Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 5.0 on date 20-05-2012 and time 04:07:28 (Italy) in region 5 km NW Finale Emilia (MO)

A magnitude ML 5.0 earthquake occured in region: 5 km NW Finale Emilia (MO), on

  • 20-05-2012 02:07:28 (UTC)
  • 20-05-2012 04:07:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.8740, 11.2700 at 6 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
Finale Emilia MO 5 15699 15699
San Felice sul Panaro MO 11 10900 26599
Bondeno FE 12 14655 41254
Sant'Agostino FE 13 6853 48107
Felonica MN 14 1359 49466
Camposanto MO 14 3201 52667
Calto RO 15 743 53410
Sermide MN 15 6189 59599
Ficarolo RO 16 2438 62037
Medolla MO 16 6308 68345
Mirabello FE 16 3266 71611
Magnacavallo MN 16 1561 73172
Mirandola MO 16 23875 97047
Cento FE 16 35686 132733
Castelmassa RO 16 4252 136985
Poggio Rusco MN 17 6625 143610
Castelnovo Bariano RO 17 2762 146372
Ceneselli RO 18 1719 148091
Salara RO 18 1160 149251
Pieve di Cento BO 18 7019 156270
San Giovanni del Dosso MN 18 1248 157518
Carbonara di Po MN 18 1297 158815
Vigarano Mainarda FE 19 7694 166509
Villa Poma MN 19 2023 168532
Gaiba RO 19 1063 169595
Crevalcore BO 19 13465 183060
Cavezzo MO 19 7026 190086
Galliera BO 19 5439 195525

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km W of Ferrara (133155 inhabitants)
32 Km E of Carpi (70699 inhabitants)
37 Km NE of Modena (184973 inhabitants)
43 Km N of Bologna (386663 inhabitants)
47 Km W of Rovigo (51867 inhabitants)
54 Km E of Reggio nell'Emilia (171345 inhabitants)
67 Km SE of Verona (258765 inhabitants)
68 Km NW of Imola (69797 inhabitants)
75 Km E of Parma (192836 inhabitants)
76 Km SW of Padova (210401 inhabitants)
78 Km S of Vicenza (112953 inhabitants)
81 Km NW of Faenza (58541 inhabitants)
89 Km NW of Ravenna (159116 inhabitants)
95 Km NW of Forlì (117913 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

These three maps show the results of the analysis using the software ShakeMap designed to provide the level of ground shaking experienced in a region using the data recorded by seismometers and strong motion instruments and seismological information regarding the attenuation of the wavefield with distance and the site characteristics. The Shakemaps are determined for research purposes to provide fast estimates of the level of ground shaking produced by the earthquake. The maps are calculated automatically and updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent of the acceleration of gravity (i.e., g = 9.81 m/s²).
Peak velocity Shakemap

Peak velocity Shakemap

This map shows the distribution of peak ground velocities expressed in cm/s.
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 5.1 2012-05-20
02:07:31		 44.8627 11.3702 5 2014-10-21
12:19:34		 Sala Sismica INGV-Roma 1370641
Bulletin
Rev1000 		ML 5.0 2012-05-20
02:07:28		 44.8737 11.2703 6 2014-09-19
08:14:18		 Bollettino Sismico Italiano INGV 4851541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-05-20 02:07:28 ± 0.29
Latitude 44.8737 ± 0.0054
Longitude 11.2703 ± 0.0102
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 4851541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 726
Semi-minor axis of confidence ellipse (meter) 554
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 125
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.15918
Epicentral distance of station farthest from the epicenter (degree) 1.29412
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:5.0

Field Value
Value 5.0
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 4851541
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2014-09-18 12:47:04

ML:5.1

Field Value
Value 5.1
Uncertainty 0.3
Num. used stations 0
Type of magnitude ML
Reference to an origin 1370641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2012-05-23 17:37:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MABI.HHZ. 2012-05-20T02:07:56.49 0.6 undecidable manual P 336 143.6451 38 0.25 50
IV.CTI.HHZ. 2012-05-20T02:07:54.06 0.6 undecidable manual P 13 133.5663 38 -0.62 46
IV.CRMI.HHZ. 2012-05-20T02:07:53.03 0.6 undecidable manual P 191 121.7892 38 0.18 53
IV.ASOL.HNZ. 2012-05-20T02:07:51.46 0.6 undecidable manual P 25 113.997 38 -0.18 54
IV.MAGA.HHZ. 2012-05-20T02:07:51.58 0.3 undecidable manual P 334 111.7992 38 0.28 79
IV.VOBA.HNZ. 2012-05-20T02:07:50.80 0.3 undecidable manual P 325 104.2179 38 0.68 72
IV.SALO.HHZ. 2012-05-20T02:07:50.79 0.6 undecidable manual P 325 101.121 38 1.16 39
IV.BDI.HNZ. 2012-05-20T02:07:50.86 0.6 undecidable manual P 211 104.6175 38 0.68 48
IV.PTF.SHZ. 2012-05-20T02:07:49.28 0.6 undecidable manual P 189 102.5196 38 -0.58 50
IV.NOVE.EHZ. 2012-05-20T02:07:49.73 0.3 undecidable manual S 259 44.4222 50 -0.93 72
IV.SEI.SHZ. 2012-05-20T02:07:48.53 1.0 undecidable manual P 176 91.1421 38 0.44 27
IV.BRIS.HHE. 2012-05-20T02:07:47.15 0.3 undecidable manual P 151 81.9513 38 0.48 81
IV.ROVR.HHE. 2012-05-20T02:07:47.65 0.3 undecidable manual P 350 87.1461 38 0.18 85
IV.SANR.HNZ. 2012-05-20T02:07:47.46 0.6 undecidable manual P 17 89.0442 38 -0.3 55
IV.MODE.HNZ. 2012-05-20T02:07:46.86 0.6 undecidable manual S 223 37.0296 50 -0.57 57
IV.FNVD.HHZ. 2012-05-20T02:07:46.68 0.6 undecidable manual P 189 79.1652 38 0.45 54
IV.SBPO.HHE. 2012-05-20T02:07:46.96 0.6 undecidable manual S 306 33.8439 50 0.94 49
IV.TREG.HNZ. 2012-05-20T02:07:45.38 0.6 undecidable manual P 353 72.5718 38 0.18 58
IV.MTRZ.HHE. 2012-05-20T02:07:44.43 0.6 undecidable manual P 169 63.3921 38 0.65 52
IV.IMOL.EHE. 2012-05-20T02:07:44.47 0.3 undecidable manual P 147 68.1762 38 -0.04 91
IV.ZOVE.HNZ. 2012-05-20T02:07:43.52 0.6 undecidable manual P 15 66.5778 38 -0.75 50
IV.ZCCA.HNZ. 2012-05-20T02:07:43.90 0.3 undecidable manual P 202 62.493 38 0.27 88
IV.MNTV.HNZ. 2012-05-20T02:07:42.28 0.3 undecidable manual P 309 48.5181 50 -0.12 93
IV.TEOL.HHZ. 2012-05-20T02:07:42.72 0.3 undecidable manual P 30 62.6928 38 -0.95 69
IV.OPPE.HNZ. 2012-05-20T02:07:41.62 0.3 undecidable manual P 351 48.8178 50 -0.85 74
IV.NOVE.EHZ. 2012-05-20T02:07:40.78 0.3 undecidable manual P 259 44.4222 50 -0.58 84
IV.MODE.HNZ. 2012-05-20T02:07:39.51 0.3 undecidable manual P 223 37.0296 50 -0.01 97
IV.SBPO.HHE. 2012-05-20T02:07:39.94 0.6 undecidable manual P 306 33.8439 50 1.23 42
IV.RAVA.EHZ. 2012-05-20T02:07:39.90 0.3 undecidable manual S 222 17.6712 109 0.02 100
IV.FIU.EHZ. 2012-05-20T02:07:37.74 0.3 undecidable manual P 146 31.2465 50 -0.31 92
IV.RAVA.EHZ. 2012-05-20T02:07:35.34 0.3 undecidable manual P 222 17.6712 109 0.14 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASOL.HNN. ML:5.1 0.09465000000000001 0.7 AML other m 2012-05-20T02:08:14.16
IV.ASOL.HNE. ML:5.0 0.08319999999999998 0.66 AML other m 2012-05-20T02:08:14.09
IV.BDI.HHN. ML:4.5 0.03015 0.72 AML other m 2012-05-20T02:08:11.50
IV.BDI.HNN. ML:4.5 0.02655 0.68 AML other m 2012-05-20T02:08:11.49
IV.BDI.HHE. ML:4.6 0.0335 0.86 AML other m 2012-05-20T02:08:21.14
IV.BDI.HNE. ML:4.6 0.0359 0.8 AML other m 2012-05-20T02:08:21.59
IV.CNCS.HNE. ML:5.4 0.2185 0.92 AML other m 2012-05-20T02:08:10.20
IV.CNCS.HNN. ML:5.5 0.2455 0.32 AML other m 2012-05-20T02:08:11.62
IV.CTI.HHN. ML:5.0 0.05775 0.44 AML other m 2012-05-20T02:08:12.72
IV.CTI.HHE. ML:4.9 0.052399999999999995 0.78 AML other m 2012-05-20T02:08:12.42
IV.MABI.HHE. ML:4.8 0.032049999999999995 0.64 AML other m 2012-05-20T02:08:15.54
IV.MABI.HHN. ML:4.7 0.027399999999999997 0.82 AML other m 2012-05-20T02:08:16.15
IV.MERA.HNN. ML:5.3 0.07855000000000001 0.38 AML other m 2012-05-20T02:08:25.08
IV.MERA.HNE. ML:5.4 0.09025 0.56 AML other m 2012-05-20T02:08:25.35
IV.MNTV.HNN. ML:5.0 0.2875 1.58 AML other m 2012-05-20T02:07:49.61
IV.MNTV.HNE. ML:4.9 0.2235 1.14 AML other m 2012-05-20T02:07:57.26
IV.MODE.HNE. ML:5.3 0.8315 0.8 AML other m 2012-05-20T02:08:00.13
IV.MODE.HNN. ML:5.3 0.811 0.82 AML other m 2012-05-20T02:08:00.15
IV.OPPE.HNN. ML:5.3 0.5695 0.56 AML other m 2012-05-20T02:07:50.30
IV.OPPE.HNE. ML:5.2 0.416 0.56 AML other m 2012-05-20T02:07:50.00
IV.PLMA.HHE. ML:4.5 0.0171 0.68 AML other m 2012-05-20T02:08:19.23
IV.PLMA.HHN. ML:4.5 0.01795 1.12 AML other m 2012-05-20T02:08:19.26
IV.SALO.HHN. ML:5.3 0.185 0.78 AML other m 2012-05-20T02:08:06.74
IV.SALO.HHE. ML:5.3 0.203 0.76 AML other m 2012-05-20T02:08:07.27
IV.SANR.HNE. ML:4.8 0.072 1.04 AML other m 2012-05-20T02:08:03.99
IV.SANR.HNN. ML:5.0 0.1145 1.16 AML other m 2012-05-20T02:08:05.25
IV.TEOL.HHE. ML:5.0 0.1835 0.88 AML other m 2012-05-20T02:07:54.97
IV.TEOL.HHN. ML:4.8 0.123 0.98 AML other m 2012-05-20T02:07:53.67
IV.TREG.HNE. ML:4.8 0.09409999999999999 0.42 AML other m 2012-05-20T02:07:55.51
IV.TREG.HNN. ML:5.1 0.217 0.52 AML other m 2012-05-20T02:07:59.41
IV.VOBA.HNN. ML:5.2 0.133 0.9 AML other m 2012-05-20T02:08:07.34
IV.VOBA.HNE. ML:5.2 0.131 0.88 AML other m 2012-05-20T02:08:07.35
IV.ZOVE.HNN. ML:4.5 0.052 0.82 AML other m 2012-05-20T02:07:55.44
IV.ZOVE.HNE. ML:4.4 0.047700000000000006 0.48 AML other m 2012-05-20T02:07:56.82
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
Waveforms Seismic signals in miniseed + resp format Download