Samoa Island Region, 29 September 2009

At 10:48 AM Pacific Daylight Time on September 29, an earthquake with preliminary magnitude 8.0 occurred in the Samoa Islands region.

Tsunami propagation map.
Please click on image to enlarge.

Please click on the following to view the mariagram

Tide Station Observed Amplitude
Pago Pago178.8cm/5.9Ft
Nawiliwili, HI21.7cm/0.71Ft
Honolulu, HI16.3cm/0.54Ft
Kawaihae, HI24.3cm/0.79Ft
Kahului, HI36.5cm/1.19Ft
Hilo, HI16.2cm/0.53Ft
Arena Cove, CA42cm/1.38Ft
Cresent City, CA23.3cm/0.76Ft
San Francisco, CA9.3cm/0.31Ft
Monterey, CA15.8cm/0.52Ft
Port San Luis, CA29.8cm/0.98Ft
Point Reyes, CA20.5cm/0.67Ft
Charleston, OR33.6cm/0.45Ft
Easter Island29.2cm/0.96Ft
Port Vila18.2cm/0.60Ft
Shemya, AK10.2cm/0.34Ft
La push, WA14.0cm/0.46Ft
Port Orford, OR17.0cm/0.56Ft
South Beach, OR8.8cm/0.29Ft

Location Expected Amplitude
Above Sea Level
Local Time
Initial Arrival
Universal Coordinated Time (UTC)
Kahului, HI1m/3.3Ft--:----:--
Kawaihae, HI0.4m/0.13Ft--:----:--
Haleiwa, HI0.47m/1.54Ft--:----:--
Nawiliwili, HI0.15m/0.49Ft--:----:--
San Diego, CA15cm21:20 PDT04:20 UTC
San Pedro, CA30cm21:15 PDT04:15 UTC
Port San Luis, CA60cm21:07 PDT04:07 UTC
San Francisco, CA20cm21:31 PDT04:31 UTC
Cresent City, CA65cm21:20 PDT04:20 UTC
Newport, OR15cm21:52 PDT04:52 UTC
Seaside, OR25cm22:05 PDT05:05 UTC
Toke Pt, WA6cm--:----:--
Neah Bay, WA6cm22:13 PDT05:13 UTC
Sitka, AK16cm21:15 ADT05:15 UTC
Yakutat, AK6cm21:39 ADT05:39 UTC

NOAA model forecast results and preliminary analysis for the September 29, 2009 Samoa tsunami are summarized at
USGS Samoa event page is at