Magnitude 5.9 Earthquake Occurred near the East coast of Honshu, Japan

- Time: 2024-04-01 at 19:24:36 UTC
             2024-04-02 at 04:24:36 Tokyo
- Location: 40.14° LAT, 141.71° LON
- Magnitude: Mww5.9
- Depth: 72 km
- Focal mechanism: Other
- Provider: USGS, USGS_Quakes, GlobalCMT


Picture 1: Location of the magnitude 5.9 earthquake near the East coast of Honshu, Japan.

The earthquake occurred in an area where we highlighted that the rotational singularity will contribute to the INCREASED seismic hazard exposure, as shown here and in the picture below.

Rotational singularity can occur when the fault planes are "infinitely" close to each other or the theoretically infinite shear- and normal tractions are associated with finite (micro)rotations within infinitely small regions (volumes of rocks). In practice, this happens when tectonic waves with low Cosserat lengths (generally) interact with each other within a region. Its shape can be elongated (like e.g. before the Great Noto Earthquake in Japan) or circular.


Picture 2: Post about rotational singularity influencing earthquake-triggering in Japan region.

The earthquake occurred in an area where we announced INCREASED seismic hazard exposure (yellow alert) in our latest weekly earthquake forecast for the Japan region, on April 2, 2024, available here.


Picture 3: The latest earthquake forecast for the Japan region, posted on April 2, 2024.

Quantectum's Macroseismic Intensity map suggests "VI" as a maximum intensity, which corresponds to VERY STRONG shaking and potential SLIGHT damage around the epicenter. Potentially exposed cities were Kuji (pop. 34,000), Noda (pop. 4,000), Ichinohe (pop. 12,000), Hachinohe (pop. 239,000), Marioka (pop. 291,000), Hanamaki (pop. 95,000), Aomori (pop. 298,000), Hirosaki (pop. 169,000), Akita (pop. 306,000), Ichinoseki (pop. 114,000), Osaki (pop. 129,000), Hakodate (pop. 276,000), Sakata (pop. 99,000), Tsuruoka (pop. 125,000).


Picture 3: Macroseismic Intensity map for the magnitude 5.9 earthquake near the Eastern coast of Honshu, Japan.

There have been no reports of damage, injuries, or casualties as a result of the earthquake so far.

 

* The exact information about the magnitude, epicenter, and depth of the earthquake might be revised within the next few hours as seismologists review data and refine their calculations, or as other data providers issue their reports.

** The information provided is a product of Quantectum's own system, please tag Quantectum when sharing it. For more detailed information, contact us by email.

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