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On July 28, 2026, a significant earthquake with a magnitude of 7.1 (MJMA) struck near Kumamoto Prefecture, Japan, at approximately 4:27 PM JST ³⁸. The earthquake occurred at a shallow depth of 10 km, with its epicenter located about 5 km east of Uto, Kumamoto ³⁸. The Japan Meteorological Agency (JMA) reported a maximum intensity of 7 on their seismic intensity scale ³⁸.

Key Details of the Event

• Magnitude: The Japan Meteorological Agency (JMA) reported a magnitude of 7.1 (MJMA), while the United States Geological Survey (USGS) recorded it as Mww 6.8 ⁸.
• Location: Near Kumamoto, Kumamoto Prefecture, Japan ³⁸.
• Time: 4:27 PM JST on July 28, 2026 ³⁸.
• Depth: 10 km ³.
• Intensity: Maximum intensity of 7 on the JMA seismic intensity scale ³.

Aftershocks and Broader Seismic Activity

Following the main earthquake, numerous aftershocks were reported. Within the subsequent days, 18 aftershocks with a magnitude greater than 2.5 occurred, with the strongest reaching a magnitude of 5.6 ⁷. Japan is one of the most seismically active regions globally, experiencing frequent earthquakes due to movements within the Earth's crust ⁵⁶. In the past 365 days, Japan has seen 710 earthquakes ¹. Notably, other recent significant quakes include a 7.6 magnitude earthquake in Misawa, Aomori, earlier in 2026, and a 6.8 magnitude event in Uto, Kumamoto, within the past month ¹.

Impact and Consequences

The earthquake had a notable impact on various sectors:

• Automotive Industry: Several major Japanese automotive manufacturers, including Toyota, Nissan, Honda, and Mitsubishi, were affected. The earthquake disrupted manufacturing and supply chain operations, leading to temporary halts in production ⁹. While the impact on aluminum demand was transient, automakers were expected to resume full production within one to two weeks ¹⁰.
• Tsunami Warnings: Tsunami warnings and advisories were issued following the earthquake ³.
• Infrastructure and Economy: While specific details on infrastructure damage or economic losses are still emerging, such events in Japan often lead to temporary disruptions and necessitate recovery efforts ⁹.

This event underscores Japan's ongoing vulnerability to seismic activity and its robust systems for managing and responding to such natural disasters.