Seismological station ZAGREB (ZAG)

108 years

Croatian Seismological Service(Mohorovičić to) present day

Seismological station ZAG - milestones•1861 Beginning of meteorological measuring. Geophysical

Institute was founded.•1880 The great Zagreb earthquake.•1892 A. Mohorovičić Director of the Geophysical Institute.•1906 First seismograph in Zagreb (Vicentini), station ZAG.•1909 Mohorovičić discover the disontinuity: crust/mantle

boundary.•1948 Geophysical Institute is a part of Faculty of Science.

Croatian Seismological Service - milestones

• 1985 Croatian goverment promotes: Law on seismological activity.Therewith Croatian Seismological Service was founded in a frame of Geophysical Institute of Faculty of Science.- 8 Seismologists, (Today 6)- 3 Seismic stations (ZAG, PTJ, HVAR)

• 1989 Modern broadband digital seismographs were installed atstations ZAG, HVA and DBK.

• 2015 The data of 16 ordinari public seismological stations and of 7 temporary stations are on dispose in CSS. 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015

ZagrebLabinHvar

OborovoPuntjarka

VirMuškovci

JagnjedovciTrilj

AljmašDalj

LjubotićDubrovnik

RažanjBranjina

G. StolKosinj

JavorovacKutjevo

OrahRijeka

GljevMuć

StravčaMaoviceDragove

KijevoKijevoSisak

NovaljaPožega

StonSlunj

KukačaČačvina

VeprinacBrijuni

UdbinaŽirje

RičiceKalnik

Dugi OtokMorićiOzalj

MakarskaMoslavina

Lastovo

Station

Year operated

Croatian Seismological Service In last 10 yaears: o Number of stations x3o Located earthquake x10o Stuff is reduced 8 to 6!

1990 1995 2000 2005 2010 2015 2020

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9756

Accelerometric networkIn 1985 there were 21 analog accelerographs and drop to only 8 digital instruments in 2015 that are active and sited in:

• Dubrovnik (SIG) x3, • Makarska(ETNA) x1, • Ričice Dam (SSA-2) x2 priv.,• Ston (ETNA) x1 and • Zagreb (Guralp) x1.

Croatian Seismological Service GSM - 4

DSL - 3

SAT - 8

CARNet - 8

Instruments:Guralp - SCREAM

Lennartz&Guralp--SCREAM

STS-2&Q330&-SeisComP

Croatian Seismological Service

Acquisition: Guralp – SCREAM *.gcf - format

Croatian Seismological Service

Stations: HVAR BRIJUNI

SeisComp

SANDI.gcf_1

SANDI.gcf_2

miniseed

gcf

NRT-Data exchange

ORFEUS

STATIONS.gcf

Croatian Seismological ServiceSoftware: SANDI – Seismological Analysis and Display(Developed in Geophysical Institute – Zagreb)

CROATIAN SEISMOLOGICAL SERVICEThe first result of 135 years of seismology in Croatia and 30 years of CSS is a catalog of about 80 000 earthquakes in period 373 BC.

Earthquake CatalogueSpatial completeness, by year

1850. 1925.

Croatian Seismological Service

Croatian Seismological ServiceThe second result of 135 years of seismology in Croatia is Seismic hazard mapGround accelerations that can be exceeded with 10% probability in 50 years (Tret=475y).Map is ploted for norm EUROCODE-8 for constructions in seismic active area

For Zagreb area the exceedance accelerations are [0.20-0.28] g/50y with 10% prob.

Population density

http://seizkarta.gfz.hr/karta.php

Croatian Seismological ServiceDAILY AND URGENT

1. MAINTENANCE AND SERVICING SEISMOLOGICAL STATIONS AND CENTRES,

2. DETERMINATION OF EPICENTER AND MAGNITUDE OF LOCAL EARTHQAKES,

3. ESTIMATION OF INTENSITIES (effects of earthquakes),

4. INFORM: - NATIONAL PROTECTION AND RESCUE DIRECTORATE (112 DUZS),

- CITY OFFICE OF EMERGENCY MANAGEMENT (UHS-ZAGREB),

- PUBLIC MEDIA (LOCAL WEB SITE, RADIO, TV, NEWSPAPERS...),

5. SEND DATA TO CSEM (Strassburg), and other centres,

6. MACROSEISMIC DATA (MCS or EMS) AQUSIOTION BY INTERWIEV, PHONE,

EMAIL,...

7. Working day: 7-21h public duty, 21-07h by emergency call from 112.

8. Saturday: 7-14h public duty, Sat. 14 -Mon. 7h by emergency call from 112

• Research in Seismicity • Scientific research

• Engineering seismology• Sesismological monitoring of dams

• Uni education

Colaborations and projects:• CSS & CSEM,• CSS & ORFEUS,• CSS & CE3RN,• CSS & AlpArray,• NATO-BSHAPE-3,• HOLISTIC (Hazard –

dynamical parameters of important building in Dubrovnik county),

• Microzoning northern part of city of Zagreb,

• VELEBIT – (Seismicity of Velebit mountain – Cro. Sci. Foundation).

Croatian Seismological Service

Data exchange:

To: - Acad. Sci. CZ Rep.- Acad. Sci. Hungary- ARSO Slovenia- BiH – Banja Luka- GFZ Potsdam- INGV Roma- INGV Milano- S.S. Serbia- UNI Trieste (OGS)- UNI Udine- ZHMS Montenegro

From:- Acad. Sci. Hungary- ARSO Slovenia- BiH – Banja Luka- INGV Roma- S.S. Serbia- ZHMS Montenegro

Spring at ZAG

ESTABLISHING SEISMIC STATION IN ZAGREB - CROATIA

• Seismograph Vicentini-Konkoly was installed on april 4. 1906, so the seismological station Zagreb came into existence. Only two weeks later on

april 18 1906 the S. Francisco earthquake was recorded. Mohorovičić’s analiysis of that record (left).

Croatian Seismological Service

Seismic station Kalnik

Seismic station MOSLAVINA

DUOK (MEDSEA –Station; closed)

HVAR (was MEDSEA-station)

http://oh.geof.unizg.hr/index.php/en/about-hvar-observatory/hvar-history

Seismological station �ZAGREB (ZAG)�108 years ��Croatian Seismological Service�(Mohorovičić to) present daySeismological station ZAG - milestonesCroatian Seismological Service - milestonesSlide Number 4Croatian Seismological Service Slide Number 6Slide Number 7Croatian Seismological ServiceCroatian Seismological ServiceSlide Number 10Croatian Seismological ServiceCroatian Seismological ServiceSlide Number 13ESTABLISHING SEISMIC STATION IN ZAGREB - CROATIACroatian Seismological ServiceSeismic station MOSLAVINA