EARTHQUAKE-RISK MAPPING

EARTHQUAKE RISK MAPPING IS A SYNOPTIC ANALYSIS OF THE LIKELIHOOD OF THE OCCURRENCE OF EARTHQUAKES IN DIFFERENT LOCALES. IT IS ACHIEVED BY COMBINING SPACE PHOTOGRAPHIC DATA, INFERRED STRUCTURAL LINEAMENTS, GEOLOGICAL RECORDS OF FAULT LINES, AND SEISMIC HISTORY OF THE AREA. THE TEST AREA OF THIS STUDY IS THE GREATER LOS ANGELES VICINITY OOCCUPYING 100 X 100 SQUARE MILES. A GRID WITH INNER CELL SIZE OF 10 X 10 SQUARE MILES WAS USED AS A CONTROL FOR CONSTRUCTING CHOROPLETH AND ISOPLETH MAPS OF SEISMIC RISKS. THE PATTERN REVEALED BY THE THREE RESPONSE VARIABLES DIFFERED SLIGHTLY. THE FINAL MAP INTEGRATING STATISTICALLY THE THREE VARIABLES REPRESENTS THE RISK NATURE OF THE AREA. IT INDICATES THAT A LOW-RISK ZONE IS CENTERED AT THE LOS ANGELES BASIN. THE RISK INCREASES IN THREE DIRECTIONS: (1) TO THE NORTHWEST ALONG SAN GABRIEL MOUNTAIN, (2) TO THE SOUTHEAST ALONG SANTA ANA MOUNTAIN, AND (3) TO THE NORTHEAST TOWARDS SAN BERNARDINO MOUNTAIN. THE RISK MAP SHOULD BE CONSIDERED DYNAMIC. THE CONSTANT INFLOW OF RELATED DATA SHOULD BE PROCESSED CONSTANTLY BY MEANS OF STATISTICAL METHODS AND COMPUTER GRAPHICS.

  • Authors:
    • Kedar, E Y
    • Hsu, S Y
    • Paterson, W
  • Publication Date: 1973-8

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Filing Info

  • Accession Number: 00203029
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 5 1974 12:00AM