Servicio Nacional de Estudios Territoriales (SNET)

Event Name: El Salvador Earthquake
Event Date: 01/13/2001 17:33 UTC (11:33 am Local Time)
Event Identification: 20010113_1
Recorder Type: SMA-1

Data Organization and Format ||  Downloads (updated 09/27/2002) || Tables (updated 09/27/2002) || Maps || Links || Acknowledgements

Data Organization and Format

The January 13, 2001, 17:33 UTC Mw 7.6 El Salvador Earthquake data recorded by the Servicio Nacional de Estudios Territoriales (formally the Centro De Investigaciones Geotécnicas) and processed by the USGS National Strong-Motion Program Data Center are available via the NSMP ftp server in the folder (directory) "20010113_1" (https://ca.water.usgs.gov/nsmp/20010113_1).  Data from a variety of  recorders can be downloaded.  The time series provided are available in uncorrected acceleration, corrected acceleration, corrected velocity, corrected displacement, response spectra (relative displacement, relative velocity, pseudo-velocity, and absolute acceleration), and Fourier amplitude spectra of corrected acceleration.  All of the data are in SMC format.

In a departure from previous file-naming conventions (where for a particular channel the different the time series data all had the same filename, and thus required separate directories for each data type), the file names for the El Salvador data have the following form:

where 'RRRR' is the four-digit recorder serial number (including leading 0's), 'c' is the channel number of the recorder ('a' corresponds to channel 1, 'b' to channel 2 , etc), the '_x' is used to identify the data type, and the suffix refers to the data format (rs2 and fs1 are valid SMC format types recognized by the BAP processing program.

The data are stored in two directories: uncorrected (only uncorrected acceleration) and corrected (all of the corrected and processed data, including acceleration, velocity, displacement, response spectra and Fourier amplitude spectra. This convention for organizing the data was implemented to avoid confusion between the directory names (Vol1, Vol2, … Vol6) previously used for some earlier events and the standard conventions for Volume1, Volume2 and Volume 3 processing.

Information on how the data are processed can be found in the section on DATA PROCESSING.

Downloads

Time series files for station VS (Viveros De Dua, S/N 7145) are 3rd of four disjoint segments digitized to about 28 sec.  Total record duration is about 40 sec, but is dis-continuous due to stalls or re-starts of the recorder.   Peak acceleration and velocity occur within the 3rd digitized segment (between about 15.5 and 21.9 sec after the start of the record.  Image of first 28 sec.  Only acceleration and velocity data are provided for this station due to the recording malfunctions.

Tables

List of corrected peak accelerations and velocities for time-series data (updated 09/27/2002) (click here to obtain list as Excel spreadsheet)

Maps

Station Map

Links

"El Salvador Earthquakes of January 13 and February 13, 2001"  - Earthquake Engineering Research Institute (EERI) Special Earthquake Report - 2001

Acknowledgements

The Servicio Nacional de Estudios Territoriales (formally the Centro De Investigaciones Geotécnicas) from El Salvador would like to thank everyone at the USGS and especially the staff at the National Strong-Motion Program for their support.  A very special thanks to Christopher Stephens, Roy Tam, Kent Fogleman, Randall White, John Ewert, Andrew Lockhart, Carol Bryan, Edwing Harp, and Dan Miller.

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This page was posted on July 20, 2001 (updated 10/03/2002).