Electronic Supplement to
Intensity, Magnitude, Location and Attenuation in India for Felt Earthquakes since 1762

by Walter Szeliga, Susan Hough, Stacey Martin, and Roger Bilham

Table and Figures Depicting Hypocenter Locations with Supporting Parameters and Uncertainty

This electronic supplement contains one table with accompanying figures. Table S1 provides a summary of earthquake epicenters for each event in the catalog for which we were able to calculate an epicenter using the methods outlined in the paper. For each earthquake, the following information is listed: column Date refers to the date of an earthquake in the local time. A location and magnitude derived using both the minimum deviation and minimum magnitude epicentral location methodologies described in the paper are also listed. Column Earthquake Name provides a geographic region descriptor that links each earthquake to the tables in the electronic supplement of Martin and Szeliga (2010)Martin, S. and Szeliga, W. (2010). A Catalog of Felt Intensity Data for 570 Earthquakes in India from 1636 to 2009. Bull. Seismol. Soc. Am., 100(2), 562..

For each calculated epicenter, we show a 5o × 5o region surrounding the epicenter. All intensity data located within the 5o × 5o region are also listed using Arabic numerals. On each figure, the red contours indicate the 95%, 80% and 50% confidence intervals using the values published in Bakun and Wentworth (1999)Bakun, W. H. and Wentworth, C. M. (1999). Erratum: Estimating Earthquake Location and Magnitude from Seismic Intensity Data. Bull. Seismol. Soc. Am., 89(2), 557.. The blue contours indicate the mean magnitude inferred at each location from the data and attenuation relationship developed in the paper. The red star indicates the minimum deviation location while for instrumentally located earthquakes, the red circle indicates the instrumentally determined epicenter. Both the input and output parameters used in the epicentral estimation algorithm are listed in the upper right corner of each figure. Input parameters include the number of observations used, denoted Observations, the starting latitude, longitude and depth and whether these were chosen by the authors (User Input), automatically calculated (Intensity Centroid) or instrumentally constrained (Input File). For events with an instrumentally determined magnitude, this information is listed. If no magnitude is available, this is denoted as “NA”. The epicenter estimated from the catalog is listed after “Estimated Epicenter” along with the distance from the starting location of the algorithm. The estimated magnitude for the event is listed following Mw and, if available, the difference between the estimated magnitude and actual magnitude is shown in parenthesis following the estimated magnitude.


Table (with Links to Figures)

Table S1.


References

Bakun, W. H. and Wentworth, C. M. (1999). Erratum: Estimating Earthquake Location and Magnitude from Seismic Intensity Data. Bull. Seismol. Soc. Am., 89(2), 557.

Martin, S. and Szeliga, W. (2010). A Catalog of Felt Intensity Data for 570 Earthquakes in India from 1636 to 2009. Bull. Seismol. Soc. Am., 100(2), 562.



[ Back ]