Sala Sismica

Earthquake with magnitude of ML 2.1 on date 17-07-2017 and time 03:49:49 (Italy) in region 3 km NW Castiglione dei Pepoli (BO)

A magnitude ML 2.1 earthquake occured in region: 3 km NW Castiglione dei Pepoli (BO), on

  • 17-07-2017 01:49:49 (UTC)
  • 17-07-2017 03:49:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.16, 11.12 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 3 5648 5648
Camugnano BO 3 1885 7533
Castel di Casio BO 7 3448 10981
San Benedetto Val di Sambro BO 11 4315 15296
Grizzana Morandi BO 11 3916 19212
Sambuca Pistoiese PT 12 1626 20838
Vernio PO 12 6060 26898
Alto Reno Terme BO 12 6960 33858
Cantagallo PO 14 3105 36963
Vergato BO 14 7639 44602
Gaggio Montano BO 16 4878 49480
Monghidoro BO 17 3749 53229
Castel d'Aiano BO 17 1906 55135
Monzuno BO 18 6328 61463
Lizzano in Belvedere BO 18 2212 63675
Montese MO 19 3353 67028
Barberino di Mugello FI 20 10836 77864

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NE of Pistoia (90315 inhabitants)
31 Km N of Prato (191150 inhabitants)
41 Km SW of Bologna (386663 inhabitants)
44 Km N of Firenze (382808 inhabitants)
44 Km N of Scandicci (50609 inhabitants)
52 Km W of Imola (69797 inhabitants)
57 Km S of Modena (184973 inhabitants)
61 Km NE of Lucca (89046 inhabitants)
62 Km W of Faenza (58541 inhabitants)
72 Km SE of Reggio nell'Emilia (171345 inhabitants)
72 Km S of Carpi (70699 inhabitants)
73 Km W of Forlì (117913 inhabitants)
76 Km NE of Pisa (89158 inhabitants)
77 Km E of Viareggio (62467 inhabitants)
80 Km E of Massa (69479 inhabitants)
83 Km E of Carrara (63133 inhabitants)
85 Km SW of Ferrara (133155 inhabitants)
89 Km W of Cesena (96758 inhabitants)
90 Km W of Ravenna (159116 inhabitants)
94 Km NE of Livorno (159219 inhabitants)
95 Km N of Siena (53903 inhabitants)
96 Km SE of Parma (192836 inhabitants)
98 Km NW of Arezzo (99543 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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 ( 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.
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire ( that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Date and Time (UTC) Latitude Longitude Magnitude Depth (km) Author Location ID
Rev 100 2017-07-17
44.16 11.13 ML 2.1 11 Sala Sismica INGV-Roma 47968201
Best location and best magnitude until now.
Origin information


Field Value
Time (UTC) 2017-07-17 01:49:49 ± 0.08
Latitude 44.16 ± 0.00
Longitude 11.13 ± 0.01
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 47968201


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 403
Semi-minor axis of confidence ellipse (meter) 335
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 168
Circular confidence region, given by single value of horizontal uncertainty (meter) 400
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.69338
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 22
Magnitude information


Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 54
Type of magnitude ML
Reference to an origin 47968201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-07-17 02:00:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
CH.MUGIO.HHZ. 2017-07-17T01:50:32.27 3.0 undecidable manual Pg 5.39 0
IV.TERO.HHZ. 2017-07-17T01:50:32.63 3.0 undecidable manual Pg 4.72 0
IV.MAGA.HHZ. 2017-07-17T01:50:20.14 3.0 undecidable manual Pg 2.05 0
ST.DOSS.HHZ. 2017-07-17T01:50:18.46 3.0 undecidable manual Pn -0.6 0
IV.CSNT.HHZ. 2017-07-17T01:50:03.14 0.3 undecidable manual P 170 0.6934 50 0.5 61
IV.OSSC.HHZ. 2017-07-17T01:50:02.44 0.1 undecidable manual P 172 0.6385 50 0.74 75
IV.PII.HHZ. 2017-07-17T01:50:01.35 0.1 undecidable manual P 225 0.6124 50 0.09 90
IV.CAFI.HHZ. 2017-07-17T01:50:09.76 3.0 positive manual P 0.31 0
IV.GROG.HHZ. 2017-07-17T01:50:08.20 3.0 undecidable manual P -2.81 0
MN.VLC.HHZ. 2017-07-17T01:49:59.61 0.1 undecidable manual P 271 0.5297 50 -0.23 89
IV.PLMA.HHZ. 2017-07-17T01:50:07.89 3.0 positive manual P 0.6 0
GU.MAIM.HHZ. 2017-07-17T01:49:59.68 0.1 undecidable manual P 242 0.5162 50 0.08 92
GU.SARM.EHZ. 2017-07-17T01:49:59.24 0.1 undecidable manual P 273 0.5198 50 -0.44 85
IV.BRIS.HHZ. 2017-07-17T01:49:58.32 0.1 undecidable manual P 81 0.4641 50 -0.41 87
IV.IMOL.EHZ. 2017-07-17T01:49:59.04 0.3 undecidable manual P 65 0.4856 50 -0.05 70
GU.EQUI.HHZ. 2017-07-17T01:50:06.04 3.0 undecidable manual P 2.86 0
GU.GSCL.HHZ. 2017-07-17T01:49:57.70 0.1 undecidable manual P 297 0.4308 50 -0.44 87
GU.CARD.HHZ. 2017-07-17T01:49:59.11 0.1 undecidable manual P 254 0.4802 50 0.12 92
IV.LMD.HHZ. 2017-07-17T01:49:58.30 0.3 undecidable manual P 101 0.4254 50 0.25 68
IV.RUFI.EHZ. 2017-07-17T01:49:57.61 0.1 undecidable manual P 139 0.4218 50 -0.38 88
IV.BDI.HHZ. 2017-07-17T01:49:56.82 0.1 undecidable manual P 256 0.3912 50 -0.66 81
IV.CRMI.HHZ. 2017-07-17T01:49:57.01 0.1 undecidable manual P 196 0.3759 50 -0.2 93
IV.RAVA.EHZ. 2017-07-17T01:50:01.28 0.1 undecidable manual P 360 0.5989 50 0.25 87
GU.POPM.HHZ. 2017-07-17T01:49:55.27 0.1 undecidable manual P 247 0.2869 50 -0.42 90
IV.ZCCA.HHZ. 2017-07-17T01:49:54.38 0.1 undecidable manual P 331 0.2212 50 -0.19 96
IV.MTRZ.HHZ. 2017-07-17T01:49:55.02 0.1 undecidable manual P 54 0.2653 50 -0.3 93
IV.MPPT.EHZ. 2017-07-17T01:49:54.00 0.1 undecidable manual P 187 0.2005 50 -0.21 96
IV.MOCL.EHZ. 2017-07-17T01:49:53.25 0.1 undecidable manual P 165 0.1565 121 -0.1 99
IV.MTCR.EHZ. 2017-07-17T01:49:53.41 0.1 undecidable manual P 215 0.1556 121 0.08 99
IV.FNVD.HHZ. 2017-07-17T01:49:51.23 0.1 undecidable manual P 351 0.0117 173 -0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FNVD.HHN. ML:3.2 0.0305 0.36 AML other m 2017-07-17T01:49:53.27
IV.FNVD.HHE. ML:2.9 0.01334 0.08 AML other m 2017-07-17T01:49:53.41
IV.MOCL.EHE. ML:2.5 0.00259 0.34 AML other m 2017-07-17T01:49:56.88
IV.MTCR.EHN. ML:2.6 0.00361 0.16 AML other m 2017-07-17T01:49:56.93
IV.MTCR.EHE. ML:2.7 0.004065 1.14 AML other m 2017-07-17T01:49:56.89
IV.MOCL.EHN. ML:2.6 0.003145 1.86 AML other m 2017-07-17T01:49:56.98
IV.MPPT.EHN. ML:2.5 0.002005 0.58 AML other m 2017-07-17T01:49:58.44
IV.MPPT.EHE. ML:2.3 0.00149 0.64 AML other m 2017-07-17T01:49:58.33
IV.ZCCA.HHN. ML:2 0.000579 1.6 AML other m 2017-07-17T01:49:59.84
IV.ZCCA.HNN. ML:1.9 0.000528 0.86 AML other m 2017-07-17T01:49:59.84
IV.ZCCA.HNE. ML:2 0.00066 0.98 AML other m 2017-07-17T01:50:00.57
IV.ZCCA.HHE. ML:2 0.000615 0.98 AML other m 2017-07-17T01:50:00.57
GU.POPM.HHN. ML:2.3 0.000955 0.16 AML other m 2017-07-17T01:50:00.57
GU.POPM.HHE. ML:2.3 0.000962 1.42 AML other m 2017-07-17T01:50:01.77
IV.MTRZ.HNE. ML:2.3 0.001014 0.3 AML other m 2017-07-17T01:50:03.37
IV.MTRZ.HHE. ML:2.3 0.001084 0.3 AML other m 2017-07-17T01:50:03.37
IV.MTRZ.HNN. ML:2.3 0.001095 1.22 AML other m 2017-07-17T01:50:03.32
IV.MTRZ.HHN. ML:2.4 0.00113 1.22 AML other m 2017-07-17T01:50:03.32
IV.CRMI.HHN. ML:1.6 0.0001405 1.72 AML other m 2017-07-17T01:50:04.06
IV.CRMI.HHE. ML:1.9 0.0002585 0.24 AML other m 2017-07-17T01:50:04.11
IV.BDI.HNE. ML:1.8 0.0002165 0.84 AML other m 2017-07-17T01:50:05.05
IV.BDI.HNN. ML:2 0.0003085 1.52 AML other m 2017-07-17T01:50:05.91
IV.BDI.HHN. ML:1.5 9.58E-5 1.58 AML other m 2017-07-17T01:50:05.94
GU.GSCL.HHE. ML:1.8 0.0001525 1.04 AML other m 2017-07-17T01:50:06.93
GU.CARD.HHN. ML:2.1 0.0002875 1.14 AML other m 2017-07-17T01:50:06.30
GU.GSCL.HHN. ML:1.9 0.00022 0.26 AML other m 2017-07-17T01:50:07.30
IV.BRIS.HHN. ML:2 0.000258 0.54 AML other m 2017-07-17T01:50:07.65
IV.BRIS.HHE. ML:2.1 0.000291 0.38 AML other m 2017-07-17T01:50:07.67
IV.LMD.HHN. ML:1.8 0.0001625 0.54 AML other m 2017-07-17T01:50:08.37
GU.CARD.HHE. ML:1.9 0.000182 0.6 AML other m 2017-07-17T01:50:08.56
IV.BDI.HHE. ML:1.5 0.0001003 0.86 AML other m 2017-07-17T01:50:08.93
MN.VLC.HHN. ML:7.2 35.15 1.18 AML other m 2017-07-17T01:50:08.97
GU.SARM.EHN. ML:2.2 0.0003205 0.54 AML other m 2017-07-17T01:50:09.12
GU.MAIM.HHN. ML:2 0.000239 0.4 AML other m 2017-07-17T01:50:10.16
IV.LMD.HHE. ML:1.6 0.0001215 0.84 AML other m 2017-07-17T01:50:11.91
GU.MAIM.HHE. ML:1.7 0.000113 0.52 AML other m 2017-07-17T01:50:11.57
IV.PII.HHE. ML:2.5 0.000543 0.34 AML other m 2017-07-17T01:50:12.49
IV.PII.HHN. ML:2.5 0.0005505 0.34 AML other m 2017-07-17T01:50:12.67
MN.VLC.HHE. ML:7.2 29.85 0.74 AML other m 2017-07-17T01:50:13.18
GU.SARM.EHE. ML:2.1 0.000258 0.46 AML other m 2017-07-17T01:50:13.19
IV.CSNT.HHE. ML:1.9 0.000117 0.42 AML other m 2017-07-17T01:50:15.32
IV.PLMA.HHE. ML:1.9 7.48E-5 0.7 AML other m 2017-07-17T01:50:15.27
IV.RAVA.EHE. ML:2.1 0.0002195 0.74 AML other m 2017-07-17T01:50:15.62
IV.CSNT.HHN. ML:2.1 0.0001795 0.54 AML other m 2017-07-17T01:50:17.59
IV.OSSC.HHE. ML:2 0.000153 0.56 AML other m 2017-07-17T01:50:17.84
IV.RAVA.EHN. ML:2.2 0.0003225 1.24 AML other m 2017-07-17T01:50:18.64
IV.OSSC.HHN. ML:1.9 0.000142 0.54 AML other m 2017-07-17T01:50:18.73
IV.PLMA.HHN. ML:1.8 6.145E-5 0.88 AML other m 2017-07-17T01:50:19.26
IV.CAFI.HHN. ML:1.6 2.885E-5 0.62 AML other m 2017-07-17T01:50:24.83
IV.CAFI.HHE. ML:1.6 3.705E-5 1.48 AML other m 2017-07-17T01:50:30.17
IV.MAGA.HHE. ML:2.3 7.705E-5 0.44 AML other m 2017-07-17T01:50:45.18
IV.MAGA.HHN. ML:2.2 4.8E-5 0.52 AML other m 2017-07-17T01:50:46.36
ST.DOSS.HHN. ML:2 3.74E-5 1.52 AML other m 2017-07-17T01:50:46.00
ST.DOSS.HHE. ML:2 2.81E-5 0.68 AML other m 2017-07-17T01:50:55.76
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in full SEED format Download