Earthquake with magnitude of ML 2.0 on date 21-10-2021 and time 13:00:17 (UTC) in region 6 km W Castel del Rio (BO)

A magnitude ML 2.0 earthquake occured in region: 6 km W Castel del Rio (BO), on

  • 21-10-2021 13:00:17 (UTC)
  • 21-10-2021 15:00:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.224, 11.427 at 16 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
Castel del Rio BO 6 1246 1246
Monghidoro BO 9 3749 4995
Loiano BO 10 4294 9289
Fontanelice BO 11 1943 11232
Monterenzio BO 12 6035 17267
Firenzuola FI 12 4726 21993
Monzuno BO 14 6328 28321
Borgo Tossignano BO 14 3288 31609
San Benedetto Val di Sambro BO 15 4315 35924
Casola Valsenio RA 16 2617 38541
Palazzuolo sul Senio FI 16 1154 39695
Casalfiumanese BO 17 3438 43133
Pianoro BO 19 17460 60593

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Imola (69797 inhabitants)
31 Km S of Bologna (386663 inhabitants)
37 Km W of Faenza (58541 inhabitants)
46 Km NE of Prato (191150 inhabitants)
49 Km W of Forlì (117913 inhabitants)
52 Km NE of Pistoia (90315 inhabitants)
52 Km N of Firenze (382808 inhabitants)
55 Km NE of Scandicci (50609 inhabitants)
62 Km SE of Modena (184973 inhabitants)
65 Km W of Ravenna (159116 inhabitants)
66 Km W of Cesena (96758 inhabitants)
70 Km S of Ferrara (133155 inhabitants)
76 Km SE of Carpi (70699 inhabitants)
82 Km SE of Reggio nell'Emilia (171345 inhabitants)
85 Km E of Lucca (89046 inhabitants)
92 Km NW of Arezzo (99543 inhabitants)
93 Km W of Rimini (147750 inhabitants)
99 Km SW of Rovigo (51867 inhabitants)
100 Km NE of Pisa (89158 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
Reviewed
Rev100
ML 2.0 2021-10-21
13:00:17
44.2243 11.4272 16 2021-10-21
13:23:08
Sala Sismica INGV-Roma 96847011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-21 13:00:17 ± 0.17
Latitude 44.2243 ± 0.0135
Longitude 11.4272 ± 0.0125
Depth (km) 16 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96847011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1106
Semi-minor axis of confidence ellipse (meter) 1082
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 11
Circular confidence region, given by single value of horizontal uncertainty (meter) 1110
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 27
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
Epicentral distance of station farthest from the epicenter (degree) 1.64936
Number of stations at which the event was observed 39
Number of stations from which data was used for origin computation 20
Magnitude information

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 96847011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-21 13:23:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SENA.HHZ. 2021-10-21T13:02:17.32 3.0 undecidable manual Sg 11.71 0
IV.FERC.HHZ.00 2021-10-21T13:02:16.40 3.0 positive manual Pg 20.84 0
IX.RSF3.HHZ.02 2021-10-21T13:02:10.15 3.0 undecidable manual Sn -1.16 0
IV.GIZZ.HHZ. 2021-10-21T13:02:06.19 3.0 positive manual Pg 16.34 0
IV.PAOL.HHZ. 2021-10-21T13:02:05.73 3.0 undecidable manual Sn 2.55 0
IV.SGG.HHZ. 2021-10-21T13:01:56.25 3.0 undecidable manual Sn 2.13 0
IV.RESU.HHZ. 2021-10-21T13:01:56.01 3.0 negative manual Pn -0.85 0
IV.RNI2.HHZ. 2021-10-21T13:01:52.12 3.0 undecidable manual Sg 6.67 0
IV.LAV9.HHZ. 2021-10-21T13:01:34.13 3.0 undecidable manual Sn 1.2 0
IV.VBKN.HHZ. 2021-10-21T13:01:31.82 3.0 positive manual Pg 13.5 0
OT.OT17.EHZ. 2021-10-21T13:01:30.74 3.0 positive manual Pg 15.16 0
IV.SGRT.HHZ. 2021-10-21T13:01:29.71 3.0 undecidable manual Pg 11.81 0
IX.COL3.HHZ.02 2021-10-21T13:01:27.75 3.0 undecidable manual Pn 2.38 0
IT.PLTA.HNZ. 2021-10-21T13:01:10.12 3.0 undecidable manual Pn 0.76 0
IV.EL6.EHZ. 2021-10-21T13:01:08.24 3.0 undecidable manual Sg 4.43 0
SI.ROSI.HHZ. 2021-10-21T13:01:05.11 3.0 positive manual Pg 4.57 0
IV.RCAV.EHZ. 2021-10-21T13:00:56.38 3.0 undecidable manual Pn -2.27 0
IV.MAGA.HHZ. 2021-10-21T13:00:47.29 0.3 undecidable manual P 340 1.6494 54 0.75 42
IV.PP3.EHZ. 2021-10-21T13:00:46.03 3.0 positive manual Pn -1.41 0
IV.MPAG.EHZ. 2021-10-21T13:00:38.40 3.0 undecidable manual P 0.05 0
IV.ASQU.HHZ. 2021-10-21T13:00:35.52 0.3 undecidable manual S 149 0.5 96 0.6 63
IV.CAFI.HHZ. 2021-10-21T13:00:35.95 0.3 undecidable manual P 156 0.9758 93 0.26 62
IV.SFI.EHZ. 2021-10-21T13:00:33.73 0.3 undecidable manual S 137 0.4389 98 0.62 64
IV.PII.HHZ. 2021-10-21T13:00:33.20 0.3 undecidable manual P 233 0.8202 94 0.16 65
IV.CSNT.HHZ. 2021-10-21T13:00:32.63 0.3 undecidable manual P 188 0.7572 94 0.67 58
IV.OSSC.HHZ. 2021-10-21T13:00:31.51 0.1 undecidable manual P 191 0.7123 94 0.32 86
IV.CRE.HHZ. 2021-10-21T13:00:31.24 0.1 undecidable manual P 148 0.7132 94 0.03 92
IV.MPPT.EHZ. 2021-10-21T13:00:30.98 0.3 undecidable manual S 222 0.3597 100 0.18 71
IV.CRMI.HHZ. 2021-10-21T13:00:28.12 0.6 undecidable manual P 217 0.536 96 -0.06 48
IV.BRIS.HHZ. 2021-10-21T13:00:28.06 0.3 undecidable manual S 90 0.2428 108 0.63 67
IV.BDI.HHZ. 2021-10-21T13:00:27.95 0.6 undecidable manual P 255 0.6178 95 -1.63 25
GU.POPM.HHN. 2021-10-21T13:00:27.96 0.3 undecidable manual P 250 0.5135 96 0.16 69
IV.LMD.HHE. 2021-10-21T13:00:27.71 0.3 undecidable manual S 126 0.2491 107 0.12 75
IV.ASQU.HHZ. 2021-10-21T13:00:27.12 0.3 undecidable manual P 149 0.5 96 -0.46 66
IV.SEI.HHZ. 2021-10-21T13:00:26.13 0.3 undecidable manual S 196 0.1772 117 0.52 68
IV.ZCCA.HNE. 2021-10-21T13:00:25.97 0.1 undecidable manual P 292 0.3462 101 0.99 72
IV.RUFI.EHZ. 2021-10-21T13:00:25.41 0.3 undecidable manual P 171 0.3903 99 -0.31 70
IV.SFI.EHZ. 2021-10-21T13:00:25.96 0.1 undecidable manual P 137 0.4389 98 -0.58 85
IV.MPPT.EHZ. 2021-10-21T13:00:24.51 0.1 undecidable manual P 222 0.3597 100 -0.69 84
IV.IMOL.EHZ. 2021-10-21T13:00:23.39 0.3 undecidable manual P 59 0.2626 106 -0.19 73
IV.VISG.HHZ. 2021-10-21T13:00:23.31 0.3 undecidable manual S 172 0.036 163 0.47 71
IV.MOCL.EHZ. 2021-10-21T13:00:23.24 0.1 undecidable manual P 219 0.2815 104 -0.65 87
IV.LMD.HHE. 2021-10-21T13:00:22.64 0.3 undecidable manual P 126 0.2491 107 -0.71 63
IV.BRIS.HHZ. 2021-10-21T13:00:22.80 0.1 undecidable manual P 90 0.2428 108 -0.46 92
IV.SEI.HHZ. 2021-10-21T13:00:21.84 0.1 undecidable manual P 196 0.1772 117 -0.37 96
IV.VISG.HHZ. 2021-10-21T13:00:20.30 0.1 undecidable manual P 172 0.036 163 -0.31 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHN. ML:2.2 0.001885 0.8 AML other m 2021-10-21T13:00:26.46
IV.VISG.HHE. ML:2.3 0.001965 0.68 AML other m 2021-10-21T13:00:26.43
IV.BRIS.HHN. ML:2.5 0.001545 0.24 AML other m 2021-10-21T13:00:28.61
IV.SEI.HHE. ML:2.3 0.001295 0.42 AML other m 2021-10-21T13:00:30.40
IV.SEI.HHN. ML:2.6 0.00243 0.44 AML other m 2021-10-21T13:00:31.31
IV.BRIS.HHE. ML:2.5 0.0014 0.68 AML other m 2021-10-21T13:00:31.15
IV.MOCL.EHN. ML:1.7 0.000196 1.08 AML other m 2021-10-21T13:00:32.37
IV.MOCL.EHE. ML:1.9 0.000356 0.46 AML other m 2021-10-21T13:00:32.97
IV.RUFI.EHE. ML:1.8 0.000168 1 AML other m 2021-10-21T13:00:33.32
IV.RUFI.EHN. ML:1.8 0.0001855 0.96 AML other m 2021-10-21T13:00:33.39
IV.IMOL.HNN. ML:2.4 0.001294 1.12 AML other m 2021-10-21T13:00:34.23
IV.MPPT.EHN. ML:1.6 0.000147 0.48 AML other m 2021-10-21T13:00:34.50
IV.IMOL.HNE. ML:2.6 0.001615 0.22 AML other m 2021-10-21T13:00:35.37
IV.SFI.EHE. ML:1.9 0.0002065 0.58 AML other m 2021-10-21T13:00:37.66
IV.ASQU.HHN. ML:1.9 0.000165 0.26 AML other m 2021-10-21T13:00:38.87
IV.MPPT.EHE. ML:1.5 9.75E-5 0.66 AML other m 2021-10-21T13:00:39.92
IV.ASQU.HHE. ML:1.8 0.000151 0.92 AML other m 2021-10-21T13:00:39.80
IV.SFI.EHN. ML:2 0.0002325 0.58 AML other m 2021-10-21T13:00:40.80
IV.MPAG.EHN. ML:1.9 5.065E-5 0.7 AML other m 2021-10-21T13:00:43.43
IV.BDI.HHN. ML:1.9 0.0001415 1.16 AML other m 2021-10-21T13:00:44.31
IV.BDI.HHE. ML:2 0.00018 0.42 AML other m 2021-10-21T13:00:45.03
IV.VOBA.EHN. ML:2.6 0.0001705 0.1 AML other m 2021-10-21T13:00:45.06
IV.OSSC.HHE. ML:2.1 0.0001795 1.6 AML other m 2021-10-21T13:00:46.15
IV.CSNT.HHN. ML:1.9 9.415E-5 0.42 AML other m 2021-10-21T13:00:46.44
IV.VOBA.EHE. ML:2.6 0.0001525 1.42 AML other m 2021-10-21T13:00:46.22
IV.CSNT.HHE. ML:1.9 0.0001017 0.84 AML other m 2021-10-21T13:00:47.48
IV.OSSC.HHN. ML:1.9 0.0001215 0.48 AML other m 2021-10-21T13:00:48.60
IV.CRE.HHE. ML:1.7 7.445E-5 0.94 AML other m 2021-10-21T13:00:51.73
IV.CRE.HHN. ML:1.9 0.000119 1.14 AML other m 2021-10-21T13:00:51.30
IV.MILN.HNN. ML:3.6 0.0010345 0.4 AML other m 2021-10-21T13:00:55.60
IV.CAFI.HHE. ML:2 7.845E-5 0.64 AML other m 2021-10-21T13:00:55.78
IV.CAFI.HHN. ML:1.8 5.265E-5 0.84 AML other m 2021-10-21T13:00:55.37
IV.MILN.HNE. ML:3.9 0.00217 0.52 AML other m 2021-10-21T13:00:55.59
IV.MPAG.EHE. ML:0 5.595E-5 1.04 AML other m 2021-10-21T13:01:00.17
IV.MAGA.HHN. ML:0 0.0001465 0.48 AML other m 2021-10-21T13:01:14.65
IV.MAGA.HHE. ML:0 0.0002095 0.56 AML other m 2021-10-21T13:01:16.61
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, http://terremoti.ingv.it/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