31 August 1998 (revised 10 August 2001)
Table of Contents |
|
Chapter 12 of, State of Texas
Hazards Analysis, by the Governor's Division of Emergency Management,
Department of Public Safety, Austin, Texas, 1998. |
| Introduction: Earthquakes in Texas |
Figure 12A: Locations of earthquakes and earthquake sequences that have occurred in Texas, or that were felt by residents. |
Figure 12B:
Map indicating probable causes of earthquakes occurring in Texas. |
| Earthquake Magnitude, Intensity, and Damage |
Figure 12C:
Earthquake hazard map for the continental United States
as prepared by the U. S. Geological Survey. |
| Earthquake felt intensity - the Modified Mercalli Intensity Scale |
Figure 12D:
Felt area and Modified Mercalli Intensities experienced by Texans from the
magnitude 6.0 Valentine, Texas, earthquake of 16 August, 1931. |
Figure 12E: Felt area and Modified Mercallli Intensities experienced by Texans from the magnitude 4.3
Fashing, Texas, earthquake of 9 April 1993. |
Figure 12F:
Relationship
Between Earthquake Magnitude and Maximum Observed Modified Mercalli
Intensity (MMI).
Approximate Relationship Between Earthquake's Magnitude and the Diameter of and
Slip Along the Fault that Produces It. |
| The Cause of Earthquakes |
Figure 12G:
Estimated felt area and Modified Mercalli Intensities for the magnitude 8 Missouri-Tennessee earthquakes of 1811-1812. |
Figure 12H:
Tectonic map of Texas |
| Assessing Earthquake Hazards |
| Where is the Hazard Greatest? |
| Monitoring Earthquakes as a Mitigation Strategy |
Figure 12I |
Regional Hazard Assessments
- West Texas
Significant Historic Earthquakes Affecting West Texas<
Figure 12W-A:
Areas
in West Texas which experienced Modified Mercalli Intensities of IV
or V and VI during the earthquakes of 16 June 1978 (near Snyder in
Scurry County), 2 January 1992 (near Andrews County - New Mexico
border) or 14 April 1995 (near Alpine in Brewster County). Almost the entire area shown experienced intensities of VI during
the earthquake of 16 August 1931.
Mitigation Strategy
Table of West Texas Earthquakes
- Texas Panhandle
Significant Historic Earthquakes Affecting the Panhandle.
Figure
12P-A:
Areas in the Panhandle which experienced Modified Mercalli Intensities of V
and VI during the earthquakes of 1925 and 1936 (near Borger, in Hutchison County), 1948 (near Dalhart, in Dallam County), 1952 (in Oklahoma),
or 1974 (near Perryton, in Ochiltree County).
Mitigation Strategy
Table of Texas Panhandle Earthquakes
- Northeast Texas
Significant Historic Earthquakes Affecting Northeast Texas
Figure 12N-A:
Felt areas of representative historical earthquakes in northeastern Texas.
Indicates areas of intensity V and above for earthquakes of 1932 (Limestone County), 1934 (northern Lamar County), 1957 (Gregg County),
and 1964 (Sabine County). Estimated boundaries of Modified Mercalli Intensities for the 1811-1812 Missouri-Tennessee earthquakes.
Mitigation Strategy
Table of Northeast Texas Earthquakes
- South-Central Texas
Significant Historic Earthquakes Affecting South-Central Texas
Figure
12S-A: Felt areas of representative historical earthquakes in South-Central Texas.
Areas of intensity IV and above for earthquakes of 1887 (Bastrop County), 1902 (Travis County), 1910 (Waller County), 1993 (Atascosa County), and 1997 (Jim Wells
County).
Mitigation Strategy
Table of South-Central Texas Earthquakes
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