Earthquake with magnitude of Md 3.9 on date 15-12-1991 and time 05:52:21 (UTC) in region 3 km N Aiello Calabro (CS)

A magnitude Md 3.9 earthquake occured in region: 3 km N Aiello Calabro (CS), on

  • 15-12-1991 05:52:21 (UTC)
  • 15-12-1991 06:52:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 39.1460, 16.1740 at 8 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Lago CS 3 2624 2624
Aiello Calabro CS 3 1729 4353
Cleto CS 3 1301 5654
San Pietro in Amantea CS 5 505 6159
Grimaldi CS 5 1680 7839
Malito CS 7 783 8622
Altilia CS 7 711 9333
Serra d'Aiello CS 7 458 9791
Amantea CS 8 13975 23766
Domanico CS 8 943 24709
Belmonte Calabro CS 8 2003 26712
Martirano Lombardo CZ 9 1112 27824
Martirano CZ 9 884 28708
San Mango d'Aquino CZ 10 1564 30272
Belsito CS 10 923 31195
Longobardi CS 11 2312 33507
Carpanzano CS 11 255 33762
Scigliano CS 12 1226 34988
Paterno Calabro CS 12 1398 36386
Marzi CS 12 989 37375
Motta Santa Lucia CZ 12 845 38220
Pedivigliano CS 12 831 39051
Nocera Terinese CZ 12 4731 43782
Dipignano CS 12 4376 48158
Conflenti CZ 13 1392 49550
Carolei CS 13 3330 52880
Mendicino CS 13 9450 62330
Rogliano CS 14 5637 67967
Fiumefreddo Bruzio CS 14 2994 70961
Santo Stefano di Rogliano CS 14 1725 72686
Cerisano CS 14 3196 75882
Mangone CS 15 1891 77773
Falerna CZ 16 4028 81801
Cellara CS 16 504 82305
Falconara Albanese CS 16 1427 83732
Figline Vegliaturo CS 16 1137 84869
Piane Crati CS 16 1423 86292
Marano Principato CS 17 3180 89472
Aprigliano CS 18 2890 92362
Cosenza CS 18 67546 159908
Castrolibero CS 18 9894 169802
Soveria Mannelli CZ 19 3076 172878
Gizzeria CZ 19 4982 177860
Marano Marchesato CS 19 3553 181413
Decollatura CZ 19 3159 184572
Pietrafitta CS 19 1310 185882
Colosimi CS 20 1247 187129

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km SW of Cosenza (67546 inhabitants)
23 Km NW of Lamezia Terme (70714 inhabitants)
45 Km NW of Catanzaro (90612 inhabitants)
83 Km W of Crotone (62178 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 3.9
ML-VAX 3.7
1991-12-15
05:52:21
39.146 16.174 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 155139
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-12-15 05:52:21 ± 0.5
Latitude 39.1460 ± 0.0096
Longitude 16.1740 ± 0.0139
Depth (km) 8 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 155139

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 1603.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 121
Number of defining phases 121
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00469
Epicentral distance of station farthest from the epicenter (degree) 0.08645
Number of stations at which the event was observed 91
Number of stations from which data was used for origin computation 91
Magnitudes information

Md:3.9

Field Value
Value 3.9
Uncertainty
Num. used stations 9
Type of magnitude Md
Reference to an origin 155139
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:24:53

ML:3.7

Field Value
Value 3.7
Uncertainty
Num. used stations 32
Type of magnitude ML
Reference to an origin 155139
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.SBF.Z. 1991-12-15T05:55:42.60 10.0 undecidable manual SN 308 8.0475 -1.68 0.1
--.VOY.Z. 1991-12-15T05:55:22.90 10.0 undecidable manual SN 347 7.0707 1.85 0
--.VBY.Z. 1991-12-15T05:55:05.00 10.0 undecidable manual SN 354 6.3825 0.42 0.6
--.RIY.Z. 1991-12-15T05:55:03.90 10.0 undecidable manual SN 348 6.327 0.71 0.5
--.PGF.Z. 1991-12-15T05:55:03.00 10.0 undecidable manual SN 304 6.3936 -1.81 0.1
--.MLR.Z. 1991-12-15T05:54:42.00 10.0 undecidable manual PN! 45 9.6015 2.2 0
--.LPL.Z. 1991-12-15T05:54:41.00 10.0 undecidable manual PN! 315 9.4239 3.46 0
--.VAY.Z. 1991-12-15T05:54:39.40 10.0 undecidable manual SN 63 5.328 -0.23 0.7
--.BNI.Z. 1991-12-15T05:54:35.45 10.0 undecidable manual PN 313 9.1686 1.42 0.2
--.SRO.Z. 1991-12-15T05:54:29.40 10.0 undecidable manual PN 9 8.7912 0.67 0.7
--.SKO.Z. 1991-12-15T05:54:29.70 10.0 undecidable manual SN 53 4.884 0.69 0.6
--.LRG.Z. 1991-12-15T05:54:27.80 10.0 undecidable manual PN! 303 8.5137 2.76 0
--.PLE.Z. 1991-12-15T05:54:25.40 10.0 undecidable manual SN! 29 4.8285 -2.46 0
--.LMR.Z. 1991-12-15T05:54:22.80 10.0 undecidable manual PN 303 8.3694 -0.17 0.9
--.MDI.Z. 1991-12-15T05:54:21.36 10.0 undecidable manual PN 326 8.1474 1.38 0.3
--.IVA.Z. 1991-12-15T05:54:20.44 10.0 undecidable manual SN! 35 4.6509 -3.09 0
--.CKI.Z. 1991-12-15T05:54:18.00 10.0 undecidable manual PN 314 7.8921 1.65 0.2
--.PVL.Z. 1991-12-15T05:54:18.00 10.0 undecidable manual PN! 56 7.8477 2.15 0
--.SBF.Z. 1991-12-15T05:54:18.70 10.0 undecidable manual PN 308 8.0475 0.12 0.9
--.PVY.Z. 1991-12-15T05:54:16.18 10.0 undecidable manual SN! 38 4.4733 -3.12 0
--.FVI.Z. 1991-12-15T05:54:15.00 10.0 undecidable manual PN 342 7.8366 -0.66 0.7
--.BCI.Z. 1991-12-15T05:54:15.40 10.0 undecidable manual SN 41 4.3623 -1 0.4
--.CTI.Z. 1991-12-15T05:54:12.37 10.0 undecidable manual PN 335 7.6479 -0.69 0.7
--.BOB.Z. 1991-12-15T05:54:11.50 10.0 undecidable manual PN 320 7.5147 0.35 0.9
--.RBL.Z. 1991-12-15T05:54:11.50 10.0 undecidable manual PN 346 7.5258 0.1 1
--.PHP.Z. 1991-12-15T05:54:10.90 10.0 undecidable manual SN 50 4.1181 0.25 0.8
--.RDO.Z. 1991-12-15T05:54:10.50 10.0 undecidable manual PN 71 7.4148 0.65 0.8
--.NKY.Z. 1991-12-15T05:54:10.60 10.0 undecidable manual SN! 29 4.2291 -2.83 0
--.BRY.Z. 1991-12-15T05:54:08.92 10.0 undecidable manual SN! 24 4.1514 -2.54 0
--.OHR.Z. 1991-12-15T05:54:08.40 10.0 undecidable manual SN 59 4.0293 -0.36 0.7
--.KBN.Z. 1991-12-15T05:54:06.50 10.0 undecidable manual SN! 65 3.8184 2.83 0
--.TTG.Z. 1991-12-15T05:54:05.12 10.0 undecidable manual SN! 34 4.0182 -3.29 0
--.VOY.Z. 1991-12-15T05:54:05.00 10.0 undecidable manual PN 347 7.0707 -0.17 1
--.SDA.Z. 1991-12-15T05:54:04.80 10.0 undecidable manual SN 40 3.8073 1.33 0.3
--.LJU.Z. 1991-12-15T05:54:03.60 10.0 undecidable manual PN 350 6.993 -0.41 0.9
--.ZAG.Z. 1991-12-15T05:54:01.50 10.0 undecidable manual PN 359 6.6711 1.87 0.1
--.TRI.Z. 1991-12-15T05:54:01.90 10.0 undecidable manual PN 345 6.7821 -0.13 1
--.PTJ.Z. 1991-12-15T05:54:00.10 10.0 undecidable manual PN 358 6.7488 -0.64 0.8
--.HCY.Z. 1991-12-15T05:53:58.90 10.0 undecidable manual SN! 27 3.7296 -2.63 0
--.BDI.Z. 1991-12-15T05:53:57.00 10.0 undecidable manual PN 321 6.438 0.63 0.8
--.BDV.Z. 1991-12-15T05:53:57.86 10.0 undecidable manual SN! 31 3.7185 -3.34 0
--.PGF.Z. 1991-12-15T05:53:56.10 10.0 undecidable manual PN 304 6.3936 0.3 1
--.ULC.Z. 1991-12-15T05:53:55.90 10.0 undecidable manual SN! 38 3.6519 -3.71 0
--.VBY.Z. 1991-12-15T05:53:55.80 10.0 undecidable manual PN 354 6.3825 0.14 1.1
--.RIY.Z. 1991-12-15T05:53:54.50 10.0 undecidable manual PN 348 6.327 -0.36 1
--.ATH.Z. 1991-12-15T05:53:52.40 10.0 undecidable manual PN 99 6.0051 1.99 0.1
--.VLI.Z. 1991-12-15T05:53:50.00 10.0 undecidable manual PN 112 5.8497 1.64 0.2
--.SFI.Z. 1991-12-15T05:53:48.91 10.0 undecidable manual PN 327 5.7387 2.01 0.1
--.PGD.Z. 1991-12-15T05:53:48.58 10.0 undecidable manual PN 326 5.772 1.26 0.4
--.RSM.Z. 1991-12-15T05:53:46.91 10.0 undecidable manual PN! 331 5.5278 3.04 0
--.CRE.Z. 1991-12-15T05:53:44.20 10.0 undecidable manual PN 326 5.4723 0.88 0.7
--.VAY.Z. 1991-12-15T05:53:41.50 10.0 undecidable manual PN 63 5.328 0.24 2.3
--.MAO.Z. 1991-12-15T05:53:38.10 10.0 undecidable manual PN 312 5.0061 1.28 0.4
--.ARV.Z. 1991-12-15T05:53:37.14 10.0 undecidable manual PN 332 4.9728 0.84 0.8
--.SKO.Z. 1991-12-15T05:53:35.50 10.0 undecidable manual PN 53 4.884 0.38 2.3
--.ASS.Z. 1991-12-15T05:53:34.30 10.0 undecidable manual PN 327 4.7175 1.47 0.3
--.PLE.Z. 1991-12-15T05:53:33.64 10.0 negative manual PN 29 4.8285 -0.61 2
--.FG3.Z. 1991-12-15T05:53:32.66 10.0 undecidable manual SN 356 2.5641 -0.97 0.3
--.KZN.Z. 1991-12-15T05:53:30.50 10.0 undecidable manual PN 73 4.4511 1.41 0.4
--.IVA.Z. 1991-12-15T05:53:30.90 10.0 negative manual PN 35 4.6509 -1.06 1.3
--.KKS.Z. 1991-12-15T05:53:29.00 10.0 negative manual PN 46 4.3401 1.38 0.8
--.PVY.Z. 1991-12-15T05:53:28.38 10.0 negative manual PN 38 4.4733 -1.13 1.2
--.MEU.Z. 1991-12-15T05:53:27.54 10.0 undecidable manual SN 207 2.2866 0.44 0.5
--.BCI.Z. 1991-12-15T05:53:27.90 10.0 negative manual PN 41 4.3623 0.06 2.7
--.MNS.Z. 1991-12-15T05:53:26.68 10.0 undecidable manual PN 322 4.1736 1.38 0.4
--.USI.Z. 1991-12-15T05:53:26.68 10.0 undecidable manual SN! 260 2.3643 -2.24 0
--.NKY.Z. 1991-12-15T05:53:25.46 10.0 negative manual PN 29 4.2291 -0.66 2
--.PZI.Z. 1991-12-15T05:53:25.93 10.0 undecidable manual SN 205 2.2866 -1.4 0.2
--.BRY.Z. 1991-12-15T05:53:24.48 10.0 negative manual PN 24 4.1514 -0.51 2.3
--.OVO.Z. 1991-12-15T05:53:24.20 10.0 undecidable manual SN 321 2.1534 0.18 0.5
--.PHP.Z. 1991-12-15T05:53:24.40 10.0 negative manual PN 50 4.1181 -0.12 2.7
--.OHR.Z. 1991-12-15T05:53:24.70 10.0 undecidable manual PN 59 4.0293 1.27 1
--.TTG.Z. 1991-12-15T05:53:22.80 10.0 negative manual PN 34 4.0182 -1.15 1.2
--.AQU.Z. 1991-12-15T05:53:22.70 10.0 undecidable manual PN! 327 3.8295 2.17 0
--.FG4.Z. 1991-12-15T05:53:21.93 10.0 undecidable manual SN 346 2.0424 0.62 0.4
--.SDA.Z. 1991-12-15T05:53:20.30 10.0 negative manual PN 40 3.8073 -0.07 2.7
--.KBN.Z. 1991-12-15T05:53:20.00 10.0 undecidable manual PN 65 3.8184 -0.49 1.2
--.RMP.Z. 1991-12-15T05:53:20.10 10.0 undecidable manual PN 316 3.7407 0.61 1.1
--.RDP.Z. 1991-12-15T05:53:19.20 10.0 undecidable manual PN 316 3.7074 0.23 1.3
--.CP9.Z. 1991-12-15T05:53:18.37 10.0 negative manual PN 319 3.6519 0.27 2.6
--.BDV.Z. 1991-12-15T05:53:18.12 10.0 negative manual PN 31 3.7185 -0.94 1.5
--.HCY.Z. 1991-12-15T05:53:18.20 10.0 negative manual PN 27 3.7296 -1.06 1.3
--.VLS.Z. 1991-12-15T05:53:17.50 10.0 undecidable manual PN 104 3.5631 0.44 1.2
--.GIO.Z. 1991-12-15T05:53:16.18 10.0 undecidable manual SN 208 1.776 1.11 0.2
--.ULC.Z. 1991-12-15T05:53:16.92 10.0 negative manual PN 38 3.6519 -1.23 1
--.LVI.Z. 1991-12-15T05:53:12.34 10.0 negative manual PN 250 3.2079 0.29 2.5
--.CVT.Z. 1991-12-15T05:53:11.26 10.0 undecidable manual PN 242 3.0192 1.78 0.2
--.SDI.Z. 1991-12-15T05:53:11.19 10.0 undecidable manual PN 325 3.1302 0.3 1.3
--.FAI.Z. 1991-12-15T05:53:08.18 10.0 undecidable manual PN! 227 2.7084 2.97 0
--.DUI.Z. 1991-12-15T05:53:07.42 10.0 undecidable manual PN 333 2.8194 0.63 1
--.KEK.Z. 1991-12-15T05:53:07.50 10.0 undecidable manual PN 77 2.8527 0.38 1.2
--.SGG.Z. 1991-12-15T05:53:04.00 10.0 undecidable manual PN 329 2.6196 0.04 1.3
--.MSC.Z. 1991-12-15T05:53:03.70 10.0 positive manual PN 321 2.6418 -0.57 2.2
--.FG3.Z. 1991-12-15T05:53:02.73 10.0 undecidable manual PN 356 2.5641 -0.42 1.2
--.MS1.Z. 1991-12-15T05:53:00.00 10.0 undecidable manual PN! 356 2.5641 -3.12 0
--.ATN.Z. 1991-12-15T05:52:59.54 10.0 undecidable manual SN 209 1.1211 0 0.5
--.USI.Z. 1991-12-15T05:52:59.30 10.0 negative manual PN 260 2.3643 -1.13 1.2
--.MEU.Z. 1991-12-15T05:52:59.66 10.0 negative manual PN 207 2.2866 0.28 2.6
--.PZI.Z. 1991-12-15T05:52:59.86 10.0 undecidable manual PN 205 2.2866 0.35 1.2
--.OVO.Z. 1991-12-15T05:52:57.90 10.0 undecidable manual PN 321 2.1534 0.3 1.3
--.FG4.Z. 1991-12-15T05:52:56.29 10.0 undecidable manual PN 346 2.0424 0.26 1.3
--.AU9.Z. 1991-12-15T05:52:56.32 10.0 undecidable manual PN 201 2.0313 0.48 1.2
--.GIB.Z. 1991-12-15T05:52:55.65 10.0 negative manual PN 236 2.0313 -0.24 2.6
--.BAI.Z. 1991-12-15T05:52:55.50 10.0 positive manual PN 15 2.0313 -0.33 2.5
--.MSI.Z. 1991-12-15T05:52:55.93 10.0 undecidable manual SN 207 1.0545 -1.85 0.1
--.CDT.Z. 1991-12-15T05:52:54.00 10.0 negative manual PN 2 1.9314 -0.51 2.3
--.SOR.Z. 1991-12-15T05:52:54.40 10.0 positive manual PN 316 2.0091 -1.15 1.2
--.PE1.Z. 1991-12-15T05:52:54.30 10.0 positive manual PN 29 1.9092 0.09 2.7
--.GIO.Z. 1991-12-15T05:52:54.15 10.0 undecidable manual PN 208 1.776 1.72 0.2
--.LCI.Z. 1991-12-15T05:52:54.21 10.0 negative manual PN 50 1.8981 0.13 2.7
--.BRT.Z. 1991-12-15T05:52:53.67 10.0 negative manual PN 23 1.8759 -0.08 2.7
--.MNO.Z. 1991-12-15T05:52:51.19 10.0 undecidable manual PN 224 1.6761 0.27 1.3
--.SGO.Z. 1991-12-15T05:52:47.87 10.0 undecidable manual PN 335 1.554 -1.49 0.3
--.MO9.Z. 1991-12-15T05:52:43.53 10.0 negative manual PN 198 1.1988 -0.91 1.6
--.MSI.Z. 1991-12-15T05:52:42.61 10.0 undecidable manual PN 207 1.0545 0.16 1.3
--.ATN.Z. 1991-12-15T05:52:42.36 10.0 negative manual PN 209 1.1211 -1.11 1.3
--.SOI.Z. 1991-12-15T05:52:42.36 10.0 negative manual PN 185 1.0656 -0.33 2.5
--.MGR.Z. 1991-12-15T05:52:41.18 10.0 positive manual PN 334 1.0989 -1.84 0.3
--.GMB.Z. 1991-12-15T05:52:40.86 10.0 undecidable manual PG 195 1.0101 -0.79 0.9
--.SC9.Z. 1991-12-15T05:52:39.89 10.0 undecidable manual PG 202 0.9546 -0.72 1
--.TDS.Z. 1991-12-15T05:52:33.41 10.0 undecidable manual PG 13 0.5217 0.72 1
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download