Northern Luzon is still recovering from the strong winds and heavy rains brought by Super Typhoon Uwan (international name Fung-wong), which made landfall over La Union early Monday morning. The storm weakened slightly but continues to pose threats with winds reaching 150 km/h and gusts up to 230 km/h. The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) has issued gale warnings and cautions about possible storm surges for coastal areas.
Filipinos have raised concerns about a potential tsunami after a magnitude 6.9 earthquake struck near Japan's Iwate Prefecture at 5:03 PM on Sunday, as reported by the Japan Meteorological Agency (JMA). This earthquake generated tsunami waves approximately 20 centimeters high that reached the Ofunato and Kuji ports.
The JMA warned that residents should remain vigilant as stronger aftershocks and larger tsunamis could occur in the coming days.
Fortunately, there were no reported injuries or significant structural damage. The JMA continues to monitor the situation for any follow-up tremors or aftershocks and advises people in Iwate Prefecture to stay alert since additional seismic activity may happen without notice.
Despite concerns, experts say a tsunami threat to the Philippines from this earthquake is unlikely. The epicenter was located on Japan's northeastern coast, far from the Philippine Sea, and only undersea earthquakes with a magnitude of 7.5 or greater and shallow depth typically produce tsunamis capable of reaching Philippine shores.
The recent earthquake is not expected to cause tsunami waves in the Philippines.
The last time the Philippines issued a tsunami alert connected to a Japanese earthquake was in 2011 after an 8.9-magnitude quake off Honshu’s coast, which caused waves up to one meter upon reaching the country.
Japan's warning systems successfully contained risks, quickly lifting tsunami advisories after confirming minimal danger. This event revived memories of the 2011 Tohoku earthquake, which had triggered widespread tsunami alerts across the Pacific, including in the Philippines.
Residents near the affected area in Japan and those in the Philippines are advised to heed alerts and stay vigilant. Continuous monitoring by the JMA and the Philippine National Disaster Risk Reduction and Management Council (NDRRMC) is in place to ensure timely warnings for any new developments.
Author's summary: Following Super Typhoon Uwan, the Philippines faces concerns about a tsunami threat after a 6.9 magnitude earthquake in Japan, but experts affirm the risk to Philippine shores remains low.