Mikhailova, Natalya; Poleshko, N.N.; Aristova,, I.L.; Mukambayev, A.S.; Kulikova, G.O. (2015): EMCA Central Asia Earthquake catalogue. V. 1.1. GFZ Data Services. https://doi.org/10.5880/GFZ.EWS.2015.001
Status
I N R E V I E W : Mikhailova, Natalya; Poleshko, N.N.; Aristova,, I.L.; Mukambayev, A.S.; Kulikova, G.O. (2015): EMCA Central Asia Earthquake catalogue. V. 1.1. GFZ Data Services. https://doi.org/10.5880/GFZ.EWS.2015.001
Abstract
Version History
11 Sep 2019: Release of Version 1.1 with the following changes: (1) new licence: CC BY SA 4.0, modification of the title: removal of file name and version); (2) addition of ORIDs when available. The metadata of the first version 1.0 is available in the download folder.. Data and file names remain unchanged.
The EMCA (Earthquake Model Central Asia) catalogue (Mikhailova et al., 2015) includes information for 33620 earthquakes that occurred in Central Asia (Kazakhstan, Kyrgyzstan, Tajikistan, Uzbekistan and Turkmenistan). The catalogue provides for each event the estimated magnitude in terms of MLH (surface wave magnitude) scale, widely used in former USSR countries.MLH magnitudes range from 1.5 to 8.3. Although the catalogue spans the period from 2000 BC to 2009 AD, most of the entries (i.e. 33378) describe earthquakes that occurred after 1900. The catalogue includes the standard parametric information required for seismic hazard studies (i.e., time, location and magnitude values). The catalogue has been composed by integrating different sources (using different magnitude scales) and harmonised in terms of MLH scale. The MLH magnitude is determined from the horizontal component of surface waves (Rautian and Khalturin, 1994) and is reported in most of the seismic bulletins issued by seismological observatories in Central Asia. For the instrumental period MLH magnitude was estimated, when not directly measured, either from body wave magnitude (Mb), the energy class (K) or Mpva (regional magnitude by body waves determined by P-wave recorded by short-period instruments) using empirical regression analyses. The following relationships were used to estimate MLH (see Mikhailova, internal EMCA report, 2014):
(1) MLH=0.47 K-1.15
(2) MLH=1.34 Mb-1.89
(3) MLH=1.14 Mpva-1.45
When multiple scales were available for the same earthquake, priority was given to the conversion from K class. For the historical period, the MLH values were obtained from macroseismic information (Kondorskaya and Ulomov, 1996).
Additional Information
The catalogue is distributed as a ascii file in CSV (Comma Separated Value) format and UTF-8 encoding. A separate .csvt file is provided for column type specification (useful for importing the .csv file in QGIS and other similar environments).
For each event the estimated location is provided as longitude, latitude, with the following spatial reference system: +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs
When possible, precise indication of the events´ time in UTC format are provided.
Distribution file: "EMCA_SeismoCat_v1.0.csv" Version: v1.0 Release date: 2015-07-30
Header of CSV file:
id: (int) serial ID of the event
year: (int) Year of the event. Negative years refer to BCE (Before Common Era / Before Christ) events
month: (int, 1-12) Month of the year for the event
day: (int, 1-31) Day of the month for the event
hour : (int, 0-23) Hour of the day
min: (int, 0-59) Minute of the hour
sec: (int, 0-59) Second (and hundredth of second, if available) of the minute
lat: (float) Latitude of the event
lon: (float) Longitude of the event
fdepth: (int) Focal depth of event in km
mlh: (float) Surface wave magnitude (see e.g. Rautian T. and V. Khalturin, 1994)
Authors
Mikhailova, Natalya;Institute of Geophysical Researches, Committee of Atomic Energy of the Republic of Kazakhstan, Almaty, Kazakhstan
Poleshko, N.N.;Institute of Geophysical Researches, Committee of Atomic Energy of the Republic of Kazakhstan, Almaty, Kazakhstan
Aristova,, I.L.;Institute of Geophysical Researches, Committee of Atomic Energy of the Republic of Kazakhstan, Almaty, Kazakhstan
Mukambayev, A.S.;Institute of Geophysical Researches, Committee of Atomic Energy of the Republic of Kazakhstan, Almaty, Kazakhstan
Kulikova, G.O.;Institute of Geophysical Researches, Committee of Atomic Energy of the Republic of Kazakhstan, Almaty, Kazakhstan
Contact
Ullah, Shahid; GFZ German Research Centre for Geosciences, Potsdam, Germany;
Parolai, Stefano; GFZ German Research Centre for Geosciences, Potsdam, Germany;
Pittore, Massimiliano; GFZ German Research Centre for Geosciences, Potsdam, Germany;
Contributors
Centre for Early Warning System; Ullah, Shahid; Bindi, Dino; Pittore, Massimiliano; Ullah, Shahid; Parolai, Stefano; Pittore, Massimiliano
Keywords
seimic catalogue, central asia, EMCA, GEM, earthquake
CharacterString: Version History
11 Sep 2019: Release of Version 1.1 with the following changes: (1) new licence: CC BY SA 4.0, modification of the title: removal of file name and version); (2) addition of ORIDs when available. The metadata of the first version 1.0 is available in the download folder.. Data and file names remain unchanged.
The EMCA (Earthquake Model Central Asia) catalogue (Mikhailova et al., 2015) includes information for 33620 earthquakes that occurred in Central Asia (Kazakhstan, Kyrgyzstan, Tajikistan, Uzbekistan and Turkmenistan). The catalogue provides for each event the estimated magnitude in terms of MLH (surface wave magnitude) scale, widely used in former USSR countries.MLH magnitudes range from 1.5 to 8.3. Although the catalogue spans the period from 2000 BC to 2009 AD, most of the entries (i.e. 33378) describe earthquakes that occurred after 1900. The catalogue includes the standard parametric information required for seismic hazard studies (i.e., time, location and magnitude values). The catalogue has been composed by integrating different sources (using different magnitude scales) and harmonised in terms of MLH scale. The MLH magnitude is determined from the horizontal component of surface waves (Rautian and Khalturin, 1994) and is reported in most of the seismic bulletins issued by seismological observatories in Central Asia. For the instrumental period MLH magnitude was estimated, when not directly measured, either from body wave magnitude (Mb), the energy class (K) or Mpva (regional magnitude by body waves determined by P-wave recorded by short-period instruments) using empirical regression analyses. The following relationships were used to estimate MLH (see Mikhailova, internal EMCA report, 2014):
(1) MLH=0.47 K-1.15
(2) MLH=1.34 Mb-1.89
(3) MLH=1.14 Mpva-1.45
When multiple scales were available for the same earthquake, priority was given to the conversion from K class. For the historical period, the MLH values were obtained from macroseismic information (Kondorskaya and Ulomov, 1996).
CI_OnLineFunctionCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode codeListValue=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode_information): information
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