National Tsunami Warning Center, NOAA/NWS

Indonesian Tsunami of 25 October, 2010
(Kepulauan Mentawai Region, Indonesia)

A major earthquake with a moment magnitude of 7.7 (USGS Magnitude) occurred at 14:42:22 UTC 25 October 2010 (day 298) and was located 150 miles/240 km W of Bengkulu, Sumatra, Indonesia (3.484S, 100.114E, 12.8miles/20.6km depth -- USGS Location).

This earthquake produced a tsunami that was recorded at tide gages operated by the University of Hawaii's Department of Oceanography's Global Sea Level Observing System (GLOSS) which is monitored at the Tsunami Warning Centers. Many observatories provide data to the centers; such as the NOAA National Ocean Service, the U. of Hawaii Sea Level Center, the Chilean Navy, and the National Tidal Facility in Australia among others. Click on the site name to see a graph of the tsunami, when available. Listed wave heights are maximum amplitude in cm (above sea level). Observed Arrival time is the actual tsunami arrival time in UTC on gages where it could be determined. The Estimated Arrival time 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 data samples.

For additional information about this tsunami event see the Pacific Tsunami Warning Center's homepage.

 

travel time map

maximum amplitude graph

Travel Time Map
(click to enlarge)

Maximum Amplitude Graph
(click to enlarge)

 

Tide gage/
Measurement Location

Peak amplitude (above sea level in cm)

Observed Initial Arrival time
[UTC (J.Day)]

Estimated Arrival time (UTC)

Initial motion

Sample Interval (min)

Data File (Julian Day Starts at  0000 UTC)

Rodrigues, Mauritius *

26

2029 (298)

2036

rise

1

 

Port Luis, Mauritius

29

2158 (298)

2129

rise

1

298, 299

Cocos Islands, Australia

20

1557 (298)

1602

rise

1

298, 299

Hillary's Bay, Australia

11

2002

rise

1

298, 299

Enggano, Indonesia*

22

1519 (298)

?

1

 

Padang, Indonesia

35

1540 (298)

1534

fall

1

298, 299

Tanahbalah, Indonesia *

25

1539 (298)

?

1

 

Telukdalam, Indonesia

16

1535 (298)

rise

1

298, 299

Diego Garcia, UK

4

1841 (298)

rise

1

298, 299

Gan, Maldives

5

1837 (298)

1847

rise

1

298, 299

Pointe La Rue, Seychelles

13

2230 (298)

2223

?

1

298, 299

Male, Maldives *

8

1854 (298)

?

1

 

Hanimaadhoo, Maldives

10

1912 (298)

1920

rise

1

298, 299

Colombo, Sri Lanka

6

1829 (298)

rise

1

298, 299

Trinconmalee, Sri Lanka

7

1822 (298)

rise

1

298, 299

Chabahar, Iran

4

0038 (299)

 

rise

1

298, 299

Karachi, Pakistan

6

0028 (299)

2353 (298)

rise

1

298, 299

Marion Island, S. Africa

44

0310 (299)

 

?

1

298, 299

Port Elizabeth, S. Africa

23

0407 (299)

 

?

1

298, 299

Masirah, Oman

4

2310 (298)

2307 (298)

?

1

298, 299

* Information From PTWC

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