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Magnitude 6.4 - Costa Rica, November 20, 2004
Published: November 21, 2004 8:30 am

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Eight people killed and several injured; 526 buildings damaged or destroyed; many roads and bridges damaged; some landslides occurred in the San Jose area. Water lines broke at Parrita and power outages occurred at Quepos. Felt in much of Costa Rica. Felt (VII) at Parrita and Quepos; (VI) at Damas, Failes and Jaco; (V) at Alajuela, Monterrey, Naranjo, Puntarenas, San Isidro, Turrialba and Zapote; (IV) at Batan, Bribri, Limon, Los Chiles, Nicoya, Palmar Sur and Upala.

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver

A strong earthquake occurred at 08:07:21 (UTC) on Saturday, November 20, 2004. The magnitude 6.4 event has been located in COSTA RICA. (This event has been reviewed by a seismologist.)
Small Globe

Small map showing earthquake

Magnitude 6.4
Date-Time Saturday, November 20, 2004 at 08:07:21 (UTC)
= Coordinated Universal Time
Saturday, November 20, 2004 at 2:07:21 AM
= local time at epicenter

Time of Earthquake in other Time Zones
Location 9.581°N, 84.228°W
Depth 16 km (9.9 miles) set by location program
Region COSTA RICA
Distances
40 km (25 miles) SSW of SAN JOSE, Costa Rica
80 km (50 miles) ESE of Puntarenas, Costa Rica
140 km (85 miles) WSW of Limon, Costa Rica
155 km (95 miles) NW of Golfito, Costa Rica
Location Uncertainty horizontal +/- 4 km (2.5 miles); depth fixed by location program
Parameters Nst=245, Nph=245, Dmin=111.2 km, Rmss=0.92 sec, Gp= 40°,
M-type=teleseismic moment magnitude (Mw), Version=R
Source USGS NEIC (WDCS-D)
Event ID usrban




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