Carnegie DTM

Between 1965 and 2003, the Carnegie Institution of Washington’s Department of Terrestrial Magnetism operated a continuous network of nine broadband seismographs with a cluster in South America and Japan, and stations in Iceland, Papua New Guinea, and Washington, D.C. The Carnegie seismographs designed in the 1960s by Selwyn Sacks were among the earliest broadband instruments and designed to record ground motion from 30 s and ∼ 30 Hz with high dynamic range and low distortion.

Carnegie EPL

Stations

Region	Location	Code	Latitude	Longitude	Timespan	Components
Andes	Cusco, Peru	CUS	-13.563	-71.877	1966–1986	3
Toconce, Chile	TCC	-22.275	-68.172	1965–1971	3
Trujillo, Peru	TRU	-8.078	-78.861	1967–1986	1
Japan	Kamikineusu	KMU	42.238	142.967	1967–1996	3
Matsushiro	MAT	36.543	138.207	1967–1984	3
Sawauchi	SWU	39.490	140.790	1984–1996	3
Other	Akureyri, Iceland	AKU	65.686	-18.099	1972–2003	3
Port Moresby, Papua New Guinea	PMG	-9.406	147.159	1966–1992	1
Washington DC	DTM	38.959	-77.063	1966–1994	3

Instrumentation

Broadband. See Sacks (1966).

Recording Medium

Magnetic tape – unmodulated with ACC bias.

Data Availability

Data will be made available in SEED format through IRIS DMC.

See Supplement in Golden et al. (2020) for information on digitization of AKU, CUZ, and MAT.

Contact

For more information about this collection, please contact: < blank >

References

Golden, S., L. S. Wagner, B. Schleigh, D. Power, D. C. Roman, S. I. Sacks, and H. Janiszewski (2020). Digitization of the Carnegie Analog Broadband Instruments Tape Records (1965–1996), Seismol. Res. Lett. 91, 1441–1451, doi: 10.1785/0220190334.

Sacks, I. S. (1966). A Broad-band large dynamic range seismograph, in The Earth beneath the Continents, J. S. Steinhart and T. J. Smith (Editors), Geophysical Monograph, Vol. 10, American Geophysical Union, Washington, D.C., 543–553, doi: 10.1029/GM010p0543.