Earthquake with magnitude of ML 3.1 on date 23-01-2015 and time 06:56:26 (Italy) in region 1 km SW Castiglione dei Pepoli (BO)

A magnitude ML 3.1 earthquake occured in region: 1 km SW Castiglione dei Pepoli (BO), on

  • 23-01-2015 05:56:26 (UTC)
  • 23-01-2015 06:56:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1360, 11.1510 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Castiglione dei Pepoli BO 1 5648 5648
Camugnano BO 6 1885 7533
Vernio PO 9 6060 13593
Castel di Casio BO 10 3448 17041
San Benedetto Val di Sambro BO 11 4315 21356
Cantagallo PO 12 3105 24461
Sambuca Pistoiese PT 13 1626 26087
Grizzana Morandi BO 13 3916 30003
Alto Reno Terme BO 14 6960 36963
Monghidoro BO 16 3749 40712
Barberino di Mugello FI 17 10836 51548
Vergato BO 17 7639 59187
Gaggio Montano BO 18 4878 64065
Firenzuola FI 18 4726 68791
Monzuno BO 19 6328 75119
Vaiano PO 19 9895 85014
Castel d'Aiano BO 20 1906 86920

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of Prato (191150 inhabitants)
29 Km NE of Pistoia (90315 inhabitants)
42 Km N of Firenze (382808 inhabitants)
42 Km N of Scandicci (50609 inhabitants)
43 Km SW of Bologna (386663 inhabitants)
51 Km W of Imola (69797 inhabitants)
60 Km SE of Modena (184973 inhabitants)
61 Km W of Faenza (58541 inhabitants)
61 Km NE of Lucca (89046 inhabitants)
72 Km W of Forlì (117913 inhabitants)
75 Km SE of Reggio nell'Emilia (171345 inhabitants)
75 Km S of Carpi (70699 inhabitants)
76 Km NE of Pisa (89158 inhabitants)
78 Km E of Viareggio (62467 inhabitants)
81 Km E of Massa (69479 inhabitants)
84 Km E of Carrara (63133 inhabitants)
86 Km SW of Ferrara (133155 inhabitants)
87 Km W of Cesena (96758 inhabitants)
89 Km W of Ravenna (159116 inhabitants)
92 Km N of Siena (53903 inhabitants)
94 Km NE of Livorno (159219 inhabitants)
95 Km NW of Arezzo (99543 inhabitants)
99 Km SE of Parma (192836 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
Bulletin
Rev1000
ML 3.1 2015-01-23
05:56:26
44.1363 11.1508 10 2015-10-19
09:26:59
Bollettino Sismico Italiano INGV 16941091
Reviewed
Rev100
ML 3.1 2015-01-23
05:56:26
44.1427 11.1553 10 2015-01-23
06:06:24
Sala Sismica INGV-Roma 16674301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-01-23 05:56:26 ± 0.11
Latitude 44.1363 ± 0.0072
Longitude 11.1508 ± 0.0063
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 16941091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 753
Semi-minor axis of confidence ellipse (meter) 178
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 355
Circular confidence region, given by single value of horizontal uncertainty (meter) 750.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 31
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 47
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.03687
Epicentral distance of station farthest from the epicenter (degree) 2.59364
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 31
Magnitudes information

ML:3.1

Field Value
Value 3.1
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 16941091
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-10-06 10:14:41

ML:3.1

Field Value
Value 3.1
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 16674301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-01-23 06:06:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SI.ABSI.HHZ. 2015-01-23T05:57:09.72 0.6 undecidable manual P 3 287.8896 38 0.75 12
SI.KOSI.HHZ. 2015-01-23T05:57:07.72 0.6 undecidable manual P 4 258.741 38 2.37 5
SI.LUSI.HHZ. 2015-01-23T05:56:59.80 0.6 undecidable manual P 355 202.8414 38 1.4 17
IV.PLMA.HHZ. 2015-01-23T05:56:56.80 0.6 undecidable manual S 265 103.8183 50 0.03 42
IV.ZOVE.HNE. 2015-01-23T05:56:52.61 0.6 undecidable manual P 10 148.5402 50 1.81 17
IV.TEOL.HHE. 2015-01-23T05:56:51.40 0.3 undecidable manual P 17 142.0467 50 1.6 31
IV.ATVO.HHZ. 2015-01-23T05:56:49.02 0.6 undecidable manual P 129 130.869 50 0.94 30
GU.EQUI.HHZ. 2015-01-23T05:56:49.80 0.3 undecidable manual S 273 79.4649 50 -0.49 59
IV.CSNT.HHZ. 2015-01-23T05:56:49.80 0.6 undecidable manual S 171 74.37 50 0.87 34
IV.NARO.HHZ. 2015-01-23T05:56:49.84 0.6 undecidable manual P 117 128.3715 50 2.15 14
IV.OSSC.HHZ. 2015-01-23T05:56:47.60 0.6 undecidable manual S 174 68.376 50 0.27 42
IV.PII.HHZ. 2015-01-23T05:56:47.20 0.6 undecidable manual S 228 67.8765 50 0 45
IV.CAFI.HHZ. 2015-01-23T05:56:45.79 0.6 positive manual P 144 110.8002 50 0.79 33
MN.VLC.HHZ. 2015-01-23T05:56:45.40 0.3 undecidable manual S 273 60.8946 50 0.07 67
IV.PLMA.HHZ. 2015-01-23T05:56:44.65 0.6 undecidable manual P 265 103.8183 50 0.74 34
GU.MAIM.HHZ. 2015-01-23T05:56:44.40 0.3 undecidable manual S 245 58.0974 50 -0.17 66
GU.CARD.HHZ. 2015-01-23T05:56:43.30 0.3 undecidable manual S 257 54.7008 50 -0.36 64
GU.GRAM.HHZ. 2015-01-23T05:56:42.78 0.6 negative manual P 295 94.7385 50 0.27 40
IV.CRE.HHZ. 2015-01-23T05:56:42.48 0.3 undecidable manual P 132 85.9473 50 1.31 41
IV.BRIS.HHZ. 2015-01-23T05:56:42.00 0.1 undecidable manual S 78 49.9167 50 -0.4 85
IV.BDI.HHZ. 2015-01-23T05:56:40.90 0.3 undecidable manual S 260 45.0216 50 -0.17 68
GU.EQUI.HHZ. 2015-01-23T05:56:40.68 0.3 undecidable manual P 273 79.4649 50 0.51 59
IV.LMD.HHZ. 2015-01-23T05:56:40.10 0.1 undecidable manual S 98 44.8218 50 -0.93 71
IV.RUFI.EHZ. 2015-01-23T05:56:40.70 0.3 undecidable manual S 139 43.7229 50 -0.05 70
IV.CRMI.HHE. 2015-01-23T05:56:39.60 0.3 undecidable manual S 200 40.2264 50 -0.2 68
IV.CSNT.HHZ. 2015-01-23T05:56:39.39 1.0 undecidable manual P 171 74.37 50 0.01 22
IV.ERBM.EHZ. 2015-01-23T05:56:38.78 0.3 undecidable manual P 298 66.4779 50 0.61 58
IV.PII.HHZ. 2015-01-23T05:56:38.25 0.3 undecidable manual P 228 67.8765 50 -0.13 65
IV.OSSC.HHZ. 2015-01-23T05:56:38.42 0.6 negative manual P 174 68.376 50 -0.04 44
GU.CARD.HHZ. 2015-01-23T05:56:37.12 0.6 undecidable manual P 257 54.7008 50 0.78 37
GU.POPM.HHZ. 2015-01-23T05:56:37.60 0.3 undecidable manual S 252 32.9448 50 -0.27 68
IV.ASQU.HHZ. 2015-01-23T05:56:37.98 0.3 undecidable manual P 126 63.3921 50 0.3 64
GU.MAIM.HHZ. 2015-01-23T05:56:36.52 0.3 undecidable manual P 245 58.0974 50 -0.35 64
MN.VLC.HHZ. 2015-01-23T05:56:36.96 0.3 positive manual P 273 60.8946 50 -0.34 64
IV.BRIS.HHZ. 2015-01-23T05:56:35.18 0.3 undecidable manual P 78 49.9167 50 -0.43 64
IV.RUFI.EHZ. 2015-01-23T05:56:34.62 0.3 undecidable manual P 139 43.7229 50 -0.04 70
IV.BDI.HHZ. 2015-01-23T05:56:34.47 0.3 undecidable manual P 260 45.0216 50 -0.38 65
IV.LMD.HHZ. 2015-01-23T05:56:34.47 0.3 undecidable manual P 98 44.8218 50 -0.35 65
IV.CRMI.HHE. 2015-01-23T05:56:33.98 0.3 undecidable manual P 200 40.2264 50 -0.13 69
IV.MTCR.EHZ. 2015-01-23T05:56:33.30 0.3 undecidable manual S 225 16.872 120 0.19 71
GU.POPM.HHZ. 2015-01-23T05:56:32.95 0.1 undecidable manual P 252 32.9448 50 -0.05 95
IV.ZCCA.HHZ. 2015-01-23T05:56:31.96 0.1 undecidable manual P 330 27.5502 50 -0.2 93
IV.MTRZ.HHZ. 2015-01-23T05:56:31.90 0.1 undecidable manual P 48 29.2485 50 -0.53 86
IV.PTF.SHZ. 2015-01-23T05:56:30.25 0.1 undecidable manual P 198 20.5683 116 -0.66 83
IV.MTCR.EHZ. 2015-01-23T05:56:30.56 0.1 undecidable manual P 225 16.872 120 0.31 92
IV.FNVD.HHE. 2015-01-23T05:56:29.60 0.3 undecidable manual S 327 4.0959 157 -0.44 69
IV.FNVD.HHE. 2015-01-23T05:56:28.50 0.1 undecidable manual P 327 4.0959 157 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
SI.ABSI.HHN. ML:3.3 0.0002635 0.62 AML other m 2015-01-23T05:57:55.09
SI.ABSI.HHE. ML:3.2 0.000219 0.74 AML other m 2015-01-23T05:58:09.88
IV.ASQU.HHE. ML:2.6 0.0008449999999999999 0.96 AML other m 2015-01-23T05:56:49.09
IV.ASQU.HHN. ML:2.6 0.0008595 0.6 AML other m 2015-01-23T05:56:49.88
IV.ATVO.HHN. ML:2.7 0.00034250000000000003 0.86 AML other m 2015-01-23T05:57:16.49
IV.ATVO.HHE. ML:2.6 0.00027150000000000004 1.58 AML other m 2015-01-23T05:57:17.16
IV.BDI.HHE. ML:3.4 0.00763 0.36 AML other m 2015-01-23T05:56:41.77
IV.BDI.HNE. ML:3.4 0.007425000000000001 1.46 AML other m 2015-01-23T05:56:41.96
IV.BDI.HHN. ML:3.4 0.007915 0.3 AML other m 2015-01-23T05:56:41.60
IV.BDI.HNN. ML:3.5 0.009434999999999999 0.32 AML other m 2015-01-23T05:56:41.60
IV.BRIS.HHN. ML:2.9 0.0020299999999999997 1.06 AML other m 2015-01-23T05:56:52.35
IV.BRIS.HHE. ML:2.6 0.001145 0.68 AML other m 2015-01-23T05:56:58.37
IV.CAFI.HHN. ML:2.6 0.0003465 1.58 AML other m 2015-01-23T05:57:01.79
IV.CAFI.HHE. ML:2.6 0.000378 0.56 AML other m 2015-01-23T05:57:04.67
GU.CARD.HHN. ML:3.5 0.00713 0.34 AML other m 2015-01-23T05:56:44.42
GU.CARD.HHE. ML:3.3 0.004555 0.72 AML other m 2015-01-23T05:56:45.68
IV.CRE.HHE. ML:2.7 0.000635 0.88 AML other m 2015-01-23T05:56:58.07
IV.CRE.HHN. ML:2.6 0.000576 1.08 AML other m 2015-01-23T05:57:00.76
GU.EQUI.HHN. ML:2.9 0.001145 0.52 AML other m 2015-01-23T05:56:54.31
GU.EQUI.HHE. ML:2.8 0.0009525 0.78 AML other m 2015-01-23T05:56:53.90
IV.ERBM.EHN. ML:3.0 0.00189 1.12 AML other m 2015-01-23T05:56:55.27
IV.ERBM.EHE. ML:2.8 0.0011549999999999998 1 AML other m 2015-01-23T05:56:53.98
GU.GRAM.HHN. ML:3.5 0.0033049999999999998 0.62 AML other m 2015-01-23T05:56:58.50
GU.GRAM.HHE. ML:3.7 0.005535 0.78 AML other m 2015-01-23T05:56:57.86
IV.LMD.HHN. ML:2.7 0.0014500000000000001 0.54 AML other m 2015-01-23T05:56:47.15
IV.LMD.HHE. ML:2.5 0.001045 1.18 AML other m 2015-01-23T05:56:47.71
IV.MTCR.EHN. ML:3.5 0.02525 0.44 AML other m 2015-01-23T05:56:33.73
IV.MTCR.EHE. ML:3.5 0.026850000000000002 0.82 AML other m 2015-01-23T05:56:33.72
IV.MTRZ.HHE. ML:3.2 0.008379999999999999 0.94 AML other m 2015-01-23T05:56:47.36
IV.MTRZ.HNE. ML:3.2 0.008154999999999999 0.94 AML other m 2015-01-23T05:56:47.36
IV.MTRZ.HHN. ML:3.2 0.008919999999999999 0.82 AML other m 2015-01-23T05:56:50.62
IV.MTRZ.HNN. ML:3.2 0.008895 0.82 AML other m 2015-01-23T05:56:50.62
IV.OSSC.HNN. ML:2.9 0.0014 1.18 AML other m 2015-01-23T05:56:58.69
IV.OSSC.HHE. ML:2.9 0.001375 1.14 AML other m 2015-01-23T05:56:58.11
IV.OSSC.HNE. ML:3.0 0.001605 0.86 AML other m 2015-01-23T05:56:51.40
IV.OSSC.HHN. ML:3.0 0.00158 0.9 AML other m 2015-01-23T05:56:51.83
IV.PII.HHE. ML:3.3 0.003645 0.56 AML other m 2015-01-23T05:56:51.39
IV.PII.HHN. ML:3.4 0.004345000000000001 0.84 AML other m 2015-01-23T05:56:49.92
IV.PLMA.HHE. ML:3.0 0.000891 0.56 AML other m 2015-01-23T05:57:00.00
IV.PLMA.HHN. ML:2.9 0.0007650000000000001 1.18 AML other m 2015-01-23T05:56:59.26
GU.POPM.HHN. ML:3.7 0.02175 0.3 AML other m 2015-01-23T05:56:38.58
GU.POPM.HHE. ML:3.4 0.01045 0.48 AML other m 2015-01-23T05:56:38.79
SI.RISI.HHN. ML:3.2 0.0001545 0.44 AML other m 2015-01-23T05:58:05.71
SI.RISI.HHE. ML:3.1 0.00013350000000000002 0.42 AML other m 2015-01-23T05:57:57.40
MN.VLC.HHN. ML:3.2 0.003575 1.04 AML other m 2015-01-23T05:56:46.35
MN.VLC.HNN. ML:3.2 0.0035800000000000003 1.02 AML other m 2015-01-23T05:56:46.87
MN.VLC.HHE. ML:2.9 0.00172 0.82 AML other m 2015-01-23T05:56:47.40
MN.VLC.HNE. ML:2.9 0.001635 0.82 AML other m 2015-01-23T05:56:47.40
IV.ZCCA.HNN. ML:3.2 0.009445 0.42 AML other m 2015-01-23T05:56:39.72
IV.ZCCA.HHN. ML:3.2 0.0096 0.42 AML other m 2015-01-23T05:56:39.72
IV.ZCCA.HHE. ML:3.1 0.0074800000000000005 0.46 AML other m 2015-01-23T05:56:38.53
IV.ZCCA.HNE. ML:3.0 0.006235 1.12 AML other m 2015-01-23T05:56:43.78
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