Earthquake with magnitude of Md 3.4 on date 20-12-2003 and time 03:29:40 (UTC) in region 4 km E Marmora (CN)

A magnitude Md 3.4 earthquake occured in region: 4 km E Marmora (CN), on

  • 20-12-2003 03:29:40 (UTC)
  • 20-12-2003 04:29:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.4620, 7.1410 at 10 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
Marmora CN 4 68 68
Celle di Macra CN 4 100 168
Canosio CN 5 80 248
Stroppo CN 5 103 351
Macra CN 5 59 410
Prazzo CN 7 170 580
Castelmagno CN 8 66 646
Elva CN 10 97 743
San Damiano Macra CN 10 430 1173
Cartignano CN 12 190 1363
Acceglio CN 12 162 1525
Pradleves CN 12 250 1775
Sampeyre CN 14 1022 2797
Sambuco CN 15 92 2889
Casteldelfino CN 16 157 3046
Pietraporzio CN 16 77 3123
Monterosso Grana CN 16 505 3628
Roccabruna CN 16 1585 5213
Argentera CN 16 83 5296
Frassino CN 16 265 5561
Bellino CN 17 109 5670
Vinadio CN 17 644 6314
Aisone CN 18 248 6562
Dronero CN 18 7035 13597
Melle CN 18 292 13889
Montemale di Cuneo CN 19 241 14130
Valmala CN 19 52 14182
Villar San Costanzo CN 19 1547 15729
Valgrana CN 20 786 16515
Pontechianale CN 20 179 16694

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km W of Cuneo (56081 inhabitants)
74 Km SW of Moncalieri (57294 inhabitants)
80 Km SW of Torino (890529 inhabitants)
88 Km NW of Sanremo (54807 inhabitants)
97 Km W of Asti (76202 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 3.4
ML-VAX 2.8
2003-12-20
03:29:40
44.462 7.141 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 490739
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2003-12-20 03:29:40 ± 1.118
Latitude 44.4620 ± 0.0320
Longitude 7.1410 ± 0.1025
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 490739

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) 8878.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 246
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00073
Epicentral distance of station farthest from the epicenter (degree) 0.04031
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitudes information

Md:3.4

Field Value
Value 3.4
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 490739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 00:48:20

ML:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 16
Type of magnitude ML
Reference to an origin 490739
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
--.FVI.Z. 2003-12-20T03:30:49.98 10.0 undecidable manual PN 59 4.4733 1.39 0.5
--.SNTG.Z. 2003-12-20T03:30:47.50 10.0 undecidable manual PN 104 4.3401 0.34 1.1
--.ARV.Z. 2003-12-20T03:30:46.59 10.0 undecidable manual PN 101 4.2735 0.8 0.9
--.FSSB.Z. 2003-12-20T03:30:45.00 10.0 undecidable manual PN 98 4.107 1.45 0.5
--.ASS.Z. 2003-12-20T03:30:45.73 10.0 undecidable manual PN 107 4.2069 0.84 0.9
--.CRE.Z. 2003-12-20T03:30:36.30 10.0 undecidable manual PN 102 3.552 0.21 1.3
--.CTI.Z. 2003-12-20T03:30:34.72 10.0 undecidable manual PN 61 3.5409 -0.97 0.9
--.SFI.Z. 2003-12-20T03:30:33.74 10.0 undecidable manual PN 97 3.4188 -0.2 1.3
--.VAI.Z. 2003-12-20T03:30:33.97 10.0 undecidable manual SN 38 1.8093 -0.6 0.6
--.PGD.Z. 2003-12-20T03:30:33.50 10.0 undecidable manual PN 98 3.33 0.26 1.3
--.BOB.Z. 2003-12-20T03:30:32.72 10.0 undecidable manual SN 78 1.665 1.59 0.2
--.CSNT.Z. 2003-12-20T03:30:29.91 10.0 undecidable manual PN 106 3.1413 -0.27 1.4
--.SEI.Z. 2003-12-20T03:30:29.95 10.0 undecidable manual PN 96 3.0414 1.13 0.8
--.BRMO.Z. 2003-12-20T03:30:29.90 10.0 undecidable manual PN 47 3.0192 0.48 1.3
--.GSCL.Z. 2003-12-20T03:30:21.56 10.0 undecidable manual PN 91 2.4531 0.74 1.3
--.BDI.Z. 2003-12-20T03:30:21.28 10.0 undecidable manual PN 98 2.4975 -0.12 1.6
--.PII.Z. 2003-12-20T03:30:21.26 10.0 undecidable manual PN 105 2.5308 -0.6 1.3
--.ERBM.Z. 2003-12-20T03:30:20.24 10.0 undecidable manual PN 89 2.331 1.18 0.9
--.BOB.Z. 2003-12-20T03:30:11.19 10.0 undecidable manual PN 78 1.665 1.27 0.8
--.VAI.Z. 2003-12-20T03:30:10.56 10.0 undecidable manual PN 38 1.8093 -1.35 0.8
--.MCGN.Z. 2003-12-20T03:30:07.21 10.0 undecidable manual PN 21 1.5984 -1.89 0.4
--.FIN.Z. 2003-12-20T03:30:07.28 10.0 undecidable manual SG 108 0.7992 -1.41 0.3
--.IMI.Z. 2003-12-20T03:30:05.84 10.0 undecidable manual SG 135 0.7659 -1.78 0.1
--.ORO.Z. 2003-12-20T03:30:02.26 10.0 undecidable manual PN 26 1.2987 -2.7 0.1
--.IMI.Z. 2003-12-20T03:29:55.54 10.0 positive manual PG 135 0.7659 -0.81 2.4
--.FIN.Z. 2003-12-20T03:29:55.87 10.0 positive manual PG 108 0.7992 -1.1 1.9
--.DOI.Z. 2003-12-20T03:29:45.57 10.0 undecidable manual SG 60 0.0777 -0.15 0.6
--.DOI.Z. 2003-12-20T03:29:44.20 10.0 negative manual PG 60 0.0777 0.49 2.9
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