Magnitude 4.4 Earthquake Strikes Fukuoka on August 18, No Damage Reported

A magnitude 4.4 earthquake struck Fukuoka Prefecture on August 17 at 6:37 a.m., with maximum seismic intensity of 4 recorded in Itoshima City. The Japan Meteorological Agency confirmed the epicenter lay 10 kilometers deep in the Fukuoka region. No injuries, damage, or tsunami threat occurred. Residents initially wondered if the quake was linked to July’s magnitude 7 Kumamoto earthquake, but seismic experts quickly dismissed that possibility.

Where the earthquake hit and how strong it was

The earthquake struck at 6:37 a.m. on August 17 with a magnitude of 4.4 and depth of 10 kilometers. Itoshima City recorded the highest seismic intensity at level 4, meaning the shaking could be clearly felt indoors with hanging objects and windows rattling. Fukuoka City’s Nishi Ward and Karatsu City in Saga Prefecture recorded intensity 3, while Fukuoka City’s Chuo Ward and surrounding areas experienced intensity 2. No injuries or building damage was confirmed.

The Manago-Arayatoge fault near the epicenter

Experts identified the Manago-Arayatoge fault in the vicinity of the epicenter. This fault line runs through the Itoshima Peninsula. The region experienced a magnitude 6.0 earthquake on August 10, 1898, but seismic specialists found no direct connection between that historical event and the current quake.

No link to Kumamoto’s devastating July earthquake

Kyushu University’s Earthquake and Volcano Observation Center Director Satoshi Matsumoto stated that the Kumamoto earthquake fault lay too far away to have triggered Fukuoka’s quake. “The fault is at considerable distance, so there is no direct force from the fault movement,” Matsumoto said. He added that earthquakes of this magnitude occur periodically in the region and are not unusual. Matsumoto urged residents to maintain earthquake preparedness, noting that large earthquakes can strike without warning.

Residents react to the morning tremor

Street interviews captured residents’ surprise at the intensity and proximity of the epicenter. One person said they felt a sudden loud noise while walking and grabbed a nearby fence for stability. Another noted the shaking was strong enough to make them wonder if trains would stop running. Many residents initially suspected the quake was an aftershock from Kumamoto’s July disaster, only to learn that Itoshima was the actual epicenter.

Final Thoughts

The magnitude 4.4 Fukuoka earthquake on August 17 caused no injuries or damage despite intensity 4 shaking in Itoshima City. Experts ruled out any connection to July’s Kumamoto quake, confirming the event as a separate, localized occurrence typical for the region.

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