Huge Chilean earthquake, magnitude 8.8

A huge earthquake struck offshore Chile Saturday 3:34 am local time.  The magnitude of 8.8 makes it one of the 5 or 6 largest earthquakes ever, according to the list from the NEIC:

	Location	Date UTC	Magnitude	Lat.	Long.	Reference
1.	Chile	1960 05 22	9.5	-38.29	-73.05	Kanamori, 1977
2.	Prince William Sound, Alaska	1964 03 28	9.2	61.02	-147.65	Kanamori, 1977
3.	Off the West Coast of Northern Sumatra	2004 12 26	9.1	3.30	95.78	Park et al., 2005
4.	Kamchatka	1952 11 04	9.0	52.76	160.06	Kanamori, 1977
5.	Off the Coast of Ecuador	1906 01 31	8.8	1.0	-81.5	Kanamori, 1977
6.	Rat Islands, Alaska	1965 02 04	8.7	51.21	178.50	Kanamori, 1977
7.	Northern Sumatra, Indonesia	2005 03 28	8.6	2.08	97.01	PDE
8.	Assam - Tibet	1950 08 15	8.6	28.5	96.5	Kanamori, 1977
9.	Andreanof Islands, Alaska	1957 03 09	8.6	51.56	-175.39	Johnson et al., 1994
10.	Southern Sumatra, Indonesia	2007 09 12	8.5	-4.438	101.367	PDE

There is a tsunami warning issued by the NOAA Pacific Tsunami Warning Center.

Below is the seismogram from my home institution of Franklin & Marshall College:

Click on the figure for a larger image.  The waves arrive a few minutes after 6:30, coordinated universal time (time scale on the right).