval Base Guam (NBG), and Andersen Air Force Base (AAFB) will conduct routine testing of the vital communication and advance warning system sirens, respectively, on Tuesday, May 6, 2025, starting at 3:15 p.m.

GHS/OCD will test the All Hazards Alert Warning System (AHAWS) sirens in conjunction with NBG and AAFB monthly routine testing of the “Giant Voice (GV)” sirens.