Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.6 on date 25-03-2020 and time 09:42:30 (Italy) in region 2 km NW Casalfiumanese (BO)

A magnitude ML 2.6 earthquake occured in region: 2 km NW Casalfiumanese (BO), on

  • 25-03-2020 08:42:30 (UTC)
  • 25-03-2020 09:42:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3120, 11.5930 at 20 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
Casalfiumanese BO 3 3438 3438
Borgo Tossignano BO 4 3288 6726
Dozza BO 6 6652 13378
Fontanelice BO 7 1943 15321
Castel San Pietro Terme BO 10 20811 36132
Casola Valsenio RA 10 2617 38749
Imola BO 11 69797 108546
Riolo Terme RA 11 5720 114266
Castel del Rio BO 13 1246 115512
Monterenzio BO 15 6035 121547
Castel Guelfo di Bologna BO 15 4455 126002
Castel Bolognese RA 17 9554 135556
Brisighella RA 17 7639 143195
Ozzano dell'Emilia BO 17 13596 156791
Medicina BO 19 16739 173530
Mordano BO 20 4760 178290

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km W of Imola (69797 inhabitants)
23 Km W of Faenza (58541 inhabitants)
28 Km SE of Bologna (386663 inhabitants)
37 Km W of Forlì (117913 inhabitants)
50 Km W of Ravenna (159116 inhabitants)
55 Km W of Cesena (96758 inhabitants)
58 Km S of Ferrara (133155 inhabitants)
62 Km NE of Prato (191150 inhabitants)
65 Km SE of Modena (184973 inhabitants)
66 Km NE of Firenze (382808 inhabitants)
68 Km NE of Pistoia (90315 inhabitants)
70 Km NE of Scandicci (50609 inhabitants)
77 Km SE of Carpi (70699 inhabitants)
83 Km W of Rimini (147750 inhabitants)
86 Km S of Rovigo (51867 inhabitants)
88 Km E of Reggio nell'Emilia (171345 inhabitants)
97 Km N of Arezzo (99543 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
Bulletin
Rev1000 		ML 2.6 2020-03-25
08:42:30		 44.3123 11.5927 20 2020-07-18
21:08:38		 Bollettino Sismico Italiano INGV 79689861
Reviewed
Rev100 		ML 2.7 2020-03-25
08:42:30		 44.3228 11.5883 23 2020-03-25
08:57:21		 Sala Sismica INGV-Roma 77555371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-25 08:42:30 ± 0.13
Latitude 44.3123 ± 0.0072
Longitude 11.5927 ± 0.0113
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79689861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 873
Semi-minor axis of confidence ellipse (meter) 274
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 67
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.46
Epicentral distance of station closest to the epicenter (degree) 0.11691
Epicentral distance of station farthest from the epicenter (degree) 1.59360
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.6

Field Value
Value 2.6
Uncertainty 0.3
Num. used stations 46
Type of magnitude ML
Reference to an origin 79689861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-24 17:13:20

ML:2.7

Field Value
Value 2.7
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 77555371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-25 08:57:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZOVE.EHZ. 2020-03-25T08:43:08.33 0.3 undecidable manual S 356 126.873 94 1.29 40
IV.CSNT.HHZ. 2020-03-25T08:42:59.40 1.0 undecidable manual S 195 96.2259 96 0.51 20
ST.DOSS.HHZ. 2020-03-25T08:42:57.76 0.3 undecidable manual P 350 176.8896 54 -0.69 46
OX.CGRP.HHZ. 2020-03-25T08:42:57.46 0.3 undecidable manual P 5 174.7917 54 -0.73 46
IV.EL6.EHZ. 2020-03-25T08:42:57.82 0.6 undecidable manual P 132 162.7149 54 1.13 26
IV.MBAL.EHZ. 2020-03-25T08:42:56.10 0.3 undecidable manual P 340 164.1135 54 -0.76 48
IV.FOSV.EHZ. 2020-03-25T08:42:55.38 0.3 undecidable manual P 140 146.6421 54 0.69 50
IV.ZOVE.EHZ. 2020-03-25T08:42:51.40 0.1 undecidable manual P 356 126.873 94 -0.25 81
IV.TEOL.HHE. 2020-03-25T08:42:50.24 0.1 undecidable manual P 3 116.5944 95 0.17 84
IV.ASQU.HHZ. 2020-03-25T08:42:49.49 0.3 undecidable manual S 165 59.2962 101 0.35 68
IV.PII.HHZ. 2020-03-25T08:42:49.62 0.3 undecidable manual P 233 107.4147 95 0.95 49
MN.VLC.HHZ. 2020-03-25T08:42:48.71 0.3 undecidable manual P 260 97.3248 96 1.59 35
IV.MPPT.EHZ. 2020-03-25T08:42:48.80 0.3 undecidable manual S 226 56.0994 102 0.49 66
IV.SFI.EHZ. 2020-03-25T08:42:47.27 0.6 undecidable manual S 156 49.5171 103 0.68 42
GU.MAIM.HHZ. 2020-03-25T08:42:47.95 0.6 undecidable manual P 244 98.2239 96 0.7 37
IV.RUFI.EHZ. 2020-03-25T08:42:47.87 0.3 undecidable manual S 187 53.0025 102 0.37 69
GU.SARM.EHN. 2020-03-25T08:42:47.74 0.3 undecidable manual P 262 95.7264 96 0.86 52
IV.CSNT.HHZ. 2020-03-25T08:42:47.32 0.3 undecidable manual P 195 96.2259 96 0.38 63
IV.RINC.HHZ. 2020-03-25T08:42:46.70 0.3 undecidable manual S 179 47.2194 104 0.7 62
IV.PARC.HHZ. 2020-03-25T08:42:46.02 0.1 undecidable manual P 145 89.8434 97 0.04 91
IV.BDI.HNZ. 2020-03-25T08:42:45.05 0.3 undecidable manual P 251 84.0492 97 -0.03 70
IV.CRE.HHZ. 2020-03-25T08:42:44.83 0.3 undecidable manual P 159 82.0512 97 0.04 69
IV.FNVD.HHZ. 2020-03-25T08:42:44.19 0.6 undecidable manual S 247 40.626 107 -0.11 50
GU.POPM.HHZ. 2020-03-25T08:42:43.61 0.3 undecidable manual P 246 72.7716 98 0.24 67
IV.RONT.HHZ. 2020-03-25T08:42:43.95 0.6 undecidable manual S 200 37.629 109 0.42 46
IV.SEI.HHZ. 2020-03-25T08:42:42.25 0.6 undecidable manual S 213 34.1436 111 -0.42 47
IV.ASQU.HHZ. 2020-03-25T08:42:41.03 0.1 undecidable manual P 165 59.2962 101 -0.29 92
IV.LMD.HHZ. 2020-03-25T08:42:41.44 0.6 undecidable manual S 161 27.6501 117 0.37 48
IV.MPPT.EHZ. 2020-03-25T08:42:40.33 0.3 undecidable manual P 226 56.0994 102 -0.51 67
IV.RINC.HHZ. 2020-03-25T08:42:39.27 0.1 undecidable manual P 179 47.2194 104 -0.24 95
IV.BRIS.HHZ. 2020-03-25T08:42:39.11 0.3 undecidable manual S 125 16.872 133 0.38 74
IV.SFI.EHZ. 2020-03-25T08:42:39.48 0.1 undecidable manual P 156 49.5171 103 -0.37 92
IV.RUFI.EHZ. 2020-03-25T08:42:39.83 0.3 undecidable manual P 187 53.0025 102 -0.54 66
IV.VISG.HHZ. 2020-03-25T08:42:38.48 0.3 undecidable manual S 223 18.5703 130 -0.58 68
IV.FNVD.HHZ. 2020-03-25T08:42:38.03 0.1 undecidable manual P 247 40.626 107 -0.49 91
IV.MTRZ.HHZ. 2020-03-25T08:42:38.64 0.3 undecidable manual S 270 13.2756 141 0.56 71
IV.IMOL.EHZ. 2020-03-25T08:42:38.79 0.6 undecidable manual S 66 12.9759 142 0.77 44
IV.RONT.HHZ. 2020-03-25T08:42:37.53 0.3 undecidable manual P 200 37.629 109 -0.55 68
IV.SEI.HHZ. 2020-03-25T08:42:36.85 0.1 undecidable manual P 213 34.1436 111 -0.73 84
IV.BRIS.HHZ. 2020-03-25T08:42:35.09 0.1 undecidable manual P 125 16.872 133 -0.22 100
IV.IMOL.EHZ. 2020-03-25T08:42:35.22 0.1 undecidable manual P 66 12.9759 142 0.32 100
IV.LMD.HHZ. 2020-03-25T08:42:35.85 0.1 undecidable manual P 161 27.6501 117 -0.81 82
IV.VISG.HHZ. 2020-03-25T08:42:34.35 0.1 undecidable manual P 223 18.5703 130 -1.15 71
IV.MTRZ.HHZ. 2020-03-25T08:42:34.63 0.1 undecidable manual P 270 13.2756 141 -0.3 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:2.7 0.002785 1.28 AML other m 2020-03-25T08:42:38.27
IV.BRIS.HHE. ML:2.7 0.0032649999999999997 0.4 AML other m 2020-03-25T08:42:39.49
IV.VISG.HHN. ML:2.8 0.003785 0.72 AML other m 2020-03-25T08:42:39.59
IV.MTRZ.HHE. ML:2.9 0.005810000000000001 1.8 AML other m 2020-03-25T08:42:40.90
IV.MTRZ.HNE. ML:2.9 0.00549 1.8 AML other m 2020-03-25T08:42:40.90
IV.MTRZ.HHN. ML:3.2 0.009949999999999999 1.1 AML other m 2020-03-25T08:42:40.16
IV.MTRZ.HNN. ML:3.2 0.009595 1.1 AML other m 2020-03-25T08:42:40.16
IV.IMOL.HNE. ML:2.7 0.003215 0.56 AML other m 2020-03-25T08:42:40.28
IV.IMOL.HNN. ML:2.8 0.00479 0.8 AML other m 2020-03-25T08:42:41.88
IV.LMD.HHE. ML:2.9 0.0031900000000000006 0.42 AML other m 2020-03-25T08:42:41.84
IV.BRIS.HHN. ML:2.6 0.002685 0.26 AML other m 2020-03-25T08:42:41.56
IV.LMD.HHN. ML:3.0 0.00443 0.26 AML other m 2020-03-25T08:42:41.81
IV.SEI.HHN. ML:3.6 0.014150000000000001 0.36 AML other m 2020-03-25T08:42:42.79
IV.RONT.HHN. ML:3.2 0.00469 0.3 AML other m 2020-03-25T08:42:44.23
IV.SEI.HHE. ML:3.0 0.0038150000000000002 0.8 AML other m 2020-03-25T08:42:45.68
IV.SFI.HNE. ML:2.5 0.0008505 0.56 AML other m 2020-03-25T08:42:47.48
IV.SFI.EHE. ML:2.5 0.0008 0.54 AML other m 2020-03-25T08:42:47.49
IV.RONT.HHE. ML:3.3 0.006520000000000001 0.28 AML other m 2020-03-25T08:42:47.62
IV.RINC.HHE. ML:2.7 0.0014449999999999999 0.32 AML other m 2020-03-25T08:42:48.00
IV.SFI.HNN. ML:2.8 0.0014399999999999999 1.54 AML other m 2020-03-25T08:42:48.98
IV.SFI.EHN. ML:2.8 0.0014550000000000001 1.52 AML other m 2020-03-25T08:42:48.98
IV.RUFI.EHE. ML:2.2 0.000376 0.3 AML other m 2020-03-25T08:42:48.33
IV.MPPT.EHE. ML:2.4 0.0004975 0.68 AML other m 2020-03-25T08:42:49.42
IV.RUFI.EHN. ML:2.3 0.0005195 0.36 AML other m 2020-03-25T08:42:49.58
IV.MPPT.EHN. ML:2.2 0.00033350000000000003 1.3 AML other m 2020-03-25T08:42:49.70
IV.RINC.HHN. ML:2.6 0.001135 0.74 AML other m 2020-03-25T08:42:50.38
IV.ASQU.HHE. ML:2.6 0.0008145 1.3 AML other m 2020-03-25T08:42:50.19
IV.ASQU.HHN. ML:2.7 0.0010500000000000002 1.3 AML other m 2020-03-25T08:42:51.11
GU.POPM.HHN. ML:2.2 0.000214 1.26 AML other m 2020-03-25T08:42:54.34
GU.POPM.HHE. ML:2.1 0.00017549999999999998 0.76 AML other m 2020-03-25T08:42:57.38
IV.CRE.HHN. ML:2.5 0.00038250000000000003 0.28 AML other m 2020-03-25T08:42:59.18
IV.CRE.HHE. ML:2.4 0.0003045 0.44 AML other m 2020-03-25T08:43:00.55
IV.PARC.HHN. ML:2.2 0.00018744999999999998 0.62 AML other m 2020-03-25T08:43:02.65
IV.CSNT.HHE. ML:2.4 0.000246 0.48 AML other m 2020-03-25T08:43:03.52
IV.CSNT.HHN. ML:2.6 0.00036650000000000007 0.54 AML other m 2020-03-25T08:43:04.40
IV.PARC.HHE. ML:2.1 0.000142 0.76 AML other m 2020-03-25T08:43:06.73
IV.ZOVE.EHN. ML:2.7 0.00030649999999999997 1.2 AML other m 2020-03-25T08:43:10.11
IV.ZOVE.HNN. ML:2.6 0.00030199999999999997 0.74 AML other m 2020-03-25T08:43:10.11
IV.ZOVE.HNE. ML:2.7 0.00031800000000000003 0.44 AML other m 2020-03-25T08:43:10.43
IV.ZOVE.EHE. ML:2.7 0.00033899999999999995 0.44 AML other m 2020-03-25T08:43:10.44
IV.MBAL.EHE. ML:2.3 0.00008095 0.8 AML other m 2020-03-25T08:43:21.20
ST.DOSS.HHN. ML:2.6 0.0001565 0.62 AML other m 2020-03-25T08:43:23.53
IV.MBAL.EHN. ML:2.2 0.00007240000000000001 1.26 AML other m 2020-03-25T08:43:23.71
ST.DOSS.HHE. ML:2.7 0.0001715 0.44 AML other m 2020-03-25T08:43:27.67
OX.CGRP.HHN. ML:2.5 0.00012654999999999999 0.54 AML other m 2020-03-25T08:43:31.70
OX.CGRP.HHE. ML:2.5 0.00011385 0.42 AML other m 2020-03-25T08:43:48.66
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