Earthquake with magnitude of ML 4.1 on date 21-05-2012 and time 16:37:31 (UTC) in region 4 km N Finale Emilia (MO)

A magnitude ML 4.1 earthquake occured in region: 4 km N Finale Emilia (MO), on

  • 21-05-2012 16:37:31 (UTC)
  • 21-05-2012 18:37:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.8660, 11.3060 at 4 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV integrato con i dati della Rete Sismica di emergenza.

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
Finale Emilia MO 4 15699 15699
Bondeno FE 9 14655 30354
Sant'Agostino FE 10 6853 37207
Mirabello FE 13 3266 40473
San Felice sul Panaro MO 13 10900 51373
Felonica MN 14 1359 52732
Ficarolo RO 14 2438 55170
Calto RO 15 743 55913
Cento FE 15 35686 91599
Camposanto MO 16 3201 94800
Vigarano Mainarda FE 16 7694 102494
Sermide MN 16 6189 108683
Salara RO 16 1160 109843
Pieve di Cento BO 17 7019 116862
Gaiba RO 17 1063 117925
Galliera BO 17 5439 123364
Castelmassa RO 17 4252 127616
Ceneselli RO 17 1719 129335
Castelnovo Bariano RO 18 2762 132097
Poggio Renatico FE 18 9852 141949
Magnacavallo MN 18 1561 143510
Medolla MO 19 6308 149818
Mirandola MO 19 23875 173693
Poggio Rusco MN 19 6625 180318
San Pietro in Casale BO 20 12202 192520
Carbonara di Po MN 20 1297 193817

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km W of Ferrara (133155 inhabitants)
34 Km E of Carpi (70699 inhabitants)
39 Km NE of Modena (184973 inhabitants)
41 Km N of Bologna (386663 inhabitants)
45 Km SW of Rovigo (51867 inhabitants)
56 Km E of Reggio nell'Emilia (171345 inhabitants)
66 Km NW of Imola (69797 inhabitants)
68 Km SE of Verona (258765 inhabitants)
75 Km SW of Padova (210401 inhabitants)
77 Km E of Parma (192836 inhabitants)
78 Km S of Vicenza (112953 inhabitants)
79 Km NW of Faenza (58541 inhabitants)
87 Km NW of Ravenna (159116 inhabitants)
92 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, 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 ( 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.

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 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,
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
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
ML 4.1 2012-05-21
44.8657 11.3055 4 2014-09-19
Bollettino Sismico Italiano INGV integrato con i dati della Rete Sismica di emergenza 5891501
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2012-05-21 16:37:31 ± 0.04
Latitude 44.8657 ± 0.0018
Longitude 11.3055 ± 0.0013
Depth (km) 4 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> REMO-INGV
Event type earthquake
Origin ID 5891501


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 336
Semi-minor axis of confidence ellipse (meter) 243
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 68
Circular confidence region, given by single value of horizontal uncertainty (meter) 200.0
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4113
Epicentral distance of station closest to the epicenter (degree) 0.04317
Epicentral distance of station farthest from the epicenter (degree) 1.07379
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 30
Magnitude information


Field Value
Value 4.1
Uncertainty 0.1
Num. used stations 25
Type of magnitude ML
Reference to an origin 5891501
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2014-09-18 12:47:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
NI.CGRP.HHZ. 2012-05-21T16:38:08.18 0.3 undecidable manual S 19 119.1918 0.23 1.16
IV.MAGA.HHZ. 2012-05-21T16:38:07.29 0.3 undecidable manual S 333 113.997 0.48 0.64
GU.POPM.HHZ. 2012-05-21T16:38:06.95 1.0 undecidable manual S 205 105.0171 -0.46 3.22
IV.ERBM.EHZ. 2012-05-21T16:38:01.11 1.0 undecidable manual S 235 86.3469 2.92 1.03
IV.PRMA.HHZ. 2012-05-21T16:37:59.73 0.6 undecidable manual S 262 79.1652 1.67 0.41
NI.CGRP.HHZ. 2012-05-21T16:37:52.14 0.1 negative manual P 19 119.1918 0.34 0.34
IV.TEOL.HHZ. 2012-05-21T16:37:51.91 1.0 undecidable manual S 28 62.1933 -1.67 0.65
IV.FIU.EHZ. 2012-05-21T16:37:50.22 0.6 undecidable manual S 149 29.0487 7.01 0.32
IV.MAGA.HHZ. 2012-05-21T16:37:50.95 0.3 undecidable manual P 333 113.997 0.08 0.5
MN.VLC.HHZ. 2012-05-21T16:37:50.92 0.3 undecidable manual P 223 107.0151 0.38 0.72
IV.NOVE.EHZ. 2012-05-21T16:37:49.79 0.6 undecidable manual S 261 47.1195 0.01 0.32
IV.BDI.HHZ. 2012-05-21T16:37:49.53 0.6 undecidable manual P 213 105.4167 -0.55 1.23
IV.SALO.HHZ. 2012-05-21T16:37:49.60 0.3 negative manual P 324 103.5186 -0.19 0.28
IV.SEI.SHZ. 2012-05-21T16:37:49.24 0.6 undecidable manual P 177 90.0432 1.36 0.51
GU.POPM.HHZ. 2012-05-21T16:37:49.10 0.6 undecidable manual P 205 105.0171 -0.94 1.25
IV.ROVR.HHZ. 2012-05-21T16:37:47.13 0.1 negative manual P 348 88.5447 0.04 0.07
IV.ERBM.EHZ. 2012-05-21T16:37:47.97 0.3 undecidable manual P 235 86.3469 0.15 0.21
IV.PRMA.HHZ. 2012-05-21T16:37:47.15 0.3 positive manual P 262 79.1652 0.93 0.17
IV.BRIS.HHZ. 2012-05-21T16:37:45.95 0.3 undecidable manual P 153 79.9644 0.14 0.2
IV.FNVD.HHZ. 2012-05-21T16:37:45.39 0.6 undecidable manual P 191 78.7656 -0.3 0.36
IV.ZCCA.HHZ. 2012-05-21T16:37:43.79 0.1 negative manual P 205 62.7927 -0.16 0.05
IV.MTRZ.HHZ. 2012-05-21T16:37:43.85 0.1 negative manual P 171 61.9935 0.06 0.05
IV.T0814.EHZ. 2012-05-21T16:37:42.78 0.6 undecidable manual S 253 27.75 -0.58 0.32
IV.TEOL.HHZ. 2012-05-21T16:37:42.99 0.3 negative manual P 28 62.1933 -0.09 0.14
IV.RAVA.EHZ. 2012-05-21T16:37:40.51 0.1 undecidable manual S 231 19.1697 -0.03 0.06
IV.NOVE.EHZ. 2012-05-21T16:37:40.58 1.0 undecidable manual P 261 47.1195 -0.13 0.5
IV.T0818.EHZ. 2012-05-21T16:37:40.32 1.0 undecidable manual S 290 23.0547 -1.58 0.65
IV.SBPO.HHZ. 2012-05-21T16:37:39.16 1.0 undecidable manual P 304 36.741 -0.13 0.5
IV.MODE.HNZ. 2012-05-21T16:37:39.79 1.0 undecidable manual P 227 38.4282 0.19 0.5
IV.T0812.EHZ. 2012-05-21T16:37:38.48 0.6 undecidable manual S 315 13.9749 -0.25 0.32
IV.FIU.EHZ. 2012-05-21T16:37:37.05 0.1 negative manual P 149 29.0487 -0.29 0.05
IV.T0814.EHZ. 2012-05-21T16:37:37.35 0.3 negative manual P 253 27.75 -0.02 0.13
IV.T0819.EHZ. 2012-05-21T16:37:37.69 0.6 undecidable manual P 274 32.1456 -0.09 0.25
IV.T0811.EHZ. 2012-05-21T16:37:37.26 0.3 undecidable manual S 215 10.9779 -0.03 0.17
IV.T0818.EHZ. 2012-05-21T16:37:36.56 0.1 negative manual P 290 23.0547 0.01 0.05
IV.T0813.EHZ. 2012-05-21T16:37:36.69 0.3 undecidable manual S 279 8.4804 0.17 0.17
IV.T0820.EHZ. 2012-05-21T16:37:36.13 0.6 undecidable manual P 111 22.6551 -0.21 0.25
IV.T0816.EHZ. 2012-05-21T16:37:36.52 0.3 negative manual P 125 28.1496 -0.39 0.13
IV.T0822.EHZ. 2012-05-21T16:37:35.60 0.3 undecidable manual S 139 4.7952 0.55 0.17
IV.RAVA.EHZ. 2012-05-21T16:37:35.91 0.1 positive manual P 231 19.1697 0.03 0.05
IV.T0812.EHZ. 2012-05-21T16:37:35.02 0.3 negative manual P 315 13.9749 0.21 0.13
IV.SERM.HNZ. 2012-05-21T16:37:35.68 1.0 undecidable manual P 357 16.0728 0.38 0.5
IV.T0811.EHZ. 2012-05-21T16:37:34.07 0.1 positive manual P 215 10.9779 -0.07 0.05
IV.T0813.EHZ. 2012-05-21T16:37:33.89 0.1 negative manual P 279 8.4804 0.08 0.05
IV.T0822.EHZ. 2012-05-21T16:37:33.33 0.3 undecidable manual P 139 4.7952 0.32 0.13
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SERM.HNE. ML:4.1 0.127 1.04 AML other m 2012-05-21T16:37:46.00
IV.SERM.HNN. ML:4.2 0.151 0.6 AML other m 2012-05-21T16:37:45.28
IV.SERM.EHE. ML:4.1 0.1415 1.08 AML other m 2012-05-21T16:37:45.58
IV.T0820.HNE. ML:4.1 0.0831499975 1.34 AML other m 2012-05-21T16:37:54.84
IV.T0820.HNN. ML:4.1 0.0862000005 1.24 AML other m 2012-05-21T16:37:53.71
IV.T0820.HHE. ML:4.1 0.0839000015 1.1 AML other m 2012-05-21T16:37:50.19
IV.T0820.HHN. ML:4.0 0.078400002 0.5 AML other m 2012-05-21T16:37:54.59
IV.FIU.EHE. ML:4.2 0.08125 1.24 AML other m 2012-05-21T16:37:57.58
IV.NOVE.EHN. ML:4.1 0.033800000499999996 0.92 AML other m 2012-05-21T16:37:50.72
IV.PRMA.HHE. ML:4.0 0.015149999999999999 1.36 AML other m 2012-05-21T16:38:04.56
IV.PRMA.HHN. ML:4.1 0.0164499995 0.72 AML other m 2012-05-21T16:38:04.07
IV.BRIS.HNE. ML:4.0 0.014199999999999999 1.02 AML other m 2012-05-21T16:38:02.97
IV.BDI.HNE. ML:4.1 0.011460000000000001 1.14 AML other m 2012-05-21T16:38:10.74
IV.BDI.HNN. ML:4.0 0.010065 1.32 AML other m 2012-05-21T16:38:17.95
IV.BDI.HHE. ML:4.1 0.010865 1.22 AML other m 2012-05-21T16:38:10.72
IV.BDI.HHN. ML:4.0 0.010365000000000001 0.5 AML other m 2012-05-21T16:38:16.50
GU.POPM.HHN. ML:4.0 0.01025 1.08 AML other m 2012-05-21T16:38:17.14
IV.SFI.HNN. ML:4.0 0.007845 1.2 AML other m 2012-05-21T16:38:10.33
IV.SFI.EHN. ML:4.0 0.008175 1.2 AML other m 2012-05-21T16:38:09.73
GU.MAIM.HHE. ML:4.1 0.008320000000000001 1.04 AML other m 2012-05-21T16:38:20.16
GU.MAIM.HHN. ML:4.1 0.008594999999999998 0.92 AML other m 2012-05-21T16:38:12.63
IV.RSM2.HHE. ML:4.1 0.007175000000000001 1.06 AML other m 2012-05-21T16:38:27.52
IV.CPGN.HNN. ML:4.1 0.00774 1.2 AML other m 2012-05-21T16:38:28.77
IV.CPGN.EHE. ML:4.0 0.00562 1.08 AML other m 2012-05-21T16:38:24.49
IV.CPGN.EHN. ML:4.2 0.007755 1.2 AML other m 2012-05-21T16:38:28.80
IV.MSSA.HHE. ML:4.0 0.005064999999999999 0.96 AML other m 2012-05-21T16:38:28.97
IV.PESA.HHN. ML:4.1 0.00542 1 AML other m 2012-05-21T16:38:21.04
IV.ATMC.EHE. ML:4.0 0.003875 0.78 AML other m 2012-05-21T16:38:31.37
IV.FSSB.HHN. ML:4.0 0.0038250000000000003 1.38 AML other m 2012-05-21T16:38:29.17
IV.ATBU.EHN. ML:4.2 0.00519 0.78 AML other m 2012-05-21T16:38:47.43
IV.ATMI.HHN. ML:4.1 0.004095 1.58 AML other m 2012-05-21T16:38:41.68
IV.MURB.HNE. ML:4.1 0.0035800000000000003 0.82 AML other m 2012-05-21T16:38:51.14
IV.MURB.HNN. ML:4.1 0.0034349999999999997 0.82 AML other m 2012-05-21T16:38:49.33
IV.MURB.HHE. ML:4.1 0.003645 0.8 AML other m 2012-05-21T16:38:56.07
IV.MURB.HHN. ML:4.1 0.0035549999999999996 0.84 AML other m 2012-05-21T16:38:49.33
RF.GEPF.HHE. ML:4.1 0.0034649999999999998 0.5 AML other m 2012-05-21T16:38:44.56
RF.GEPF.HHN. ML:4.2 0.004005 0.78 AML other m 2012-05-21T16:38:56.45
NI.VINO.HHE. ML:4.0 0.002755 0.54 AML other m 2012-05-21T16:38:44.46
NI.VINO.HHN. ML:4.2 0.004135 0.82 AML other m 2012-05-21T16:38:43.71
GU.PCP.HHE. ML:4.0 0.00262 0.5 AML other m 2012-05-21T16:38:39.67
GU.PCP.HHN. ML:4.2 0.00362 0.6 AML other m 2012-05-21T16:38:39.10
IV.VARE.HHE. ML:4.1 0.002645 0.44 AML other m 2012-05-21T16:38:39.31
IV.PTCC.HHE. ML:4.2 0.00327 0.96 AML other m 2012-05-21T16:38:48.58
IV.PTCC.HHN. ML:4.1 0.002855 0.62 AML other m 2012-05-21T16:38:49.65
GU.FINB.HHE. ML:4.2 0.002685 0.36 AML other m 2012-05-21T16:38:49.25
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, 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.
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