Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mw 5.2 on date 14-09-2003 and time 23:42:53 (Italy) in region 5 km E Loiano (BO)

A magnitude Mw 5.2 earthquake occured in region: 5 km E Loiano (BO), on

  • 14-09-2003 21:42:53 (UTC)
  • 14-09-2003 23:42:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2550, 11.3800 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Loiano BO 5 4294 4294
Monghidoro BO 6 3749 8043
Monterenzio BO 8 6035 14078
Monzuno BO 9 6328 20406
Castel del Rio BO 11 1246 21652
San Benedetto Val di Sambro BO 12 4315 25967
Fontanelice BO 14 1943 27910
Pianoro BO 15 17460 45370
Firenzuola FI 15 4726 50096
Marzabotto BO 17 6779 56875
Borgo Tossignano BO 17 3288 60163
Grizzana Morandi BO 18 3916 64079
Sasso Marconi BO 19 14735 78814
Casalfiumanese BO 20 3438 82252
Casola Valsenio RA 20 2617 84869

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km S of Bologna (386663 inhabitants)
29 Km W of Imola (69797 inhabitants)
40 Km W of Faenza (58541 inhabitants)
47 Km NE of Prato (191150 inhabitants)
51 Km NE of Pistoia (90315 inhabitants)
53 Km W of Forlì (117913 inhabitants)
55 Km N of Firenze (382808 inhabitants)
57 Km SE of Modena (184973 inhabitants)
57 Km N of Scandicci (50609 inhabitants)
67 Km S of Ferrara (133155 inhabitants)
68 Km W of Ravenna (159116 inhabitants)
70 Km W of Cesena (96758 inhabitants)
71 Km SE of Carpi (70699 inhabitants)
77 Km SE of Reggio nell'Emilia (171345 inhabitants)
84 Km NE of Lucca (89046 inhabitants)
96 Km NW of Arezzo (99543 inhabitants)
97 Km SW of Rovigo (51867 inhabitants)
97 Km W of Rimini (147750 inhabitants)
99 Km NE of Pisa (89158 inhabitants)
100 Km E of Viareggio (62467 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
Reviewed Evaluation Mw
Rev501 		Mw 5.2 2003-09-14
21:42:53		 44.255 11.38 31 2023-05-19
11:41:43		 TDMT-INGV Revised 117488511
Bulletin
Rev1000 		Md 5.0
MLNET 5.0 		2003-09-14
21:42:53		 44.255 11.38 8 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 484269
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2003-09-14 21:42:53 ± 0.349
Latitude 44.2550 ± 0.0106
Longitude 11.3800 ± 0.0143
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 484269

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) 1640.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 38
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 53
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) 0.00178
Epicentral distance of station farthest from the epicenter (degree) 0.05699
Number of stations at which the event was observed 51
Number of stations from which data was used for origin computation 51
Magnitudes information

Mw:5.2

Field Value
Value 5.2
Uncertainty
Num. used stations
Type of magnitude Mw
Reference to an origin 117488511
Agency INGV
Autore TDMT-INGV Revised
Time of creation (UTC) 2023-05-19 11:41:43

Md:5.0

Field Value
Value 5.0
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 484269
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 00:41:42

ML:5.0

Field Value
Value 5.0
Uncertainty
Num. used stations
Type of magnitude ML
Reference to an origin 484269
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 10:37:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.LCI.Z. 2003-09-14T21:44:26.45 10.0 undecidable manual PN 125 6.327 0.01 0
--.ORI.Z. 2003-09-14T21:44:18.71 10.0 undecidable manual PN 136 5.6277 1.88 0
--.BRT.Z. 2003-09-14T21:44:14.30 10.0 undecidable manual PN 126 5.4168 0.05 0
--.MGR.Z. 2003-09-14T21:44:11.95 10.0 undecidable manual PN 141 5.1393 1.8 0
--.MRLC.Z. 2003-09-14T21:44:04.70 10.0 undecidable manual PN 137 4.6176 1.09 0
--.CSSN.Z. 2003-09-14T21:44:00.39 10.0 undecidable manual PN 140 4.3179 1.53 0
--.FG4.Z. 2003-09-14T21:43:59.93 10.0 undecidable manual PN 134 4.3512 0.63 0
--.FG5.Z. 2003-09-14T21:43:57.37 10.0 undecidable manual PN 134 4.107 1.34 0
--.FGMS.Z. 2003-09-14T21:43:56.90 10.0 undecidable manual PN 125 4.1958 -0.28 0
--.RGNG.Z. 2003-09-14T21:43:54.38 10.0 undecidable manual PN 128 4.0071 -0.22 0
--.MSC.Z. 2003-09-14T21:43:50.36 10.0 undecidable manual PN 147 3.5964 1.38 0
--.RFI.Z. 2003-09-14T21:43:49.69 10.0 undecidable manual PN 146 3.5187 1.91 0
--.BNI.Z. 2003-09-14T21:43:47.57 10.0 undecidable manual PN 285 3.4188 0.91 0
--.CRVI.Z. 2003-09-14T21:43:46.63 10.0 undecidable manual PN 138 3.3078 1.66 0
--.DOI.Z. 2003-09-14T21:43:40.84 10.0 undecidable manual PN 276 2.9526 0.67 0
--.MCGN.Z. 2003-09-14T21:43:38.41 10.0 undecidable manual PN 306 2.9304 -1.39 0
--.PTQR.Z. 2003-09-14T21:43:37.26 10.0 undecidable manual PN 145 2.664 1.05 0
--.MA9.Z. 2003-09-14T21:43:37.30 10.0 undecidable manual PN 158 2.6529 1.11 0
--.CERT.Z. 2003-09-14T21:43:35.27 10.0 undecidable manual PN 152 2.5752 0.3 0.1
--.IMI.Z. 2003-09-14T21:43:34.90 10.0 undecidable manual PN 263 2.5197 -0.09 0.2
--.FVI.Z. 2003-09-14T21:43:33.36 10.0 undecidable manual PN 22 2.5197 -0.94 0.2
--.AQU.Z. 2003-09-14T21:43:33.86 10.0 undecidable manual PN 141 2.3976 1.38 0.3
--.PTCC.Z. 2003-09-14T21:43:32.98 10.0 undecidable manual PN 32 2.553 -1.63 0.2
--.VAI.Z. 2003-09-14T21:43:32.65 10.0 undecidable manual PN 312 2.442 -0.43 0.3
--.BRMO.Z. 2003-09-14T21:43:31.53 10.0 undecidable manual PN 342 2.331 0.06 0.5
--.GMNA.Z. 2003-09-14T21:43:30.56 10.0 undecidable manual PN 30 2.3643 -1.48 0.4
--.FIN.Z. 2003-09-14T21:43:30.78 10.0 undecidable manual PN 269 2.2644 0.11 0.5
--.TRI.Z. 2003-09-14T21:43:28.14 10.0 undecidable manual PN 48 2.22 -1.9 0.6
--.MNS.Z. 2003-09-14T21:43:27.97 10.0 undecidable manual PN 152 2.0868 -0.28 0.7
--.CTI.Z. 2003-09-14T21:43:22.88 10.0 undecidable manual PN 5 1.7982 -1.34 1.1
--.BOB.Z. 2003-09-14T21:43:21.80 10.0 undecidable manual PN 291 1.4652 2.14 1.5
--.CSNT.N. 2003-09-14T21:43:21.70 10.0 undecidable manual SG 184 0.777 0.46 2.2
--.SNTG.Z. 2003-09-14T21:43:21.90 10.0 undecidable manual PN 131 1.4985 0.92 1.5
--.ASS.Z. 2003-09-14T21:43:19.50 10.0 undecidable manual PN 141 1.4985 -0.66 1.5
--.ARV.Z. 2003-09-14T21:43:18.14 10.0 undecidable manual PN 123 1.3431 0.02 1.6
--.FSSB.Z. 2003-09-14T21:43:15.91 10.0 undecidable manual PN 118 1.1544 0.6 1.9
--.PESA.Z. 2003-09-14T21:43:15.50 10.0 undecidable manual PN 106 1.0878 0.53 2
--.GRFL.Z. 2003-09-14T21:43:13.83 10.0 undecidable manual PN 194 1.1433 -1.38 1.9
--.SFI.N. 2003-09-14T21:43:11.10 10.0 undecidable manual SG 136 0.4884 0.1 2.2
--.RSM.Z. 2003-09-14T21:43:10.75 10.0 undecidable manual PG 112 0.8214 0.8 2.2
--.PII.Z. 2003-09-14T21:43:09.14 10.0 undecidable manual PG 229 0.8103 -0.42 2.2
--.CSNT.Z. 2003-09-14T21:43:08.80 10.0 negative manual PG 184 0.777 -0.22 2.2
--.ERBM.Z. 2003-09-14T21:43:08.66 10.0 undecidable manual PG 283 0.6993 1.02 2.2
--.CRE.Z. 2003-09-14T21:43:07.75 10.0 undecidable manual PG 146 0.7548 -0.73 2.2
--.GSCL.Z. 2003-09-14T21:43:04.58 10.0 undecidable manual PG 279 0.5661 -0.54 2.2
--.BDI.Z. 2003-09-14T21:43:04.80 10.0 undecidable manual PG 251 0.5883 -0.67 2.2
--.BRSN.Z. 2003-09-14T21:43:04.52 10.0 positive manual PG 86 0.4995 0.82 2.2
--.SFI.Z. 2003-09-14T21:43:03.20 10.0 undecidable manual PG 136 0.4884 -0.45 2.2
--.PGD.Z. 2003-09-14T21:43:02.57 10.0 negative manual PG 146 0.444 -0.27 2.2
--.FIU.Z. 2003-09-14T21:43:01.66 10.0 undecidable manual PG 11 0.3885 -0.09 2.2
--.ZCCA.Z. 2003-09-14T21:43:00.59 10.0 undecidable manual PG 288 0.2997 0.5 2.2
--.VMG.Z. 2003-09-14T21:43:00.10 10.0 undecidable manual PG 158 0.3108 -0.23 2.2
--.SEI.Z. 2003-09-14T21:42:58.32 10.0 positive manual PG 184 0.1998 0.37 2.2
TDMT - Time Domain Moment Tensor

TDMT details

Field Value
Magnitude5.2
Scalar Moment8.29069E+23 dyne-cm
Computed depth31 km
QualityAa
Variance Reduction64.79%
Double Couple96%
CLVD4%
ISO0%
Model usedCIA
Modemanual
Statusreviewed

Moment Tensor Components

Component Value
Mrr7.463169E+23
Mtt-7.149377E+23
Mpp-3.13792E+22
Mrt1.332808E+23
Mrp-1.939978E+23
Mtp-3.124913E+23

Nodal Planes

Name Strike Dip Rake
PN18550113
PN22324665

Fault Plane solution

Focal Mechanism

psmeca (GMT documentation)

11.38 44.255 31 85 50 113 232 46 65 8.29069 23 11.88 44.755

TDMT references

More info and references

PDF Solution

Download TDMT soution in PDF format
Download TDMT soution in PDF format

Station Distribution

Station Distribution

TDMT station details

Sta Dist Azi V R zcor
ISA 168.3 4.6 67.26% 113
IBA 172.1 8.8 65.06% 114
ICA 183.1 12.5 72.54% 115
IQO 164.5 22.1 56.78% 112
ISZ 161.3 341.3 51.97% 113
IPA 161.7 354.4 58.87% 114
AQU 267.6 141.4 79.46% 124
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