The U.S. Geological Survey recorded an earthquake with a preliminary magnitude of 7.4 that occurred 20 km E of Santiago, Philippines, with a depth of 58.1 km, at 11:43 a.m. (ChST).

As advised by the Pacific Tsunami Warning Center, there is no tsunami threat to Guam and the CNMI from this earthquake.  

This will be the final statement issued by GHS/OCD unless additional information is received.

The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory, in effect for Guam until 11:30 a.m. this morning. 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 over the area, resulting in minor flooding.

The community is advised to take the following precautionary actions:.

The Office of Guam Homeland Security and the Office of Civil Defense (OHS-OCD), in collaboration with the University of Arkansas System, successfully hosted a 32-hour, instructor-led Malware Prevention, Discovery, and Recovery (MPDR) course from October 6–9, 2025, at the OHS-OCD facility in Agana Heights.

This timely and impactful training marked the official start of Cybersecurity Awareness Month, reinforcing Guam’s ongoing efforts to strengthen cybersecurity resilience across sectors.

The Office of Homeland Security and the Office of Civil Defense (OHS-OCD), in coordination with the Port Authority of Guam (PAG), will host two Incident Command System (ICS) training opportunities at the PAG Training Room, Piti. The courses follow:

Guam will soon take part in the world’s largest earthquake drill, the Great ShakeOut. On Thursday, October 16, 2025 at 10:16 a.m. (ChST), participants will practice the earthquake response procedure; “Drop, Cover and Hold On” from wherever they are. The drill will last for one minute.

The National Weather Service (NWS) Guam Weather Forecast Office advised that significant impacts are not expected with a tropical disturbance, Invest 95W, as it passes through the Marianas Tuesday. Currently located southeast of Guam near 12N149E, it will continue generally northwestward, passing through the Marianas tomorrow as a weak disturbance. Development of the system, if any, is likely days away and will occur well northwest of our region in the Philippine Sea. 

• If driving, be alert for low visibilities in heavy rain;
• Slow down where water is ponding on the road;

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, October 7, 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.

The Office of Guam Homeland Security and the Office of Civil Defense (OHS-OCD) invite the community to the National Preparedness Month (NPM) Grand Finale on Saturday, September 27, 2025, from 10 a.m. – 2 p.m. at the Agana Shopping Center.

The NPM Grand Finale marks the culmination of National Preparedness Month, observed each September to raise awareness about disaster and emergency readiness. This year’s theme, “Preparedness Starts at Home,” highlights the importance of getting back to the essentials of preparedness.