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A U.S. DEPARTMENT OF COMMERCE National Technical Information Service

AD-A02^ 595

SPECIAL DATA COLLECTION SYSTEM (SDCS) EVENT REPORT.

EASTERN KAZAKH SSR. 25 DECEMBER 1975

TELEDYNE GEOTECH

PREPARED FOR

AIR FORCE TECHNICAL APPLICATIONS CENTER

10 MARCH 1976

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SDCS ER-75-68

W.5104

SPECIAL DATA COLLECTION SYSTEM EVENT REPORT Eastern Kazakh SSR, 25 December 1975

KJ. Hill, M.S. Dawkins, R.R. Baumstark, and M.D Gillispie

Alexandria Laboratories

Teledyne Geotech, 314 Montgomery Street, Alexandria, Virginia 22314

March 1976

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 223» \ T REPRODUCED BY

NATIONAL TECHNICAL INFORMATION SERVICE

U.S. DEPARTMENT OF COMMERCE SPRINGFIELD, VA. 22161

D D C fTprPnn nf?_p MAY 20 1976

ElSEUinS B

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1 Unclassified

SECURITY CLASSIFICATION OF THIS PA^.r 'Wh^n Dmlm Enlrredj

REPORT DOCUMENTATION PAGE KKAD INSTRUCTtOSS BEFORE COMPLETINr, KORM 1 KfcPOKT NUMBLH

SDCS-ER-75-68

2 OOVT ACCESSION NO. 3 RECIPIENT'S CATALOG NuMHF R

4. TITLE fanJ Subf/(/oJ

SPECIAL DATA COLLECTION SYSTEM (SDCS)

Eastern Kazakh SSR, 25 December 1975

5 TYPE OF REPORT & PERIOD CO^ERf D

Technical

6 PERFORMING ORf. REPORT NUMBER

7. AUTHOflf«;

Hill, K. J., Dawkins, M. S., Baumstark, R. R.

and Cillispie, M. D.

8 CONTRACT OR GRANT NJMBtR.«)

F086Ü6-74-C-0013

9. PERFORMING ORGANIZATION NAME AND ADDRESS

Tcledyne Geotech 314 Montgomery Street Alexandria, Virginia 22314

10 FROG fXM ELEMENT PR-JICT T AL« AREA ft «ORK UNIT NUMBERS

T/4703

11, CONTROLLING OFFICE NAME AND ADDRESS

Defense Advanced Research Projects Agency Nuclear Monitoring Research Office 1400 Wilson Blvd.-Arlington, Virginia 22209

12 REPORT DATE

10 March 1976 1J NUMÜEP OF PAGES

16 14. MCNI CORING AGENCY NAME 4 ADDHtSG'/f dlllr'enl Irnm Conlrolllng Cllic»)

VELA Seismological Center 312 Montgomery Street Alexandria, Virginia 22314

'S SECURITY CL ASS 'C.I thtt report,

Unclassified 15« DECL ASSlF:r AT'ON LJ*NGRADlNG

SCHEDULE

16 DISTRIBUTION STATEMENT (of Ml« Report)

APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED.

17. DISTRIBUTION STATEMENT (al Ih» mbtlrtcl entered In Black 20, lldtllerenl Irom Report)

18. SUPPLEMENT ARY NOTES

19. KEY WORDS (Continue on reverie tide II neceaeary end Identify by block number)

20 ABSTRACT (Continue on reveree aide II nrceeeery end Identity by block nurrber)

^D ) JAN 71 1473 EDITION OF 1 NOV 65 IS OBSOLETE Unclassified SECURITY CLASSIFICATION OF THIS PAGE (Wh** Vfil» tnt*t*d}

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Lat. Long . mb M s

50 N 078 E 6.3 N/A 50 N 084 E 6.9 N/A

SDCS EVENT REPORT '10. 6 8

Eastern Kazal- SSR, 25 December 1975

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

"P" Arrival Origin Time

NORSrtR 05:24:19.7 05:17:03 Hagfors 05:24:10.2 05:16:39

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

05:16:57.4 49.8N 078.8E 5.8 3.2

All SDCS stations were operational during this period.

Short-period signals associated with this event were recorded at all SDCS stations, LASA and NORSAR. Horizontal SP channels at all SDCS stations were rotated. NORSAR "P" arrival was obtained from their bulletin; the TAL transmission was not recoverable.

ALPA recorded a long-period signal for this event. LP signals were masked by Iceland Event at RK-ON, CPSO, FN-WV, and HN-ME. WH2YK and NORSAR did not record LP signal arrivals for this event and were not included in this report. Polarity of the LP radial channel at RK-ON was reversed; to correct this, a mathematical inversion of the LP radial data was performed before the hori- zontal channels were rotated. Horizontal LP channels at CPSO, HN-ME, KK-ON, and FN-WV were rotated. Validity of the ALPA long- period vertical beam is uncertain and horizontal beams weie not included because of program recovery problems. LASA long-period data were not included because of complicated recovery procedures

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

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HYPOCENTER DETERMINATION

INPOT FOR EVENT 25 DEC 75 05:17:00.0 50.000N 80.000E OKH.

FESIDDA1S DIST. AZ. STA. AKFIVA1 CA1C BEST REST REST NAG 05 24 19.7 -0.1 -0.1 38.5 313.1 WH2TK 05 27 t»8.2 0.2 0.2 66.6 17.3 FK-ON 05 29 0U.3 -0.8 -0.8 79.6 355.1 HN-HE 05 29 09.4 0.9 0.9 80.2 337.2 1ÄO 05 29 27.9 0.2 0.2 83.8 3.4 PN-VJV 05 29 57.9 0.1 0.1 90.0 3a3.1 CPSO 05 30 15.a -0.5 -0.5 93.9 3a7.2

67 HBEEIN TPAVI1 TIME TAB1ES

ORIGIN LAT. 05:16:5".0 a9.668N 05:16:57.U a9.765N

LONG. DEPTH (KM) 7e.787E -18. CALC 7e.75lE 0. REST

SDV IT STA 0.5 10 7 0.5 3 7

CAIC U . 2

1 . 0 0 0. 0 0

0 o! 0 0 0 . 0

0 . 0

REST 4 . 2

1 . 0 0 0. 0 0

0 0. 0 0 0 . 0

0 . 0

CHI2 COVERAGE ELLIPSE; 95 PER CENT CONF..LrVEL, SDV= 0,92 HAJOF 165.1KM. HINOF 40.7KH. A2;= 179 AREA= 21122 SQ.KH. REST

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DATA SUMMARY

05 INPUT FOF EVENT

17:00.0 50.000N 25 DEC 7^

80.000E OKM.

APBIVRL STAj. PHASE TIME INiTT PEP A^

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EP LP

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0.6 22.0 0.9 0.6 0.9 1.0 0.8 0.8

OPT^TN IRT. LONG. 05:16:^4.0 49.^^8« 78.7e7E 05:16:57.« U9.765N 78.7MF

HAGNITTDE MB US PIP DIST

845. 6.08 "«.^ 2. 3.20 59.8

156. 5.89 66.6 110. 5.U8 7?.^ 133. 5.56 ^0.2 232. 6.07 93.8 «3. 5.3 3

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