National Tsunami Warning Center, NOAA/NWS

Tsunami of 25 March, 2007

A major earthquake with an initial magnitude of 7.1 ocurred at 0042 UTC 25 March 2007, off the west coast of Honshu, Japan (37.281°N, 136.602°E, 50Km depth - USGS location).

The earthquake produced a small tsunami that was recorded at several tide gages operated by the Japanese Meteorological Agency. The magnitude of the earthquake was subsequently resized to M 6.7. Wave heights are maximum peak-to-trough height in cm. Arrival time is the actual tsunami arrival time in UTC on gages where it could be determined. The ETA is the estimated time of arrival computed at the National Tsunami Warning Center (NTWC) based on the origin time and location. The Sample Interval column shows the time between samples.

Tide gage site Wave height (cm p-t) Arrival time (UTC) ETA (UTC) Initial motion Sample Interval (min) Data File
Noto, Japan 30 Est. 1018*** *** Unk. 2 Data unavailable for this event
Toyama, Japan 20 Est. 0950*** *** Unk. 2 Data unavailable for this event
Maizuru, Japan 20 Est. 1230*** *** Unk. 2 Data unavailable for this event

*** NTWC does not have a data feed for these Japanese tide gauges and therefore, is not able to provide the data, or actual/computed ETAs for these sites.