# Seismic activity and economic impact in Japan > Live situation record from CLSTR: https://clstr.news/situations/seismic-activity-in-japan > Updated: 2026-08-24T18:10:00.000Z. Sources: 30. Developments: 9. Following a devastating 7.1-magnitude earthquake in Kumamoto Prefecture that caused significant infrastructure damage, Japan has experienced continued seismic activity. On August 8, a major earthquake with a seismic intensity of 7 struck Kumamoto, resulting in reports of significant destruction, including collapsed houses, damaged roads, derailed freight trains, and explosions at an Aeon Mall. The death toll from the Kumamoto earthquake has risen to 38 people, including seven victims confirmed at the AEON Mall Kumamoto following the collapse of walls and ceilings. Economic assessments by Teikoku Databank indicate 15.7% of companies nationwide have been affected, with 53.9% in the Kyushu region facing disruptions. These disruptions include production halts in the automotive sector and delays in construction materials. The presence of non-local companies in areas like Kikuyo Town, including TSMC’s semiconductor manufacturing base, suggests potential ripple effects across national supply chains. In response, 84.6% of surveyed companies intend to strengthen disaster prevention measures. Seismic activity has persisted throughout August. On August 17, a magnitude 4.4 earthquake struck the Fukuoka region, reaching intensity level 4 in Itoshima. On August 25, a magnitude 4.3 earthquake occurred off the coast of Iwate Prefecture. On August 27, a magnitude 3.8 earthquake struck the Ashikita region of Kumamoto, reaching intensity 3 in Kamiamakusa City. As Kumamoto marks one month since the major intensity 7 event, recovery efforts involving volunteers and local officials are underway. While repairs to electricity, gas, and water infrastructure are progressing, residents continue to face challenges such as water outages and prolonged evacuation due to ongoing aftershocks. ## Timeline ### 2026-08-24: Earthquake strikes off the coast of Iwate Prefecture, Japan A magnitude 4.3 earthquake struck off the coast of Iwate Prefecture, Japan, on August 25, 2026. Tremors were felt in Iwate, Aomori, and Hokkaido, with no tsunami warning issued. 6 sources. https://clstr.news/cluster/earthquake-strikes-off-the-coast-of-iwate-prefecture-japan ### 2026-08-22: Japan earthquake: 38 dead after 7.1 magnitude tremor hits Kumamoto A 7.1 magnitude earthquake in Kumamoto, Japan, has killed at least 38 people and injured many others, causing significant damage to buildings and disrupting rail services in the Tokyo region. 2 sources. https://clstr.news/cluster/japan-earthquake-38-dead-after-71-magnitude-tremor-hits-kumamoto ### 2026-08-18: Kumamoto earthquake hits Japan with magnitude 3.8 A magnitude 3.8 earthquake struck Kumamoto Prefecture, Japan, on August 19, 2026, reaching a maximum intensity of 3. No tsunami threat was reported. 5 sources. https://clstr.news/cluster/kumamoto-earthquake-hits-japan-with-magnitude-38 ### 2026-08-16: Kumamoto earthquake impacts 15.7% of Japanese companies A Teikoku Databank survey shows 15.7% of companies were affected by the July 2026 Kumamoto earthquake, with over 53% in Kyushu impacted, prompting 84.6% of businesses to review disaster prevention plans. 5 sources. https://clstr.news/cluster/kumamoto-earthquake-impacts-157-of-japanese-companies ### 2026-08-15: Fukuoka earthquake hits northern Kyushu with magnitude 4.4 A magnitude 4.4 earthquake struck Fukuoka, Japan, on August 17, reaching a maximum intensity of 4 in Itoshima. No tsunami risk or major damage has been reported. 9 sources. https://clstr.news/cluster/earthquakes-recorded-in-kumamoto-and-miyagi-regions ### 2026-08-14: Kumamoto earthquake impacts 53.9% of Kyushu companies Following the July 2026 Kumamoto earthquake, 53.9% of companies in Kyushu report impacts such as logistics delays and warehouse damage, prompting 84.6% of firms to enhance disaster preparedness. 5 sources. https://clstr.news/cluster/kumamoto-earthquake-impacts-539-of-kyushu-companies ### 2026-08-08: Kumamoto earthquake hits Japan with intensity 7 A powerful earthquake struck Kumamoto, Japan, recording a seismic intensity of 7 and causing significant structural damage and infrastructure disruption. 2 sources. https://clstr.news/cluster/kumamoto-earthquake-hits-japan-with-intensity-7 ### 2026-08-07: Japan experiences multiple earthquakes in Iwate and Kumamoto Multiple earthquakes struck Japan on August 9, 2026, including a magnitude 5.6 quake near Iwate and a magnitude 4.2 quake in Kumamoto. No tsunami threats were reported. 6 sources. https://clstr.news/cluster/iwate-prefecture-earthquake-magnitude-37-felt-at-intensity-1-no-tsunami-risk ### 2026-08-01: Japan hit by 5.8 magnitude quake in Aomori after Kumamoto tremor A 5.8‑magnitude quake hit Aomori, Japan, with no tsunami warning, following a deadly 7.1 quake in Kumamoto that killed 35 and produced over 170 aftershocks. 2 sources. https://clstr.news/cluster/japan-hit-by-58-magnitude-quake-in-aomori-after-kumamoto-tremor --- Cite as: Seismic activity and economic impact in Japan. CLSTR, https://clstr.news/situations/seismic-activity-in-japan