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South Central Texas Earthquakes of Magnitude 3 or Greater

EARTHQUAKE SEISMOLOGY

COMPENDIUM OF EARTHQUAKES IN TEXAS

South Central Texas Earthquakes
of Magnitude 3 or Greater.

*Imax = Maximum Modified Mercalli intensity reported.
**Cause:  T=probably tectonic in origin.  M=probably man-made (induced).  ?=poorly constrained event, insufficient or conflicting evidence.

Date Origin time
 (UTC)
Lat.°N Long. °W Magnitude Imax* Felt area
(km2)
Cause** Location County

14 Feb. 1847 02 29.6 98. 3.6 V ? 1200 Sequin Guadalupe
Comments: Newspaper reports cracked timber in houses at Seguin and New Braunfels.
01 May 1873

04:30

30.25

97.6

3.1

III-IV

T

Manor

Travis

05 Jan. 1887

17:57

30.15

97.06

4.1

V-VI

4,600

T

Paige

Bastrop

31 Jan. 1887

22:14

30.53

96.3

3.3

IV

T

Wellborn

Brazos

09 Oct. 1902 19 30.10 97.6 3.9 IV-V 5,600 T Creedmoore Travis
08 May 1910 17.30 30.1 96.0 3.8 IV 2,900 T Hempsted Waller
30 Dec. 1914 01 30.5 95.9 3.3 IV T Anderson Grimes
25 Dec. 1973 02:46:10 28.82 98.20 3.2 IV M Fashing Atascosa
20 Apr. 1974 23:46:10 29 98 3.0 M South Texas Atascosa
24 June 1974 18:03:10 29 98 3.4 M South Texas Atascosa
01 Aug. 1974 13:33:10 29 98 3.0 M South Texas Atascosa
28 Mar. 1982 23:24:33 29 98 3.0 M South Texas Atascosa
23 July 1983 15:24:39 28.82 98.18 3.4 V 200 M Fashing Atascosa
Comments: A boiler at a gasoline plant was automatically shut down by the shaking.
03 Mar. 1984 01:03:26 28.87 98.50 3.9 V 1,300 M Pleasanton Atascosa
Comments: A few possible reports of plaster cracking and cracks in concrete being widened by the shock.
03 Mar. 1984 01:58:25 28.87 98.50 3.2 IV 100 M Pleasanton Atascosa
08 Aug. 1984 01:31:27 29.87 98.50 3.1 IV M Pleasanton Atascosa
20 July 1991 23:38:17 29.0 98.0 3.6 IV 110 M Falls City Karnes
09 Apr. 1993 12:29:19 28.87 98.50 4.3 VI 5,000 M Fashing Atascosa
Comments: Ground motion triggered a shutdown of a gas plant.
Damage at the plant included broken concrete blocks and stretched or broken bolts.
Other minor damage reported in neighboring communities.
16 May 1993 15:30:19 28.9 98.5 3.0 IV 300 M Jourdanton Atascosa
Comments: A few possible reports of plaster cracking and cracks in concrete being widened by the shock.
24 Mar. 1997 22:31:34 27.72 98.05 3.8 V-VI 950 M Alice Jim Wells
Comments: Very slight damage reported, including broken Easter eggs.

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