Magnitude	4.4
	Date-Time	Monday, October 04, 2004 at 21:21:34 (UTC) - Coordinated Universal Time Tuesday, October 05, 2004 at 07:21:34 AM local time at epicenter Time of Earthquake in other Time Zones
	Location	14.50N 147.21E
	Depth	35 kilometers
	Region	MARIANA ISLANDS REGION
	Reference	180 km (110 miles) ESE of SAIPAN, Northern Mariana Islands 220 km (135 miles) E of Rota, Northern Mariana Islands 265 km (165 miles) SE of Anatahan, Northern Mariana Islands 290 km (180 miles) ENE of HAGATNA, Guam
	Location Quality	Error estimate: horizontal +/- 21.1 km; depth +/- 0.0 km
	Location Quality Parameters	Nst=12, Nph=12, Dmin=272.2 km, Rmss=0.78 sec, Erho=21.1 km, Erzz=0.0 km, Gp=216.6 degrees
	Source	USGS NEIC (WDCS-D)

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NB: The official magnitude for this earthquake is indicated at the top of this page. This was the best available estimate of the earthquake's size, at the time that this page was created. Other magnitudes associated with web pages linked from here are those determined at various times following the earthquake with different types of seismic data. Although, given the data used, they are legitimate estimates of magnitude they are not considered the official magnitude.

The region name is an automatically generated name from the Flinn-Engdahl (F-E) seismic and geographical regionalization scheme. The boundaries of these regions are defined at one-degree intervals and therefore differ from irregular political boundaries. More->