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Seismicity of Moldova Republic. The territory Republic of Moldova is influenced by intermediate depth earthquakes from Vrancea
seismic zone, located in Romania and local weak earthquakes. The strongest of these earthquakes are distributed on the depth
interval 70-200 km, with maximum magnitude 7.5-7.8. The maximum intensity VII-VIII (MSK-scale) is observed in Moldova. On
average, strong earthquakes of magnitude M ≥ 6 occur ten times or more per century. Some of them (November 10, 1940, March 4,
1977, August 31, 1986) caused casualties and considerable damage.
The Center of Experimental Seismology, within the Institute of Geology and Seismology, monitors seismic activity the territory of the
Republic of Moldova.
Mission of the Moldavian Seismic Network :
- Continuous monitoring of the territory of the country by means of modern digital seismic stations, participation in the global
monitoring by transmitting information to international and regional centers;
- Development and completion of numerical data base waveform, catalogs and seismic bulletins;
- Identification of macroseismic effects to determine the intensity of earthquakes with magnitude M≥5:
- Informing of the governing bodies and civil society about seismic events;
- Quick informating time (up to 2 minutes) of Railway of Moldova in order to avoid accidents in rail transport;
- Studying the behavior of typical buildings with seismic instruments;
- Ensuring fundamental and applied research with seismic data, underlying the calculation of seismic risk and development
(improvement) of the aseismic regulation documents for construction in Moldova;
-Seismic education of the population.
The seismic network of Moldova (MSN) consists of 7 seismic stations, situated in Chisinau, Milestii Mici, Leova, Cahul,
Giurgiulesti, Purcari and Soroca. The recorded data by MSN are sent to National Data Center where they are processed the
automatically Seismological Communication Processor SeisComp 3.2 and analyzed by operators. This network consists from digital
seismic stations equipped with different high quality digitizers (Kinemetrics K2,Quanterra Q330, Quanterra Q330S), broadband
sensors (CMG-40T, STS-2, Mark L4) and short period seismometers (ES-T).
The accelerometric network in Chisinau consists of 5 seismic stations equipped with Strong Motion Accelerograph
ETNA Kinemetrics (1), CMG5TD Guralp Systems (4) and is designed to monitor strong Vrancea earthquakes.
Monitoring of Seismic Hazard in Republic of Moldova
International and regional cooperation.
The exchange of data, production and processing
of seismic information IGS cooperates with the
Following foreign organizations:
1. National Institute for Earth Physics, Bucharest,
Romania;
2. URBAN-INCERC, Bucharest, Romania;
3. Institute of Geophisics NAS, Kiev, Ukraine;
4. Centre of Geophysical Monitoring NAS of
Belarus, Minsk;
5. Geophysical Survey of Russian Academy of
Science, Obninsk;
6. Kandilli Observatory and Earthquake Research
Institute, Turkey;
7. European-Mediterranean Centre, EMSC-
CSEM;
8. International Seismological Centre, ISC.
The National Data Center
Seismic Station “Soroca”
Seismic Station “Leova”
Old analog equipment
New digital equipment
INSTITUTE OF GEOLOGY AND SEISMOLOGY http://igs.asm.md
Center of Experimental Seismology Central Seismic Station “Chisinau”
Distribution of earthquake epicentres from
Vrancea region (984-2006)
Earthquakes produced in a.2014 in northern
part Republic of Moldova
Ilies Ion, head of Center, [email protected], Bejan Octavian ing. [email protected]
№
Name et of
station
Internat
ional
cod
Year of
opening
φ°, N λº, E H, m Depth,
m
1 Chişinău KIS 1949 46.9976 28.8175 185.0
2 Cahul KGL 1978 45.9053 28.2008 48.5
3 Leova LEOM 1982 46.4733 28.2467 20.0
4 Soroca SORM 1983 48.1350 28.3513 60.0
5 Giurgiuleşti GIUM 1988 45.4850 28.2081 62.5
6 Mileştii Mici MILM 2009 46.9180 28.8150 124.0 60.0
7 Purcari PURM 2013 46.5293 29.8722 39
Information on the seismic stations of the Republic of Moldova
Seismic intensity distribution in the territory of
Moldova and Ukraine,
M=5.3 earthquake of 06.10.2013
Seismic Station “Giurgiuleşti”
Seismic Station “Purcari”
Seismic Station “Milestii Mici”
EWS for Chisinau
Numarul de cutremure lunare
produse in aa.2000-2014
Name et international cod of
station
Station type
Sensor type
Recording equipment
Data transfer
Recording
Chişinău
KIS
3C SP ES-T Q330 + PCIV +
SeisComp
Internet Digital - Continuos 3C-BB CMG-
40T
3C SP CMG-5T CMG-5TD (DM-24)
- Event - Triggered
Leova
LEOM
3C SP ES-T K2 + PCIV +
SeisComp
Internet Digital - Continuos
3C-BB CMG-40T
Soroca
SORM
3C SP ES-T Q330 + PCIV +
SeisComp
Internet Digital - Continuos 3C-BB CMG-
40T
Giurgiuleşti
GIUM
3C SP ES-T K2 + PCIV +
SeisComp
Internet Digital - Continuos 3C-BB Mark
L4C
Мilestii Mici
MILM
3C SP ES-T Q330 + PCIV +
SeisComp
Internet Digital - Continuos 3C BB STS2
Purcari
PURM
3C SP ES-T Q330S + PCIV +
SeisComp
Internet Digital - Continuos
3C BB CMG-
40T
Real Time Seismic Network and instrumentation
The Common Seismic Monitoring System Romania – Moldova. In cooperation with colleagues from NIEP Romania, we have installed in 2007 new digital stations which real time recording. NIEP in Bucharest us free allocated three new seismic stations amount of $ 116,000 USD. Also, in collaboration with the same institute we have opened Moldavian National Data Center.
Data from all real-time seismic stations KIS, MILM. LEOM,GIUM, SORM, PURM are send to the Romania Data Center (RO
NDC), and data from 11 romanian real-time seismic stations BUC1, MLR, PLOR, VRI, PETR, TESR, ARCR, BUR01, IAS, TLCR,
EFOR are send to the Moldova Data Center (MOLD NDC). The communication from the digital seismic stations to the MOLD
NDC in Chisinau and RO NDC in Bucharest is perfomed through Internet.
Moldavian Network is contributing to ORFEUS EIDA with data via NIEP
National Data Center and additional products:
Real-time waveform data stored in the memory unit of the MD NDC through software SeisComp 3.2 . For ensuring data
security, data are archived and stored in parallel on a block 2TB external memory.
The SeisComp3.2 software is used for real-time data analysis and processing, also providing automatic event detection,
arrival picking, event location and magnitude calculation. It provides graphical display and automatic location within near real-
time after the local or regional seismic event occurred.
With the help of the soft SeismGram2K v5.1 processing of records of earthquakes is performed.
The software HYPOS was developed by the IGS for localization of the earthquake and determermination of focal parameters -
the basis for the regional catalog of earthquakes.
Based on seismic station "Chisinau" records reports of earthquakes and bulletins every ten days are made.
Daily reports are sent to the Geophysical Survey RAS, Obninsk, and the National Data Centre NIEP Romania.
Bulletins are sent to the International Seismological Centre, Berkshire, UK, in Geophysical Survey RAS Obninsk,
in the Carpathian Experimental Methodical Party Institute of Geophysics NASU, Lviv, Ukraine, in the seismic station
"Simferopol”, Crimea.
For moderate and strong earthquakes macroseismic survey is conducting and the maps of isoseists are compiling.
MD NDC Data Output:
- local/regional discrimination;
- event location and magnitude determination;
- email notification;
- earthquakes bulletins;
- regional catalog;
- maps of isoseists.
National Seismic Network