January 1, 2024 Tsunami: W Coast, Honshu, Japan

Ref #13687:

Houses damaged/destroyed: 6 inundated above floor level, 19 inundated below floor level.

Ref #13706 reports many buildings and homes destroyed and other damages in Ishikawa prefecture by the tsunami

Ref #13693: Noto [tide] station seems destroyed

Ref #13746: The [Ishikawa Prefecture] government said two people were confirmed killed by the waves as of Feb. 8. The low death toll has been attributed partly to community preparations honed in disaster drills.

Ref #13860, #14324: 2 deaths by tsunami

Ref #13861 indicates possible 26 tsunami deaths

Ref #13789:

Although a tsunami travel time of approximately 0.5 h–2.5 h is evident in various tide gauge records, it is important to note that tsunami arrived at Toyama station almost immediately with a leading depression wave (Fig. 3b) despite a distance of ~70 km from this station to the epicentral area. This immediate arrival time and the leading depression wave is a sign that the wave was most likely generated by a submarine landslide located close to this tide gauge station triggered by the earthquake (e.g., Heidarzadeh et al. 2023).

The maximum runup value of 6.2 m was recorded in Joetsu which was the farthest location to the epicenter. This remarkable observation is attributed to the directivity of tsunami waves, suggesting that the most significant waves propagate perpendicular to the tsunamigenic fault’s strike.

Ref #13791:

The tsunamis observed in Iida Bay were remarkably higher than those at other coasts, and it can be inferred that some mechanisms may have amplified the tsunami.

The area surrounding Ukai Fishing Port in Iida Bay was the most widely inundated by the tsunami, and an aerial photo image and field surveys revealed that the area was inundated up to approximately 500 m inland from the coast.

[…] tree branches and trash were deposited extensively in front of the coastal dike in Namerikawa, Toyama Prefecture; however, definitively attributing these deposits to the tsunami is challenging. On January 1, when the earthquake occurred, Toyama Bay experienced stormy weather.

A topographic survey by the Japan Coast Guard immediately after the earthquake revealed a submarine landslide of approximately 500 m long and 80 m wide in Toyama Bay, with depths of up to 40 m. A seafloor slope 30 km offshore of the Noto Peninsula collapsed over a length of 1.6 km. Submarine landslides are speculated to have caused an early tsunami before the arrival of the main seismic tsunami.

Ref #13809:

maximum runup reported as 7.23 m (relative to mean sea level) in Joetsu City

Ref #14076:

Along the west coast of the Noto Peninsula, the tsunami heights revealed by field surveys ranged from 2 to 11 m in elevation, with a maximum height at Kuroshima

Ref #13859:

submarine landslides occurred approximately 50 s after the earthquake, coinciding with the peak ground shaking in Toyama Bay. Compared to the seismic tsunami originating solely from the Noto Peninsula offshore fault rupture, the subsequent tsunami triggered by submarine landslides amplified the tsunami height by approximately 30% along Toyama Bay.

Ref #13968:

Submarine landslides in Toyama Bay could explain the tsunami arrival time at the Toyama station, A similar submarine landslide and subsequent tsunami were reported in Toyama Bay during the 2007 Noto earthquake (Abe et al. 2008) […] While dozens of submarine landslides have been documented in Toyama Bay, there have been no prior reports of landslides occurring directly in front of the Toyama tide station (Abe et al. 2008; Moriki et al. 2017). Therefore, a sufficient amount of sediment, ready to slide, may have accumulated at these locations