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SDCS ER 75 15

0

(M SPECIAL DATA COLLECTION SYSTEM EVENT REPORT

Southern Iran. 7 March 1975

J R Woolson. D D Solan, M S.Dawhins, K J Hill, and R J Markle

Alexandria Laboratories

Teledyne Geotech. ZA Montgomery Street, Alexandria, Virginia 22314

September 1976

APPROVED FOP 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

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contrdctors, and this ^^^/^^"^ented .re those of the authors necessary. The views and "J f ^^ "yTep esenting the official and should not be interpreted ^ necessarily P ^^ Research

rÄ'Ä Sn^^ÄÄ-WlCtl«- Center, or the US Government.

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Unclassified stcijniTv cLASîm ATKIN OF THI F THIS PA'.f fWMfi Data Irurmii

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REPORT DOCUMENTATION PAGE 1 RtPnMT NUMBER

SDCS-ER-75-15

|l OOVT ACCESSION NO

4 Tl TL f I «"^ Sc/h(lll>-

SPEC1AJ. DATA COLLECTION SYSTEM

Southern Ira.i, 7 March 1915.

RKAI) INSTRUC TIONS BEFORE COMPLETING FOWM

3 RECIPIENT'S CATALOG NUMHt l<

5 TYPS OF RIPgRT 8 PLHIOLi OO^LKLiJ

(SDgS)I|g>«t êpgrT. y /Technical ^y^..^ i

*UTHOBf«J

Woolson, J. K., Solarl, Do D., Dawklns, M. S. Hill, K. J., and Markle, R. J.

/

6 PERFORMING ORG REPORT NUMBER

• CONTRACT OR GRANT NUMBtR'M

Fd8606-74-C-0013)

9 PERFORMING ORGANIZATION NAME AND ADDRESS

Teledyne Geotech / 314 Montgomery Street Alexandria, Virginia 22314 W M CONTROLLING O' 'ji NAME AND ADDRESS

Defense Advam -d Research Projects Agency Nuclear Monl'jring Research Office 1400 Wilson Blvd.-Arlington, Virginia 22209

il "Tl MONITORING AGENCY NAME » ADDRESSC/» dill»,enl Irow Con(rol//n« Olhcr,

VELA Seisraological Center /^~\ t * 312 Montgomery Street V'^jJZ.'l)* 1 Alexandria, Virginia 22314 f j

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12 BEPORT DATE

12 SepWiaMPM»75 U NUMBfR nr PAGES

16 SECURITY CLASS (ul Ihls rep'.rr,

Unclassified

15« DECL ASSIFICATION DOWNGRADING SCHEDULE

7?

16 JlSTRlBllTlON STATEMENT fol this Repmlj

APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED.

J. R. /Woolson, D. D. /Solflri, M. S. 0awk<ns, K. ). /Hill

L nHSürmww STATEMENT M HZ .**,f*J!j_Jj_/!!'*rk]^/^^^^^^pT

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1

18 SUPPLEMENTARY NOTES

II . » '

19 (EV WORDS 'Cnnl/nue on raMWM »ide H nece.-'ary *nd Idenllly hy block „umb.r)

ft

20 ABSTRACT rrnnKnue on r^ver.« «ide // necrstary and Idenltly by block number)

[)Q FORM ]473 EDITION OF I NOV 65 IS OBSOLET!

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Unclassified /^V 5 &> OS- ' SECURITY CLASSIFICATION OF THIS PAGE fW»W1 f»«f« ^"'rr.■ .' Jj<

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SUCS Event Report No. 15

V Southern IranS 7 Marci 19 75

\ MM event report contains seismic data from System (SDCS), and other sources for the akave information from seismic observations is:

e Special Data Collection event.. Publisl.id epicenter

\

Origin Time Latitude Longitude n^

NORSAR LASA PDE Hagfors Array, Sweden

07:04:36 07:05:20 07:04:43 07:04:16

26.6N 34.3N -^.SN 24 N

056.7E 051.2E 056.3E 057 E

5.8 5.3 5.8 6.2

M s

N/A N/A 6.1 5.7

Source parameters, other than magnitude (» = 6.2, Ms = 5.4), were not

calculated for the SDCS and Arrays due to limited data.

FN-WV and CPSO were not operational for this event.

Short-period siganls associated with this event were recorded Jt MW», WH2YK, LASA and NORSAR. The signal was not observed at HN-ME due to low magnetic tape input levels. An unresolved time correction at RK-ON

precluded determination of a hypocenter.

Lone-period signals were recorded at RK-ON, WH2YK and HN-ME. The LPT chaLe! at HN-L was inoperative. Array long-period data was unrecoverable.

FN-WV, RK-ON, WH2YK, and HN-ME horizontal instruments are oriented ,-adial ™d transverse to the Nevada Test Site. CPSO is ên^ä HJ Ê-U I ASA, NORSAR, and ALPA beams have been rotated to radUl and transverse with

respect to the event location.

Scaling factors on plots are millimicrons at 1 H. (not correct for instrument rôonse) with the exception of LASA and NORSAR short-period plots. LASA SP slling factors are millimicrons per inch. Scaling factors are not reported

for NORSAR short-period.

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DATA SUMMARY

Sta. Phase Arrival Time

Inst. Per A/T Magnitude

% Ms

Distt

NAO EP 07:12:56.5 AH 1.2 388.6 6.01 45.2

HN-ME Lk 07:59:07 LPZ 23.0 275.1 5.52 91.0

WH2YK KF 07:17:48.5 SPZ 1.2 80.2 5.70 91.6

Lg 07:58:36 LPT 26.0 Clipped

LR 08:07:13 LPZ 20.0 29.3 4.55

RK-ON EP 07:30:46.4** SPZ 1.5 50.0 6.86 97.6

LR 08:19:33 ** LPZ 22.0 236.4 5.87

LAO EP 07:18:47.6 AB 1.3 52.8 6.07 104.5

Average m. = 6.16 (4 stations)

Average M =5.38 (3 stations)

* Distance calculated from PDE location. **Time correction approximately -13 minutes.

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NORSflR EVENT FILE 1975 MflR 7

EPX NO. 91160 RRR 7.12.58.1 2b.bN 5b. 7E 5.7MB 33KM

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LASA 7 M5R99731.5N 50.6E 330 C 6.2 3^6 IRAN 7 18 48.2 LflO P 21.9 1.3 ZD.U 99.5 19.9

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