A massive earthquake struck the southern Philippines on Monday, June 8 (local time), prompting tsunami warnings and advisories across parts of the Pacific region. According to the US Geological Survey (USGS), the earthquake measured a magnitude of 7.8 and occurred off Mindanao island at a depth of 39 miles (63 kilometers). The quake was recorded at latitude 5.7° N and longitude 125.2° E, with an origin time of 5:07:43 AM on June 8, 2026.The US Tsunami Warning System, along with Philippine and Indonesian authorities, issued tsunami alerts following the seismic event. The Philippine Institute of Volcanology and Seismology (Phivolcs) measured the earthquake at magnitude 7.0 and warned of potential damage and tsunami waves exceeding one meter that could persist for several hours.Indonesia's Meteorology, Climatology, and Geophysics Agency (BMKG) estimated the quake's magnitude at 7.7, while an initial assessment by the German Research Centre for Geosciences (GFZ) placed it at magnitude 8.2, according to Reuters.The US National Tsunami Warning Center later reported that the USGS had revised the earthquake's magnitude to 7.8.— NWS_NTWC (@NWS_NTWC) In an earlier update, the agency stated: "From the National Tsunami Warning Center: NO tsunami, NO danger to the U.S. Continental coast from this earthquake. Duty Scientists analyzed the event at 1538AKDT Jun 07: M8.2 in Mindanao, Philippine Islands A Tsunami Information Statement is posted: tsunami.gov."According to the latest information from tsunami.gov, tsunami waves of 1 to 3 metres are possible along parts of the Philippines. The advisory, issued at 6:02:56 AM, also forecast waves between 0.3 and 1 metre for Malaysia. A separate tsunami advisory was issued for Guam and the Commonwealth of the Northern Mariana Islands (CNMI) at 6:09:46 AM.Meanwhile, a police chief in Sarangani province (Philippines) described the quake's intensity, telling Reuters news agency it was the "strongest earthquake we've experienced".