Small Earthquake Hits Nagasaki and Kumamoto in Japan
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A minor earthquake struck parts of Nagasaki and Kumamoto prefectures in southwestern Japan early on 28 September 2026, according to the Japan Meteorological Agency (JMA).
The tremor occurred at approximately 6:29 a.m. local time, with the JMA issuing an official report on the event just two minutes later, at 6:31 a.m.
The affected municipalities included Unzen City in Nagasaki Prefecture, along with Kumamoto Misato Town, Itsuki Village, Kuma Village, and Kamiamakusa City in neighbouring Kumamoto Prefecture.
The earthquake registered a maximum seismic intensity of 1, according to the JMA's ranking system.
Japan uses a distinct scale, known as the shindo scale, to measure how strongly an earthquake is felt at specific locations, rather than relying solely on the more internationally recognised magnitude scale, which measures the total energy released at the earthquake's source.
The shindo scale ranges from 0 to 7, with an intensity of 1 representing one of the weakest levels of perceptible shaking, typically noticed only by a small number of people who are indoors and stationary at the time.
No damage, injuries, or disruptions to infrastructure were reported as a result of this earthquake.
The event took place in the Amakusa-Ashikita region of Kumamoto Prefecture, an area that, like much of Japan, lies within a zone of significant tectonic activity due to the country's position along the boundaries of several major tectonic plates.
As a result, Japan experiences thousands of earthquakes annually, the vast majority of which are minor and go largely unnoticed by residents.
The JMA continuously monitors seismic activity across the country and issues rapid public alerts whenever tremors are detected, regardless of their strength, as part of a broader national strategy to maintain public awareness and preparedness.
This particular earthquake appears to have been a routine seismic event, consistent with the frequent low-level tremors that are characteristic of this geologically active part of Japan.
No further developments or follow-up reports have been indicated in connection with this incident.
Vocabulary6 words
- earthquake
- sudden strong shaking of the ground
- Japan Meteorological Agency
- Japan's official group that studies weather and earthquakes
- seismic intensity
- a number showing how strong shaking feels in one place
- shindo scale
- Japan's special scale for measuring felt earthquake shaking
- magnitude
- a number showing the total power of an earthquake
- tectonic activity
- movement of huge rock plates under the earth's surface
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Quiz
Answer key
1. The shindo scale 2. Amakusa-Ashikita 3. False
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Discussion questions
- Why might Japan use a different scale than magnitude to communicate earthquake effects to the public?
- What role does rapid seismic reporting play in disaster preparedness in a country like Japan?
- How does living in a seismically active region shape a country's approach to construction and public policy?
- Do you think minor earthquakes like this one deserve media coverage? Why or why not?
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