Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.9 on date 21-05-2012 and time 06:51:40 (Italy) in region 4 km N Finale Emilia (MO)

A magnitude ML 2.9 earthquake occured in region: 4 km N Finale Emilia (MO), on

  • 21-05-2012 04:51:40 (UTC)
  • 21-05-2012 06:51:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.8650, 11.2870 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.

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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 4 15699 15699
Bondeno FE 11 14655 30354
Sant'Agostino FE 11 6853 37207
San Felice sul Panaro MO 12 10900 48107
Felonica MN 14 1359 49466
Mirabello FE 14 3266 52732
Camposanto MO 14 3201 55933
Ficarolo RO 15 2438 58371
Calto RO 15 743 59114
Cento FE 15 35686 94800
Sermide MN 16 6189 100989
Pieve di Cento BO 17 7019 108008
Medolla MO 17 6308 114316
Vigarano Mainarda FE 17 7694 122010
Castelmassa RO 17 4252 126262
Salara RO 17 1160 127422
Mirandola MO 18 23875 151297
Magnacavallo MN 18 1561 152858
Galliera BO 18 5439 158297
Ceneselli RO 18 1719 160016
Gaiba RO 18 1063 161079
Castelnovo Bariano RO 18 2762 163841
Poggio Rusco MN 18 6625 170466
Crevalcore BO 19 13465 183931
Poggio Renatico FE 19 9852 193783
Carbonara di Po MN 20 1297 195080
San Giovanni del Dosso MN 20 1248 196328

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km W of Ferrara (133155 inhabitants)
33 Km E of Carpi (70699 inhabitants)
37 Km NE of Modena (184973 inhabitants)
41 Km N of Bologna (386663 inhabitants)
46 Km W of Rovigo (51867 inhabitants)
55 Km E of Reggio nell'Emilia (171345 inhabitants)
66 Km NW of Imola (69797 inhabitants)
68 Km SE of Verona (258765 inhabitants)
76 Km E of Parma (192836 inhabitants)
76 Km SW of Padova (210401 inhabitants)
79 Km S of Vicenza (112953 inhabitants)
80 Km NW of Faenza (58541 inhabitants)
88 Km NW of Ravenna (159116 inhabitants)
93 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
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 http://www.hsit.it. 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
Reviewed
Rev100 		ML 2.9 2012-05-21
04:51:40		 44.9017 11.3328 1 2014-10-21
12:19:34		 Sala Sismica INGV-Roma 1344191
Bulletin
Rev1000 		ML 2.9 2012-05-21
04:51:40		 44.8652 11.2867 4 2014-09-19
08:14:18		 Bollettino Sismico Italiano INGV integrato con i dati della Rete Sismica di emergenza 5891171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-05-21 04:51:40 ± 0.03
Latitude 44.8652 ± 0.0009
Longitude 11.2867 ± 0.0025
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> REMO-INGV
Event type earthquake
Origin ID 5891171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 387
Semi-minor axis of confidence ellipse (meter) 47
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 41
Circular confidence region, given by single value of horizontal uncertainty (meter) 200.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3169
Epicentral distance of station closest to the epicenter (degree) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 1.07829
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:2.9

Field Value
Value 2.9
Uncertainty 0.4
Num. used stations 0
Type of magnitude ML
Reference to an origin 1344191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2012-05-21 07:10:26

ML:2.9

Field Value
Value 2.9
Uncertainty 0.4
Num. used stations 31
Type of magnitude ML
Reference to an origin 5891171
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2014-09-18 12:47:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
NI.CGRP.HHZ. 2012-05-21T04:52:16.58 1.0 undecidable manual S 20 119.6913 -0.46 0
IV.MAGA.HHZ. 2012-05-21T04:52:15.73 0.6 undecidable manual S 333 113.3976 0.08 0
IV.SALO.HHZ. 2012-05-21T04:52:13.17 1.0 undecidable manual S 325 102.7194 -0.71 0
IV.ROVR.HHZ. 2012-05-21T04:52:08.11 0.6 undecidable manual S 349 88.3449 -1.38 2.55
IV.TEOL.HHZ. 2012-05-21T04:52:01.28 0.3 undecidable manual S 29 62.8926 -1.44 0.26
IV.BDI.HHZ. 2012-05-21T04:52:00.48 0.6 undecidable manual P 212 104.5176 1.36 0.95
IV.MAGA.HHZ. 2012-05-21T04:52:00.40 0.3 negative manual P 333 113.3976 0.45 0
NI.CGRP.HHZ. 2012-05-21T04:52:00.75 1.0 undecidable manual P 20 119.6913 -0.29 0
MN.VLC.HHZ. 2012-05-21T04:52:00.19 1.0 undecidable manual P 223 106.0161 0.64 1.67
IV.SALO.HHZ. 2012-05-21T04:51:58.90 0.6 undecidable manual P 325 102.7194 0.06 0
IV.SEI.SHZ. 2012-05-21T04:51:58.64 0.6 undecidable manual P 176 90.1431 1.59 1.1
IV.ERBM.EHZ. 2012-05-21T04:51:57.58 0.6 undecidable manual P 235 85.0482 0.77 0.42
IV.ROVR.HHZ. 2012-05-21T04:51:56.10 0.3 negative manual P 349 88.3449 -0.12 0.59
IV.BRIS.HHZ. 2012-05-21T04:51:56.81 0.3 undecidable manual P 152 80.6637 1.74 0.92
IV.MTRZ.HHZ. 2012-05-21T04:51:54.15 0.6 undecidable manual P 170 62.1933 1.13 1.27
IV.ZCCA.HHZ. 2012-05-21T04:51:53.75 0.1 positive manual P 203 62.0934 0.72 0.09
IV.TEOL.HHZ. 2012-05-21T04:51:52.01 0.3 negative manual P 29 62.8926 -0.38 0.16
IV.FIU.EHZ. 2012-05-21T04:51:51.20 0.6 undecidable manual S 147 29.748 -1.34 4.11
IV.SBPO.HHZ. 2012-05-21T04:51:50.94 0.6 undecidable manual P 306 35.5422 2.65 0.26
IV.RAVA.EHZ. 2012-05-21T04:51:49.30 0.6 undecidable manual S 228 17.9709 0.05 0.33
IV.T0812.EHZ. 2012-05-21T04:51:47.77 1.0 undecidable manual S 320 12.9759 0.27 2.22
IV.T0811.EHZ. 2012-05-21T04:51:46.08 0.6 undecidable manual S 208 10.1787 -0.04 0.34
IV.FIU.EHZ. 2012-05-21T04:51:46.37 0.6 undecidable manual P 147 29.748 -0.31 0.69
IV.T0814.EHZ. 2012-05-21T04:51:46.23 0.1 positive manual P 252 26.3514 -0.09 0.05
IV.T0822.EHZ. 2012-05-21T04:51:45.01 0.6 undecidable manual S 128 5.8941 0.32 0.35
IV.T0813.EHZ. 2012-05-21T04:51:45.46 0.6 undecidable manual S 282 7.0929 0.32 0.8
IV.SERM.HNZ. 2012-05-21T04:51:44.66 0.3 undecidable manual P 3 16.0728 0.14 0.15
IV.RAVA.EHZ. 2012-05-21T04:51:44.80 0.1 negative manual P 228 17.9709 -0.09 0.05
IV.T0811.EHZ. 2012-05-21T04:51:43.02 0.1 negative manual P 208 10.1787 -0.19 0.05
IV.T0812.EHZ. 2012-05-21T04:51:43.85 0.1 negative manual P 320 12.9759 -0.01 0.06
IV.T0822.EHZ. 2012-05-21T04:51:42.57 0.1 positive manual P 128 5.8941 0.04 0.05
IV.T0813.EHZ. 2012-05-21T04:51:42.82 0.1 negative manual P 282 7.0929 0.06 0.06
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RAVA.EHN. ML:3.3 0.018449999999999998 0.18 AML other m 2012-05-21T04:51:49.48
IV.RAVA.EHE. ML:3.3 0.019649999999999997 0.2 AML other m 2012-05-21T04:51:49.58
IV.SERM.EHN. ML:2.7 0.005465 0.3 AML other m 2012-05-21T04:51:50.43
IV.SERM.EHE. ML:2.5 0.0033250000000000003 1.1 AML other m 2012-05-21T04:51:54.30
IV.FIU.EHN. ML:3.1 0.006955 0.4 AML other m 2012-05-21T04:51:59.38
IV.FIU.EHE. ML:3.0 0.0045449999999999996 1.16 AML other m 2012-05-21T04:51:59.66
IV.TEOL.HHN. ML:3.1 0.0025800000000000003 0.34 AML other m 2012-05-21T04:52:05.40
IV.TEOL.HHE. ML:3.3 0.00357 0.28 AML other m 2012-05-21T04:52:05.64
IV.IMOL.HNN. ML:2.8 0.0012445 0.92 AML other m 2012-05-21T04:52:09.69
IV.ZCCA.HHE. ML:2.5 0.0005800000000000001 0.38 AML other m 2012-05-21T04:52:09.91
IV.BRIS.HHE. ML:2.3 0.0002875 0.34 AML other m 2012-05-21T04:52:11.04
IV.ROVR.HHE. ML:3.3 0.0024100000000000002 0.4 AML other m 2012-05-21T04:52:10.96
IV.ROVR.HHN. ML:3.5 0.00379 0.26 AML other m 2012-05-21T04:52:11.05
IV.BRIS.HHN. ML:2.1 0.000191 0.26 AML other m 2012-05-21T04:52:11.52
IV.ZCCA.HHN. ML:2.3 0.00041549999999999996 0.5 AML other m 2012-05-21T04:52:13.03
IV.SALO.HHE. ML:3.2 0.00148 0.72 AML other m 2012-05-21T04:52:15.18
IV.SALO.HHN. ML:3.1 0.0012900000000000001 0.5 AML other m 2012-05-21T04:52:15.94
IV.MAGA.HHE. ML:4.0 0.0073100000000000005 0.38 AML other m 2012-05-21T04:52:17.71
IV.MAGA.HHN. ML:3.8 0.005055 0.38 AML other m 2012-05-21T04:52:17.92
MN.VLC.HHE. ML:2.2 0.000151 0.62 AML other m 2012-05-21T04:52:18.24
IV.SFI.EHN. ML:2.7 0.000378 1.38 AML other m 2012-05-21T04:52:18.98
IV.BDI.HHE. ML:2.6 0.00035099999999999997 0.88 AML other m 2012-05-21T04:52:19.24
IV.BDI.HNE. ML:2.6 0.0004015 0.86 AML other m 2012-05-21T04:52:19.25
IV.SFI.EHE. ML:2.5 0.000243 1.18 AML other m 2012-05-21T04:52:20.27
IV.CRMI.HHN. ML:2.3 0.00015 0.56 AML other m 2012-05-21T04:52:20.46
IV.CRMI.HHE. ML:2.4 0.00019250000000000002 1.08 AML other m 2012-05-21T04:52:21.10
IV.SNTG.HHN. ML:2.5 0.00008195 1.16 AML other m 2012-05-21T04:52:21.87
IV.CTI.HHN. ML:3.6 0.0022600000000000003 0.24 AML other m 2012-05-21T04:52:21.66
IV.CTI.HHE. ML:3.4 0.0017250000000000002 0.7 AML other m 2012-05-21T04:52:21.89
IV.ASQU.HHN. ML:2.5 0.000242 1.58 AML other m 2012-05-21T04:52:22.92
IV.ASQU.HHE. ML:2.5 0.00021650000000000003 0.36 AML other m 2012-05-21T04:52:23.44
IV.BDI.HHN. ML:2.7 0.0005 0.5 AML other m 2012-05-21T04:52:24.83
IV.BDI.HNN. ML:2.7 0.000459 0.5 AML other m 2012-05-21T04:52:24.84
MN.VLC.HHN. ML:2.2 0.00014000000000000001 0.76 AML other m 2012-05-21T04:52:30.94
NI.POLC.HHN. ML:3.2 0.000761 0.42 AML other m 2012-05-21T04:52:31.61
NI.AGOR.HHE. ML:2.8 0.0003155 0.3 AML other m 2012-05-21T04:52:32.78
NI.POLC.HHE. ML:3.0 0.000437 0.58 AML other m 2012-05-21T04:52:32.50
SI.KOSI.HHE. ML:3.4 0.0008765000000000001 0.34 AML other m 2012-05-21T04:52:32.98
IV.APPI.EHE. ML:3.4 0.0008274999999999999 0.36 AML other m 2012-05-21T04:52:33.87
NI.AGOR.HHN. ML:3.0 0.00039850000000000004 0.36 AML other m 2012-05-21T04:52:34.01
IV.APPI.EHN. ML:3.2 0.0006414999999999999 0.48 AML other m 2012-05-21T04:52:33.97
SI.KOSI.HHN. ML:3.2 0.0005620000000000001 0.62 AML other m 2012-05-21T04:52:35.77
IV.BRMO.HHE. ML:3.0 0.00028599999999999996 0.56 AML other m 2012-05-21T04:52:37.77
IV.BRMO.HHN. ML:2.8 0.000202 0.34 AML other m 2012-05-21T04:52:38.10
IV.MSSA.HHN. ML:2.7 0.000264 0.58 AML other m 2012-05-21T04:52:38.31
IV.PIEI.HHE. ML:2.5 0.00011549999999999999 0.62 AML other m 2012-05-21T04:52:39.40
SI.MOSI.HHN. ML:3.5 0.0009274999999999999 0.88 AML other m 2012-05-21T04:52:40.65
IV.MSSA.HHE. ML:2.4 0.00011399999999999999 0.94 AML other m 2012-05-21T04:52:41.11
IV.PIEI.HHN. ML:2.3 0.0000774 0.8 AML other m 2012-05-21T04:52:40.72
SI.ABSI.HHN. ML:3.4 0.0006365 0.44 AML other m 2012-05-21T04:52:41.26
SI.ABSI.HHE. ML:3.2 0.0004485 0.48 AML other m 2012-05-21T04:52:42.11
SI.MOSI.HHE. ML:3.3 0.000535 0.7 AML other m 2012-05-21T04:52:42.71
IV.NARO.HHN. ML:2.3 0.0000735 0.54 AML other m 2012-05-21T04:52:44.51
IV.NARO.HHE. ML:2.3 0.0000766 1.02 AML other m 2012-05-21T04:52:44.37
IV.ATVO.HHE. ML:2.5 0.00011449999999999999 1.04 AML other m 2012-05-21T04:52:47.02
IV.ATBU.EHN. ML:2.8 0.0002395 0.42 AML other m 2012-05-21T04:52:47.91
IV.ATVO.HHN. ML:2.4 0.00009525 0.68 AML other m 2012-05-21T04:52:48.86
SI.RISI.HHN. ML:3.3 0.00038500000000000003 0.42 AML other m 2012-05-21T04:52:51.98
IV.ATBU.EHE. ML:2.9 0.00028100000000000005 0.52 AML other m 2012-05-21T04:52:52.71
IV.IMOL.HNE. ML:2.7 0.000877 0.98 AML other m 2012-05-21T04:52:52.00
IV.SNTG.HHE. ML:2.4 0.00006875 0.44 AML other m 2012-05-21T04:52:56.70
NI.ACOM.HHN. ML:2.9 0.00013000000000000002 0.54 AML other m 2012-05-21T04:52:58.47
SI.RISI.HHE. ML:3.3 0.00039600000000000003 0.48 AML other m 2012-05-21T04:52:59.76
NI.ACOM.HHE. ML:3.0 0.00020250000000000002 0.8 AML other m 2012-05-21T04:53:06.49
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