10010

0

20020

0

30030

0

40040

040

0

50050

0

60060

060

0

70070

0

80080

080

0

90090

0[m

s][m

][m

s]

050

100

150

200

250

300

350

400

450

500

550

[m]

Figure

2.

A01

A01

A01

A01

A01

A01

A02

A02

A02

A02

A02

A02

S01Z

S01Z

S03Z

S03ZS02Z

S02Z

S04Z

S04Z

S05Z

S05Z

S06Z

S06Z

Depth

FigAn

examp

lefor

theVe

locity

analys

ispane

lure

7.

FigSta

cking

sectio

nure

8.tim

e

Figure

5.Lo

cation

mapo

fther

eflect

ionsp

rofiles

Figure

1.Lo

cation

mapo

fthete

starea

Figure

6.Re

ftek1

25rec

order

CTBT

OOn

-siteI

nspect

ionDiv

isiono

rganis

edan

Advan

cedCo

ursefo

rpote

ntialp

articip

antso

fthe

Integr

atedF

ildEx

perim

ent(A

S-IFE

08)in

period

of21

Octob

er-2

Novem

ber200

7in

Peace

Suppo

rtCent

re(Szo

lnok,H

ungary

)andin

aneig

hbouri

ngilit

aryare

ainT

áborfa

lva.

ASei

smicA

ftersh

ockMo

nitori

ngSy

stem(

SAMS

)tes

twas

carrie

dout

inTá

borfa

lva(H

ungary

)inord

erto

analys

ethe

detect

ionthr

eshold

s,nois

elev

elsand

geolog

icalco

nstrai

ns-w

ithsim

ulated

seism

iceven

ts(Fi

gure1

.)At

eight

locati

ons

twenty-

nine

ofsm

allund

ergrou

ndexp

losion

s(50-1

00-200

-400-8

00g

TNT)

were

deton

ated

torep

roduce

week

afters

hocks

aiming

atdete

ction

events

below

magnitu

dezer

o.Fie

ldins

tallatio

noftw

omini

-arr

ays(Fi

gure

1.,AC

01,AC

02)and

eight

three-

componen

tsingl

estati

ons(Fi

gure1

.,S01-S0

8)det

ected

thegen

erated

signal

s.Fin

allyon-

sitedat

aana

lysis

foreve

ntide

ntific

ation

was

succes

sfully

includ

edin

thetra

ining

progra

m-

SAMS

team

wasa

bleto

recogn

iseall

genera

tedaft

ershoc

ks.

ethe

m .

of

Thea

ctives

ource

seism

icrefl

ectivi

tymeth

odiso

neof

theapp

roved

CPTt

echnol

ogies

.Noo

therm

ethod

proces

sessuc

hares

olutio

npow

ertoim

agethe

under

groun

dand

itsnat

ural-o

rman-

made

distur

bances

(e.g.C

avities

,fault

s,etc)

.8

Thed

etailed

imagi

ngoft

heupper

00ms

edime

ntarys

trataw

ascarr

iedout

along

a600

mlong

profile

using

30sm

allexp

losion

swith

300ge

xplos

ivesin

3mdee

pbore

holes.

Aline

ofsin

gle,on

e-com

ponen

tgeoph

onesw

erelaid

outat1

0mspa

cinge

ach.A

utonomo

us(ca

ble-fre

e)sei

smicrec

orders

were

deploy

edateac

hgeop

honeloca

tion-

with

contin

uousd

etectio

nofseis

mics

ignals

with

high

sampli

ngrat

e.

Dataa

cquisit

ionpar

amete

rsalon

gthe

longer

line

eophone

distan

ce:10

mum

berof

receiv

ers:

61uni

tsum

berof

shoots

:30d

eptho

fshoot

s:3m

harge

ofsho

ots:

300gT

NTam

plerat

e:2m

s

g n n c s

Thep

rocess

ingflo

wwa

sdesi

gnedt

ofoll

owthe

conven

tional

seism

icproc

essing

steps

threfo

rewe

wanttoche

ck,we

ather

anyoth

ernon

conven

tional

cumputati

onnec

essary

forthe

given

acquis

ition.

Thep

rocess

ingcon

sist

of:Ge

ometr

ydefi

nition

Editin

gMu

teing

Band

passfi

lter(25

-30-13

0-150)

Truea

mplitu

derec

overy

AGC

Decon

voluti

on(M

in.pha

sespi

king)

Twop

assvel

ocity

aalys

isTw

opass

residu

alstati

ccorr

ection

Stacki

ngF-x

decon

ed n

is

Asthe

figure

sabov

eshow

wehav

egot

afai

rlygoo

dqual

ityrec

ordsf

orpro

cessin

g,and

achiev

edan

interp

retabl

esta

cking

sectio

n,with

outex

traeff

ort.

Theo

utset

ofPa

rrivals

were

picked

withH

YPOL

INE

softwa

re(Fi

gure2

.,Figu

re3.)

.The

Sphas

escan

notbe

recogn

isedb

ecause

ofnea

r-sur

faceg

enerat

edgro

und-

rollw

avesa

ndstro

ngref

lectio

ns.Th

eHYP

OELL

IPSE

softwa

re[La

hr,199

9]wa

sused

todet

ermine

theeve

ntloc

ations.

Ther

esults

canbe

seeno

nthe

Figure

4.Th

eave

ragee

rrorof

theeve

ntsloc

ations

was2

60m.

Thea

ccurac

yofth

eeven

tdete

ctionw

asabo

ut100

min

thecen

tralpa

rtand

300ma

tthep

erime

terof

thetes

tarea.

Thel

ocated

events

arema

rkedw

ithpur

pledia

monds

(Figur

e4.)

Thev

elociti

eswe

reder

ivedf

romthe

reflec

tionv

elocity

analys

is.(Fi

gure7

.)

OS

I-31/B

FE

-S

eism

icie

ldx

erci

se a

tA

CIF

E0

8 i

n H

un

ga

ryA

ttil

a C

saba

Kovác

s E

ndre

Zolt

án H

eged

űs,

Tib

or

Gúth

y, R

ber

t C

sabaf

i,

ó

Eötv

ös

Lorá

nd G

eophysi

cal

Inst

itute

of

Hungar

y