Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.8 on date 20-05-2012 and time 03:50:45 (UTC) in region 7 km NE San Felice sul Panaro (MO)

A magnitude ML 2.8 earthquake occured in region: 7 km NE San Felice sul Panaro (MO), on

  • 20-05-2012 03:50:45 (UTC)
  • 20-05-2012 05:50:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.8790, 11.2170 at 5 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
San Felice sul Panaro MO 7 10900 10900
Finale Emilia MO 8 15699 26599
Medolla MO 12 6308 32907
Camposanto MO 12 3201 36108
Mirandola MO 12 23875 59983
Poggio Rusco MN 13 6625 66608
Magnacavallo MN 14 1561 68169
San Giovanni del Dosso MN 14 1248 69417
Cavezzo MO 15 7026 76443
Villa Poma MN 16 2023 78466
Sermide MN 16 6189 84655
Felonica MN 16 1359 86014
Bondeno FE 16 14655 100669
Sant'Agostino FE 17 6853 107522
Schivenoglia MN 17 1203 108725
Calto RO 17 743 109468
Castelmassa RO 17 4252 113720
San Possidonio MO 17 3619 117339
Castelnovo Bariano RO 17 2762 120101
Carbonara di Po MN 18 1297 121398
San Giacomo delle Segnate MN 18 1639 123037
Cento FE 18 35686 158723
Crevalcore BO 18 13465 172188
San Prospero MO 18 5860 178048
Concordia sulla Secchia MO 19 8641 186689
Ficarolo RO 19 2438 189127
Borgofranco sul Po MN 19 784 189911
Pieve di Coriano MN 19 1035 190946
Ceneselli RO 19 1719 192665
Ravarino MO 19 6233 198898
Pieve di Cento BO 20 7019 205917

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Carpi (70699 inhabitants)
32 Km W of Ferrara (133155 inhabitants)
35 Km NE of Modena (184973 inhabitants)
44 Km N of Bologna (386663 inhabitants)
50 Km W of Rovigo (51867 inhabitants)
50 Km E of Reggio nell'Emilia (171345 inhabitants)
65 Km S of Verona (258765 inhabitants)
71 Km NW of Imola (69797 inhabitants)
71 Km E of Parma (192836 inhabitants)
78 Km SW of Padova (210401 inhabitants)
79 Km SW of Vicenza (112953 inhabitants)
85 Km NW of Faenza (58541 inhabitants)
93 Km NW of Ravenna (159116 inhabitants)
98 Km NW of Forlì (117913 inhabitants)
98 Km E of Cremona (71901 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
Bulletin
Rev1000 		ML 2.8 2012-05-20
03:50:45		 44.8792 11.2167 5 2014-09-19
08:14:18		 Bollettino Sismico Italiano INGV 4887151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-05-20 03:50:45 ± 0.23
Latitude 44.8792 ± 0.0072
Longitude 11.2167 ± 0.0190
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 4887151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1579
Semi-minor axis of confidence ellipse (meter) 164
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 292
Circular confidence region, given by single value of horizontal uncertainty (meter) 1580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.52
Epicentral distance of station closest to the epicenter (degree) 0.14119
Epicentral distance of station farthest from the epicenter (degree) 1.27794
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitude information

ML:2.8

Field Value
Value 2.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 4887151
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2014-09-18 12:47:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PLMA.HHZ. 2012-05-20T03:51:12.50 0.6 undecidable manual P 230 141.8469 38 -0.29 39
IV.MABI.HHZ. 2012-05-20T03:51:11.65 1.0 undecidable manual P 338 141.4473 38 -1.08 15
IV.ASQU.HHZ. 2012-05-20T03:51:10.87 0.6 undecidable manual P 159 128.3715 38 0.16 42
IV.CRMI.HHZ. 2012-05-20T03:51:09.65 0.3 undecidable manual P 189 121.6893 38 -0.02 65
GU.MAIM.HHZ. 2012-05-20T03:51:09.98 1.0 undecidable manual P 208 121.4895 38 0.34 20
IV.LEOD.HNE. 2012-05-20T03:51:08.72 0.6 undecidable manual P 307 106.9152 38 1.34 28
MN.VLC.HHZ. 2012-05-20T03:51:07.64 0.6 undecidable manual P 220 103.4187 38 0.81 36
IV.SALO.HHE. 2012-05-20T03:51:06.71 0.6 undecidable manual P 327 98.2239 38 0.69 38
IV.BOTT.HNE. 2012-05-20T03:51:06.94 0.3 undecidable manual P 317 102.7194 38 0.21 65
IV.ZEN8.HNE. 2012-05-20T03:51:05.44 0.6 undecidable manual P 336 92.241 38 0.34 43
IV.SANR.HNE. 2012-05-20T03:51:04.68 0.6 undecidable manual P 20 89.8434 38 -0.04 46
IV.BRIS.HHZ. 2012-05-20T03:51:04.43 0.3 undecidable manual P 149 84.6486 38 0.51 63
IV.FNVD.HHE. 2012-05-20T03:51:03.15 0.6 undecidable manual P 185 79.2651 38 0.07 47
IV.IMOL.EHE. 2012-05-20T03:51:03.25 0.3 undecidable manual P 144 71.0733 38 1.45 42
IV.ERBM.EHE. 2012-05-20T03:51:03.98 0.3 undecidable manual P 231 81.4518 38 0.57 62
IV.ZCCA.HHE. 2012-05-20T03:51:00.63 0.6 undecidable manual P 198 61.5939 38 0.29 46
IV.ZOVE.HNZ. 2012-05-20T03:51:00.54 0.3 undecidable manual P 18 67.1772 38 -0.66 62
IV.TEOL.HHE. 2012-05-20T03:50:59.73 1.0 undecidable manual P 34 64.3911 38 -1.04 18
IV.OPPE.HNE. 2012-05-20T03:50:57.41 0.6 undecidable manual P 356 47.7189 50 -1.51 28
IV.SERM.EHZ. 2012-05-20T03:50:55.70 0.6 undecidable manual S 23 15.7731 108 0.57 47
IV.NOVE.EHE. 2012-05-20T03:50:55.62 0.3 undecidable manual P 257 40.4262 50 -1.47 44
IV.RAVA.EHZ. 2012-05-20T03:50:55.10 0.3 undecidable manual S 209 15.6732 108 0.01 80
IV.MODE.HNE. 2012-05-20T03:50:54.82 0.3 undecidable manual P 217 34.743 50 -0.86 60
IV.FIU.EHZ. 2012-05-20T03:50:54.14 0.1 undecidable manual P 141 34.2435 50 -1.4 61
IV.RAVA.EHZ. 2012-05-20T03:50:51.28 0.1 undecidable manual P 209 15.6732 108 0.32 100
IV.SERM.EHZ. 2012-05-20T03:50:50.90 0.3 undecidable manual P 23 15.7731 108 -0.08 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASQU.HHN. ML:2.8 0.00045799999999999997 0.58 AML other m 2012-05-20T03:51:31.04
IV.ASQU.HHE. ML:2.9 0.000494 0.44 AML other m 2012-05-20T03:51:31.69
IV.BRIS.HHN. ML:2.5 0.000425 0.44 AML other m 2012-05-20T03:51:19.54
IV.BRIS.HHE. ML:2.6 0.0005105 0.42 AML other m 2012-05-20T03:51:19.48
IV.CRMI.HHE. ML:2.9 0.000524 0.44 AML other m 2012-05-20T03:51:27.21
IV.CRMI.HHN. ML:2.7 0.00038549999999999994 0.5 AML other m 2012-05-20T03:51:27.44
GU.MAIM.HHN. ML:2.9 0.0005625 0.44 AML other m 2012-05-20T03:51:29.48
GU.MAIM.HHE. ML:3.1 0.0008335 0.42 AML other m 2012-05-20T03:51:29.81
IV.PLMA.HHE. ML:3.0 0.000544 1.1 AML other m 2012-05-20T03:51:33.53
IV.PLMA.HHN. ML:3.0 0.0005595 0.38 AML other m 2012-05-20T03:51:35.97
IV.PRMA.HHN. ML:2.8 0.0010689999999999999 1.3 AML other m 2012-05-20T03:51:18.62
IV.PRMA.HHE. ML:2.8 0.001105 0.7 AML other m 2012-05-20T03:51:19.82
MN.VLC.HHN. ML:2.5 0.0002855 0.6 AML other m 2012-05-20T03:51:31.68
MN.VLC.HHE. ML:2.4 0.000234 0.6 AML other m 2012-05-20T03:51:30.95
IV.ZOVE.HNN. ML:3.2 0.002715 0.58 AML other m 2012-05-20T03:51:09.84
IV.ZOVE.HNE. ML:3.1 0.002355 0.44 AML other m 2012-05-20T03:51:09.94
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