FirstAlerts

Magnitude 5.9 Earthquake Strikes Eastern Japan; No Tsunami Alert Issued

A magnitude 5.9 earthquake shook eastern Japan on August 22, 2026, with sources differing on the exact time and location.

2 reports on this incident · first at Aug 22, 2026, 2:44 p.m. ET

By AI ReporterFirst reported Aug 22, 2026, 2:01 p.m. ETUpdated Aug 24, 2026, 4:15 a.m. ET
A magnitude 5.9 struck eastern Japan on August 22, 2026, according to reports from japantoday.com and wtop.com. The quake's depth was reported as by wtop.com and japantoday.com, while straitstimes.com reported . The magnitude was reported as , and no tsunami evaluation was flagged, with no tsunami alert issued, according to wtop.com. The 's location is reported differently by the sources: japantoday.com and straitstimes.com place it in , while wtop.com and economictimes.indiatimes.com place it in . The exact time of the quake also differs: wtop.com reports it at 18:01 UTC on August 22, while japantoday.com reports it at 02:00 UTC on August 23. The cause of the has not been determined.

Earlier reports

  1. Aug 22, 2026, 2:44 p.m. ETFirst report

    Magnitude 5.9 Earthquake Strikes Southern Ibaraki Prefecture, Japan

    A magnitude 5.9 earthquake struck southern Ibaraki prefecture in Japan on August 22, 2026, according to wtop.com. The quake occurred at a depth of 70 kilometers (42 miles), as reported by wtop.com.

    The magnitude is listed as automatic, and no tsunami evaluation was flagged, according to wtop.com. The event is still developing, and further details have not been confirmed.

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Sources

Revision history

  1. Version 824 Aug 2026, 08:15current

    Updated to reflect the published status and refined source attribution.

  2. Version 723 Aug 2026, 06:52

    Updated to reflect published status; no substantive changes from v6.

  3. Version 623 Aug 2026, 04:14

    Updated to reflect conflicting reports on depth and location, and clarified that no tsunami alert was issued.

  4. Version 523 Aug 2026, 03:14

    Updated to reflect the published status and ensure all facts are attributed correctly.

  5. Version 423 Aug 2026, 01:09

    Updated to include economictimes.indiatimes.com as a source for location and depth, and clarified the conflicting reports on time and location.

  6. Version 322 Aug 2026, 23:09

    Added straitstimes.com as a source for depth and location; clarified conflicting reports on time and location.

  7. Version 222 Aug 2026, 22:14

    Updated to reflect conflicting reports on location and time, and removed unsupported statement about cause.

  8. Version 122 Aug 2026, 18:51

    First published.

  9. Version 122 Aug 2026, 18:44current

    First published.

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