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AD-A020 875

SPECIAL DATA COLLECTION SYSTEM EVENT REPORT. EASTERN KASHMIR, 28 APRIL 1975

J. R. Woolson, et al

Teledyne Geotech

Prepared for:

Air Force Technical Applications Center

October 1975

DISTRIBUTED BY:

mi] National Technical Information Service U. S. DEPARTMENT OF COMMERCE

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SDCS ER 75 28

N 00 o O < s

SPECIAL DATA C0LLECT50N SYSTEM EVEKT REPORT

Eastern Kashmir. 28 April 1975

J R.WooUan. DO Solan. M S Dawliins. K J Hill, and R J Marhle

Alexandria Laboratories

Teledyne Geotech. 314 Montgomery Street. Alexandria. Virjinia 22314

October 1975

APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED

Sponsored By

The Defense Advanced Research Projects Agency

Nuclear Monitoring Research Office

1400 Wilson Boulevard. Arlington . Virginia 22209

ARPA Order No 2897

Monitored By

VELA Seismological Center

312 Montgomery Street. Alexandria. Virginia 22314

>t5 D C If 1976 1

I U U L-i\±L

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«•produced by

NATIONAL TECHNICAL INFORMATION SERVICE

U S Dtportmtnf of Commtrca Springfield VA 32151

£0 - . -. - -

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Disclaimer: Neither the Defense Advanced Research Projects Agency nor the Air Force Technical Applications Center will be responsible for infornation contained herein which has been supplied by other organizations or contractors, and this document is subject to later revision as may be necessary. The views and conclusions presented are those of the authors and should nut be interpreted as necessarily representing the official policies, either expressed or implied, of the Defense Advanced Research Projects Agency, the Air Force Technical Applications Center, or the US Government. ,

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UnrlAsaifipri SECURITY CLASSIFICATION OF THIS PAOE fWhmii Dmlrn Fnfrrdl

REPORT DOCUMENTATION PAGE ' REPORT NUMBER

SDCS-ER-75-28 2 GOVT ACCESSION NO

* TITLE mnrf Submit)

SPECIAL DATA COLLECTION SYSTEM (SDCS)

Eastern Kashmir, 28 April 1975

7 AUTHORC«;

Woolson, J. R., Solari, D. D., Dawkins, M. A., Hill, K. J., and Markle, R. J.

9 PERFORMING ORGANISATION NAME AND ADDRESS

Teledyne Geotech 314 Monugomery Street Alexmtdria. Virginia 22314

" CONTROLLING OFFIC."- NAME AND ADDRESS

Defense Advanced Research Projects Agency Nuclear Monitoring Research Office 1400 Wilson Blvd.-Arlington. Virginia 222ng

14 MONITORING AGENCY NAME ft AODRESSCIf dlllmrmnl from Conlrolllnt Oilier)

VELA Seismological Center 312 Montgomery Street Alexandria, Virginia 22314

READ INSTRUCTIONS HEFOHK COMPI.ETINt; KORM

3 RECIPIENT^ CAT AL OG NUMBf R

S TYPE OF REPORT « PERIOD rovFRFn

Technical

6 PERFORMING ORG REPORT NUMBER

• CONTRACT OR GRANT NUMBERS

F08606-74-C-0013

to PROGRAM ELEMENT PROJECT TASK' AREA « WORK UNIT NUMBERS

T/4703

II REPORT DATE

17 November 1975 tl NUMBER OF PAGES

Jio. IS SECURITY CLASS Co/ Ihlt impnrli

Unclassified

tSa DECL ASSIFIC ATION DOWNGRADING SCHEDULE

16 DISTRIBUTION STATEMENT lol Ihlt Rtpnrlj

APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED.

'7 DISTRIBUTION STATEMENT (ol Ih» ••)«tr«rl rnlrrmd In Blnck i0, II dlllmrenl Irom R»porl)

18 SUPPLEMENTARY NOTES

19 KEY WCRDS fCnntlnu* on »*»f < mtl» il n*c***mry mnd Idtnlllv ^v hlnch number)

20 ABSTRACT tConllnut on rmvtun» *id* II necffiaarv »nd idtnlllv hv blork number)

DO I JAN 73 ^473 EDITION Of t NOV 6S IS OBSOLETE * Unclassified

SECURITY CLASSIFICATION OF THIS PAOE flWien tlmlm Fnlrrr.h

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SDCS Event Report No. 28

Eastern Kashmir, 28 April 1975

Thia event report contains seismic data from the Special Data Collection System (SDCS), and other sources for the above event. Published epicenter information from seismic observations is:

Origin Time Latitude Longitude m. b

M s

NORSAR 11:06:47 36 N 079 E 5.5 N/A LASA 11:07:03 39.9N 078.IE 5.5 N/A PDE 11:06:44 35.8N 079.9E 5.8 6.3 Hagfors Array, Sweden 11:07:03 38 N 077 E 5.6 6.1

Using SDCS stations, LASA and NORSAR, the epicenter location and magnitudes become

11:06:37.8 35.3N 079.6E 5.5 5.8

All SDCS stations were operational during this period.

Short-period signals associated with this event were recorded at WH2YK, RK-ON, LASA and NORSAR. High level background noise prevented definite determination of signal arrivals at HN-ME, FN-WV and CPSO. Horizontal channels at FN-WV were not rotated due to unknown instrument orientation.*

Long-period signa s were recorded at all SDCS stations. At HI'-ME the LP transverso channel operated at an unknown gain. Horizontal channexs at FN-WV were not rotated due to unknown instrument orienta-.ion.* Horizontal channels at WH2YK were not rotated due to signal clipping. LP array beam data were unrecoverable.

Scaling factors on plots are millinicrons at 1 Hz (not corrected for instrument response) with the exception of LASA and NORSAR short-period plots. LASA SP scaling factors are millimicrons per inch. Scaling factors are not reported for NORSAR short-period.

*Due to operational problems the instrument hole lock was repositioned and the known orientation lost. Situation corrected 24 May 75 when the instrument was moved to a new borehole.

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