U.S. Geological Survey       National Strong-Motion Program

Event Name: Denali Fault, Alaska Earthquake
Event Date: 11/03/2002, 22:12 UTC (11/03/2002, 01:12 PM AKST)
Event Identification: 20021103_2212
Recorder Type: Kinemetrics: Etna, K2, SMA1; Guralp: CMG5TD; custom

Data Organization and Format ||  Download (updated 02/13/2003),  TAPS  (updated 05/02/2006) ||  Tables  (updated 12/31/2002) ||  Links

Data Organization and Format

The November 03, 2002 22:12 UTC Mw 7.9 Denali Fault, Alaska Earthquake data recorded by the USGS National Strong-Motion Network (NSMN) and the University of Alaska Geophysical Institute Anchorage Region Strong-Motion Network (University of Alaska contact: Niren Biswas niren@giseis.alaska.edu) are available via the NSMP ftp server in the folder (directory) "20021103_2212" (ftp://smftp.wr.usgs.gov/20021103_2212).    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 data have the following form:

uncorrected acceleration: RRRRc_u.smc
corrected acceleration: RRRRc_a.smc
corrected velocity: RRRRc_v.smc
corrected displacement RRRRc_d.smc
response spectra: RRRRc_r.rs2
Fourier amplitude spectra (f): RRRRc_f.fs1

where 'RRRR' is the four-digit recorder serial number (including leading 0's) for the USGS data, '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.  Important note: 'RRRR' is the four-digit station code (k201 to k222) for the University of Alaska's Advanced National Seismic System (ANSS) data.

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.

Data recorded by the Alyeska Pipeline Service Company (APSC) are provided on a cooperative basis to the USGS and can be accessed at:


TAPS (Trans-Alaska Pipeline Service)
Data recorded by the Alyeska Pipeline Service Company (APSC) are provided on a cooperative basis by APSC to the USGS and can be accessed at:

To facilitate downloading the data, the data have been compressed into PC compatible ".zip" format.  The same zip file is located in the "zips" folder in "20021103_2212/" on the NSMP ftp server, "ftp://smftp.wr.usgs.gov/20021103_2212"

20021103 22:12 UTC Denali Fault, Alaska Earthquake Downloads in ".zip" format

20021103_2212_uncorr.zip     uncorrected  (8.0 MB; uncompresses to 26.2 MB; updated 12/05/2002)
20021103_2212_corr.zip     corrected (35.1 MB; uncompresses to 106 MB; updated 12/05/2002)
http://nsmp.wr.usgs.gov/data_sets/20021103_2212_taps.html (posted 12/31/2002; updated 05/02/2006)


List of corrected peak ground accelerations and velocities for available time-series data, updated 12/31/2002 (to obtain list as Excel spreadsheet click here ; click cancel button if get pop-up window requesting user name and password)

UA Anchorage Strong-Motion Network Site Characteristics (posted 10/31/2002) 

Web Links to Denali Fault Earthquake of 2002

USGS National Earthquake Information Center (NEIC) Earthquake Bulletin

Alaska Earthquake Information Center

Rupture in South-Central Alaska—The Denali Fault Earthquake of 2002  USGS Fact Sheet 014-03

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This page was posted on November 04, 2002; updated 05/02/2006.