Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.6 on date 20-05-2012 and time 03:20:09 (UTC) in region 5 km W Bondeno (FE)

A magnitude ML 2.6 earthquake occured in region: 5 km W Bondeno (FE), on

  • 20-05-2012 03:20:09 (UTC)
  • 20-05-2012 05:20:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.8650, 11.3560 at 10 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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Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Bondeno FE 6 14655 14655
Finale Emilia MO 6 15699 30354
Sant'Agostino FE 8 6853 37207
Mirabello FE 9 3266 40473
Ficarolo RO 12 2438 42911
Vigarano Mainarda FE 12 7694 50605
Felonica MN 13 1359 51964
Gaiba RO 14 1063 53027
Calto RO 14 743 53770
Salara RO 14 1160 54930
Galliera BO 15 5439 60369
Poggio Renatico FE 15 9852 70221
Cento FE 16 35686 105907
Sermide MN 16 6189 112096
Ceneselli RO 17 1719 113815
Stienta RO 17 3253 117068
San Felice sul Panaro MO 17 10900 127968
Pieve di Cento BO 17 7019 134987
Castelmassa RO 17 4252 139239
San Pietro in Casale BO 18 12202 151441
Occhiobello RO 19 11979 163420
Castelnovo Bariano RO 19 2762 166182
Camposanto MO 19 3201 169383

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km W of Ferrara (133155 inhabitants)
38 Km E of Carpi (70699 inhabitants)
41 Km SW of Rovigo (51867 inhabitants)
41 Km N of Bologna (386663 inhabitants)
42 Km NE of Modena (184973 inhabitants)
60 Km E of Reggio nell'Emilia (171345 inhabitants)
64 Km NW of Imola (69797 inhabitants)
70 Km SE of Verona (258765 inhabitants)
73 Km SW of Padova (210401 inhabitants)
77 Km NW of Faenza (58541 inhabitants)
77 Km S of Vicenza (112953 inhabitants)
81 Km E of Parma (192836 inhabitants)
83 Km NW of Ravenna (159116 inhabitants)
90 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
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 2.8 2012-05-20
03:20:09		 45.0748 11.0687 10 2014-10-21
12:19:34		 Sala Sismica INGV-Roma 1317891
Bulletin
Rev1000 		ML 2.6 2012-05-20
03:20:09		 44.8653 11.3563 10 2014-09-19
08:14:18		 Bollettino Sismico Italiano INGV 4883711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-05-20 03:20:09 ± 0.25
Latitude 44.8653 ± 0.0099
Longitude 11.3563 ± 0.0228
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 4883711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1800
Semi-minor axis of confidence ellipse (meter) 1070
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
Circular confidence region, given by single value of horizontal uncertainty (meter) 1800.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.61
Epicentral distance of station closest to the epicenter (degree) 0.15109
Epicentral distance of station farthest from the epicenter (degree) 1.32740
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.6

Field Value
Value 2.6
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 4883711
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2014-09-18 12:47:05

ML:2.8

Field Value
Value 2.8
Uncertainty 0.5
Num. used stations 0
Type of magnitude ML
Reference to an origin 1317891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2012-05-20 05:34:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MABI.HHZ. 2012-05-20T03:20:35.74 0.6 undecidable manual P 334 147.3414 38 -0.64 45
IV.CRMI.HHZ. 2012-05-20T03:20:32.69 0.3 undecidable manual P 194 122.3886 38 0.19 80
IV.BDI.HHE. 2012-05-20T03:20:30.83 0.6 undecidable manual P 214 107.4147 38 0.65 48
GU.POPM.HHZ. 2012-05-20T03:20:29.75 1.0 undecidable manual P 208 102.6195 38 0.32 27
IV.SALO.HHZ. 2012-05-20T03:20:29.91 0.3 undecidable manual P 322 105.8163 38 -0.02 85
IV.SEI.SHZ. 2012-05-20T03:20:28.82 0.3 undecidable manual P 180 89.9433 38 1.35 54
IV.FNVD.HHE. 2012-05-20T03:20:27.48 0.6 undecidable manual P 194 79.5648 38 1.63 31
IV.BRIS.HHZ. 2012-05-20T03:20:27.00 0.3 undecidable manual P 155 78.1662 38 1.37 55
IV.IMOL.EHZ. 2012-05-20T03:20:24.81 0.6 undecidable manual P 151 63.8916 38 1.4 37
IV.ZCCA.HHZ. 2012-05-20T03:20:23.93 0.3 undecidable manual P 208 64.491 38 0.42 85
IV.TEOL.HHZ. 2012-05-20T03:20:22.05 0.6 undecidable manual P 24 60.3951 38 -0.83 49
IV.SBPO.HHE. 2012-05-20T03:20:21.69 0.6 undecidable manual P 301 40.0266 50 1.46 37
IV.FIU.EHZ. 2012-05-20T03:20:21.20 0.6 undecidable manual S 157 27.1506 50 -1.2 44
IV.NOVE.EHE. 2012-05-20T03:20:21.23 0.6 undecidable manual P 262 50.9157 38 -0.17 61
IV.RAVA.EHZ. 2012-05-20T03:20:20.00 0.6 undecidable manual S 237 22.2555 50 -0.27 63
IV.SERM.EHZ. 2012-05-20T03:20:17.80 0.6 undecidable manual S 344 16.7721 50 -0.04 67
IV.FIU.EHZ. 2012-05-20T03:20:15.80 0.1 undecidable manual P 157 27.1506 50 -1.21 87
IV.RAVA.EHZ. 2012-05-20T03:20:14.85 0.1 undecidable manual P 237 22.2555 50 -0.95 100
IV.SERM.EHZ. 2012-05-20T03:20:13.97 0.3 undecidable manual P 344 16.7721 50 -0.44 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FIU.EHN. ML:2.7 0.0027800000000000004 0.14 AML other m 2012-05-20T03:20:29.28
IV.FIU.EHE. ML:2.8 0.0029950000000000003 1.32 AML other m 2012-05-20T03:20:29.40
IV.RAVA.EHN. ML:3.1 0.00835 0.18 AML other m 2012-05-20T03:20:20.22
IV.RAVA.EHE. ML:3.2 0.011349999999999999 0.28 AML other m 2012-05-20T03:20:26.00
IV.SALO.HHE. ML:2.5 0.00027449999999999995 0.76 AML other m 2012-05-20T03:20:50.03
IV.SALO.HHN. ML:2.5 0.000273 0.56 AML other m 2012-05-20T03:20:59.72
IV.TEOL.HHN. ML:2.3 0.00039200000000000004 1.14 AML other m 2012-05-20T03:20:45.79
IV.TEOL.HHE. ML:2.3 0.00041000000000000005 1.48 AML other m 2012-05-20T03:20:48.05
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