Making Non-Digitally-Recorded Seismograms Accessible Online for Studying Earthquakes - Historical Seismology: Interdisciplinary Studies of Past and Recent Earthquakes - page 412

70,000 historical seismograms recorded at Tucson, Arizona (1926-1960); College,
Alaska (1935-1956; 1959-1963), and San Juan, Puerto Rico (1946-1949; 1955-
1963) (J.W. Dewey, personal communication, 2007). The USGS in Menlo Park
began to scan about 15,000 historical seismograms recorded at San Juan, Puerto
Rico (1926-1945; 1950-1954). As a result, we are expecting a significant increase
in the number of scanned seismograms for SeismoArchives soon, and anyone can
remain updated by referring to http://www.iris.edu/seismo/.
Acknowledgments We are indebted to C.R. “Bob” Hutt who provided the information for sub-
sections 4.1 and 4.2. It was also Bob Hutt who kindly took over the WWSSN film chips collection
from USGS Menlo Park in 1997 when the collection was to be discarded, and continuously makes
efforts to scan the WWSSN seismograms. We thank Tim Knight of IRIS DMC for serving as
webmaster for the SeismoArchives.
We wish to thank Carol Prentice and Chris Stephens for their comments and suggestions on
the manuscript draft. We are grateful to Alberto Michelini and one anonymous reviewer for their
critical reviews of the manuscript, and to Julien Frechet for his excellent editing of the manuscript.
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