PAGER - M 4.8 - SOUTHERN TEXAS

Alert level does not include impacts from earthquake-related hazards such as tsunamis, landslides, fires or liquefaction.

Earthquake Shaking Alert Level: GREEN

Download Alert PDF What's this?Thursday, October 20th, 2011 at 12:24:40 UTC (07:24:40 local)Location: 28.8° N, 98.1° WDepth: 3kmEvent Id: USB0006ALUAlert Version: 2Created: 2 hours, 16 minutes after earthquake.

Alert Information

Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.

Estimated Fatalities

ESTIMATED FATALITY ALERT: GREEN
ESTIMATED FATALITIES (LEVEL)	Probability (%)
0 (GREEN)	99
1 to 9 (YELLOW)	1
10 to 99 (YELLOW)	0
100 to 999 (ORANGE)	0
1 to 10 thousand (RED)	0
10 to 100 thousand (RED)	0
100 thousand + (RED)	0

Estimated Economic Losses

ESTIMATED ECONOMIC ALERT: GREEN
ESTIMATED VALUE IN USD (LEVEL)	Probability (%)
0 to 1 million (GREEN)	99
1 to 10 million (YELLOW)	1
10 to 100 million (YELLOW)	0
100 million to 1 billion (ORANGE)	0
1 to 10 billion (RED)	0
10 to 100 billion (RED)	0
100 billion + (RED)	0

Detailed Information

Estimated Population Exposed to Earthquake Shaking
Estimated Modified Mercalli Intensity		I	II-III	IV	V	VI	VII	VIII	IX	X
Est. Population Exposure		---*	2,490k*	639k	3k	166	77	0	0	0
Perceived Shaking		Not Felt	Weak	Light	Moderate	Strong	Very Strong	Severe	Violent	Extreme
Potential Structure Damage	Resistant	none	none	none	V. Light	Light	Moderate	Moderate/Heavy	Heavy	V. Heavy
Potential Structure Damage	Vulnerable	none	none	none	Light	Moderate	Moderate/Heavy	Heavy	V. Heavy	V. Heavy

*Estimated exposure only includes population within calculated shake map area

Population Exposure
Population per ~1 sq. km. from LandScan

Structure Information Summary

Overall, the population in this region resides in structures that are resistant to earthquake shaking, though some vulnerable structures exist.

Historical Earthquakes (with MMI)

Selected Cities Exposedfrom GeoNames Database of Cities with 1,000 or more residents.

MMI	City	Population
IV	Karnes City	3k
IV	Poth	2k
IV	Kenedy	3k
IV	Floresville	7k
IV	Pleasanton	10k
IV	Three Rivers	2k
III	Corpus Christi	277k
III	San Antonio	1,257k
III	New Braunfels	46k
III	Victoria	62k
III	San Marcos	47k

(k = x1,000)

Nearby Events in the EXPO-CAT Earthquake Catalog
#	Date/Time	Mag	Lat, Lon, Depth	Country	Max MMI (Exposed)	Deaths		Secondary Effects
#	Date/Time	Mag	Lat, Lon, Depth	Country	Max MMI (Exposed)	Shaking	Total	Secondary Effects
No historic events found within search parameters

MMI	City	Population
IV	Karnes City	3k
IV	Poth	2k
IV	Kenedy	3k
IV	Floresville	7k
IV	Pleasanton	10k
IV	Three Rivers	2k
IV	Jourdanton	4k
IV	Poteet	4k
IV	Schertz	28k
IV	Universal City	16k
IV	Runge	1k
IV	Stockdale	2k
IV	Leon Valley	9k
IV	Somerset	2k
III	Corpus Christi	277k
III	Hill Country Village	1k
III	Hollywood Park	3k
III	Alamo Heights	7k
III	Olmos Park	2k
III	Balcones Heights	3k
III	China Grove	1k
III	Kirby	9k
III	Castle Hills	4k
III	San Antonio	1,257k
III	Live Oak	10k
III	Selma	3k
III	Windcrest	5k
III	La Vernia	1k
III	Saint Hedwig	2k
III	George West	2k
III	Shavano Park	2k
III	Terrell Hills	5k
III	Converse	12k
III	Beeville	13k
III	Cibolo	6k
III	Nixon	2k
III	New Braunfels	46k
III	Blue Berry Hill	1k
III	Charlotte	2k
III	Garden Ridge	2k
III	Yorktown	2k
III	Helotes	6k
III	Marion	1k
III	Northcliff	2k
III	McQueeney	3k
III	Timberwood Park	8k
III	Hondo	8k
III	Dilley	4k
III	Castroville	3k
III	Skidmore	1k
III	Goliad	2k
III	Bulverde	4k
III	Cuero	7k
III	La Coste	1k
III	Mathis	5k
III	Pearsall	7k
III	Port Aransas	4k
III	Orange Grove	1k
III	Seguin	24k
III	Gonzales	7k
III	Refugio	3k
III	Sinton	5k
III	Woodsboro	2k
III	Freer	3k
III	Gardendale	1k
III	Odem	2k
III	Victoria	62k
III	Yoakum	6k
III	Alice	20k
III	Cotulla	4k
III	Lakehills	6k
III	Martindale	1k
III	Rancho Alegre	2k
III	Redwood	4k
III	Robstown	13k
III	San Diego	5k
III	Shiner	2k
III	Taft	3k
III	Taft Southwest	2k
III	Devine	4k
III	Bloomington	3k
III	Cross Mountain	2k
III	Gregory	2k
III	Inez	2k
III	Portland	16k
III	Aransas Pass	9k
III	Benavides	2k
III	Bishop	3k
III	Fulton	2k
III	Ingleside	10k
III	Rockport	9k
III	Natalia	2k
III	Buda	5k
III	Sabinal	2k
III	Lytle	2k
III	Blanco	2k
III	Canyon Lake	22k
III	Seadrift	1k
III	Comfort	3k
III	Scenic Oaks	4k
III	Fair Oaks Ranch	6k
III	Luling	5k
III	San Marcos	47k
III	Boerne	7k
III	Lockhart	14k
III	Kyle	18k
III	Medina	3k
III	Wimberley	3k
III	Woodcreek	2k
III	Bandera	1k
III	Hallettsville	2k
III	Flatonia	1k
III	Cactus	3k
III	Smithville	4k
III	Weimar	2k
II	Schulenburg	3k
II	Bastrop	8k
II	Kerrville	22k
II	La Grange	5k
II	Ingram	2k

(k = x1,000)

PAGER content is automatically generated, and only considers losses due to structural damage. Limitations of input data, shaking estimates, and loss models may add uncertainty. PAGER results are generally available within 30 minutes of the earthquake’s occurrence. However, information on the extent of shaking will be uncertain in the minutes and hours following an earthquake and typically improves as additional sensor data and reported intensities are acquired and incorporated into models of the earthquake's source. Users of PAGER estimates should account for uncertainty and always seek the most current PAGER release for any earthquake.