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WWSSN Film Chip Scanning Project


Notice to all potential users of WWSSN historical data (July 3, 2003)


NewSome High Resolution Tiff Examples (15 Oct 2002)

The jpeg images in other places on this web site were made from the orginal high resolution tiff image scans by using Adobe Photoshop to translate to the lower resolution, smaller file sizes made possible through the use of jpeg. Any non-zoomed jpeg images will appear to be much lower resolution than the original film scan. The following three tiff images of three full-sized seismograms are at the original full resolution of the scans done by Ronsin Imaging, but are larger files.

ALQ_LPZ_1964_Apr_01_1545 (477 KB)
ALQ_SPZ_1964_Mar_27_1531 (976 KB)
ALQ_SPZ_1971_Feb_24_1457 (435 KB)


NewLatest Film Scans (7 Oct 2002) Details

ALQ_SPZ_27_Mar_1964 Zoom view of a small event from the first half of the Vertical Short Period ALQ seismogram recorded on the date of the Great Alaskan EQ of March 1964. This image was scanned from the film chip of this seismogram. A few scratch marks are evident on the film chip.

ALQ_SPZ_27_Mar_1964_orig The same zoom view as ALQ_SPZ_27_Mar_1964, but scanned instead at 300 dpi from the original seismogram, for comparison.

ALQ_SPZ_28_Mar_1964 Zoom view of a small event from the last half of the Vertical Short Period ALQ seismogram recorded on the date of the Great Alaskan EQ of March 1964. This image was scanned from the film chip of this seismogram. The image on this area of the film chip was in better condition than the top half (not as many scratch marks).

ALQ_SPZ_28_Mar_1964_orig The same zoom view as ALQ_SPZ_28_Mar_1964, but scanned instead at 300 dpi from the original seismogram, for comparison.

ALQ_LPZ_01_Apr_1964 Overall view of the ALQ LPZ seismogram beginning on 1 April 1964 for a magnitude 7.0 quake in Sumatra (delta = 134 degrees).

ALQ_LPZ_01_Apr_1964_zoom Zoom view of the ALQ_LPZ_01_Apr_1964 seismogram showing the first arrival and some large surface waves from the M 7.0 Sumatra quake.


WWSSN Film Chip Scanning Project Details

BKS 1 BKS LPN photographic record from WWSSN station at Berkeley, CA, for 29-30 Aug 1968

BKS 2 Zoom view from above BKS record showing M5.9 NTS shot, origin time 29 Aug 1968, 22 45 00.0 UTC

MAIO 1 MAIO LPN Helicorder record from SRO station at Mashhad, Iran, for 5-6 Feb 1976 Contains several long period wavetrains for earthquakes: M5.2 Kermadec, M5.6 Hokkaido, M4.7 Mariana Islands, M5.2 Fiji, M5.3 Kermadec, M4.7 Guatemala

MAIO 2 Zoom view of above MAIO record showing closeup of record stamp and traces

MAIO 3 Heliplot made from original MAIO digital data for comparison with above MAIO record

ALQ 1 ALQ SPZ photographic record from WWSSN station at Albuquerque, NM, for 19-20 Nov 1975

ALQ 2 Zoom view of above ALQ record showing PKP-series of phases from M5.8, Southern Sumatra, Origin time 20 Nov 1975, 00 50 04.7 UTC

ALQ 3 Zoom view of above ALQ record showing M6.0 NTS shot, origin time 20 Nov 1975, 15 00 00.0 UTC

GDH 1 GDH SPZ photographic record from WWSSN station at Godhaven, Greenland, for 3-4 Jun 1975

GDH 2 Zoom view of above GDH record showing M5.9 NTS shot, origin time 03 Jun 1975, 14 20 00.2 UTC

ANT 1 ANT SPZ photographic record from WWSSN station at Antofagasta, Chile, for 29-30 Aug 1968

ANT 2 Zoom view of above ANT record showing unknown earthquake

BHP BHP SPN photographic record from WWSSN station at Balboa Heights, Panama, for 29-30 Aug 1968

GOL 1 GOL SPE photographic record from WWSSN station at Golden, Colorado, for 29-30 Aug 1968

GOL 2 Zoom view of above GOL record showing M5.9 NTS shot, origin time 29 Aug 1968, 22 45 00.0 UTC


U.S. Department of the Interior
U.S. Geological Survey
Maintainer:  gs-g-cr_asl_webmasters@usgs.gov
Last update:  June 30, 2003
URL:  http://aslwww.cr.usgs.gov/Seismic_Data/FilmScans/index.htm
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