Earthquake with magnitude of ML 1.7 on date 30-10-2021 and time 00:50:55 (UTC) in region 7 km W Castel del Rio (BO)

A magnitude ML 1.7 earthquake occured in region: 7 km W Castel del Rio (BO), on

  • 30-10-2021 00:50:55 (UTC)
  • 30-10-2021 02:50:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.241, 11.423 at 24 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 7 1246 1246
Monghidoro BO 9 3749 4995
Loiano BO 9 4294 9289
Monterenzio BO 10 6035 15324
Fontanelice BO 11 1943 17267
Monzuno BO 13 6328 23595
Borgo Tossignano BO 14 3288 26883
Firenzuola FI 14 4726 31609
San Benedetto Val di Sambro BO 15 4315 35924
Casola Valsenio RA 16 2617 38541
Casalfiumanese BO 17 3438 41979
Pianoro BO 17 17460 59439
Palazzuolo sul Senio FI 17 1154 60593

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km W of Imola (69797 inhabitants)
29 Km S of Bologna (386663 inhabitants)
37 Km W of Faenza (58541 inhabitants)
48 Km NE of Prato (191150 inhabitants)
49 Km W of Forlì (117913 inhabitants)
53 Km NE of Pistoia (90315 inhabitants)
54 Km N of Firenze (382808 inhabitants)
57 Km NE of Scandicci (50609 inhabitants)
60 Km SE of Modena (184973 inhabitants)
65 Km W of Ravenna (159116 inhabitants)
66 Km W of Cesena (96758 inhabitants)
68 Km S of Ferrara (133155 inhabitants)
74 Km SE of Carpi (70699 inhabitants)
81 Km SE of Reggio nell'Emilia (171345 inhabitants)
86 Km NE of Lucca (89046 inhabitants)
93 Km W of Rimini (147750 inhabitants)
94 Km NW of Arezzo (99543 inhabitants)
97 Km SW of Rovigo (51867 inhabitants)
100 Km NE of Pisa (89158 inhabitants)
Recent and historical seismicity
Seismic hazard
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 1.7 2021-10-30
00:50:55
44.2407 11.4232 24 2021-10-30
00:57:33
Sala Sismica INGV-Roma 97075301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-30 00:50:55 ± 0.34
Latitude 44.2407 ± 0.0117
Longitude 11.4232 ± 0.0151
Depth (km) 24 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97075301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1264
Semi-minor axis of confidence ellipse (meter) 479
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 154
Circular confidence region, given by single value of horizontal uncertainty (meter) 1260
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
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) 0.46
Epicentral distance of station closest to the epicenter (degree) 0.07195
Epicentral distance of station farthest from the epicenter (degree) 0.72845
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 97075301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-30 00:57:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CRMI.HHZ. 2021-10-30T00:51:15.59 0.6 undecidable manual S 216 0.5477 105 0.48 44
IV.ASQU.HHZ. 2021-10-30T00:51:14.77 0.6 undecidable manual S 149 0.5162 106 0.56 43
IV.SFI.EHZ. 2021-10-30T00:51:12.60 0.3 undecidable manual S 138 0.4533 109 0.16 71
IV.RUFI.EHZ. 2021-10-30T00:51:11.03 0.3 undecidable manual S 171 0.4074 111 -0.13 73
IV.CRE.HHZ. 2021-10-30T00:51:10.19 0.1 undecidable manual P 148 0.7285 101 0.14 90
IV.BDI.HNE. 2021-10-30T00:51:08.64 0.3 undecidable manual P 254 0.6196 103 0.42 66
IV.BRIS.HHZ. 2021-10-30T00:51:07.00 0.3 undecidable manual S 94 0.2464 125 0.07 76
IV.CRMI.HHZ. 2021-10-30T00:51:07.74 0.3 undecidable manual P 216 0.5477 105 0.72 60
GU.POPM.HHN. 2021-10-30T00:51:06.40 0.3 undecidable manual P 248 0.5162 106 -0.11 71
IV.ASQU.HHZ. 2021-10-30T00:51:06.31 0.1 undecidable manual P 149 0.5162 106 -0.19 94
IV.FNVD.HHE. 2021-10-30T00:51:05.58 0.6 undecidable manual S 251 0.2275 128 -0.89 39
IV.SFI.EHZ. 2021-10-30T00:51:05.10 0.1 undecidable manual P 138 0.4533 109 -0.38 92
IV.RUFI.EHZ. 2021-10-30T00:51:04.44 0.3 undecidable manual P 171 0.4074 111 -0.3 70
IV.MTRZ.HHZ. 2021-10-30T00:51:04.39 0.3 undecidable manual S 1 0.0719 159 0.71 67
IV.ZCCA.HNE. 2021-10-30T00:51:04.91 0.3 undecidable manual P 289 0.3381 116 1.26 49
IV.IMOL.HNE. 2021-10-30T00:51:02.58 0.3 undecidable manual P 62 0.2572 124 0.13 75
IV.FNVD.HHE. 2021-10-30T00:51:01.09 0.1 undecidable manual P 251 0.2275 128 -0.94 77
IV.BRIS.HHZ. 2021-10-30T00:51:01.78 0.1 positive manual P 94 0.2464 125 -0.52 93
IV.MTRZ.HHZ. 2021-10-30T00:51:00.13 0.1 negative manual P 1 0.0719 159 -0.29 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRZ.HNE. ML:1.9 0.000465 0.62 AML other m 2021-10-30T00:51:04.85
IV.MTRZ.HHE. ML:1.9 0.0004815 0.62 AML other m 2021-10-30T00:51:04.54
IV.MTRZ.HHN. ML:1.8 0.0003835 1.04 AML other m 2021-10-30T00:51:05.42
IV.MTRZ.HNN. ML:1.8 0.0004105 0.74 AML other m 2021-10-30T00:51:07.06
IV.BRIS.HHN. ML:2 0.000358 0.22 AML other m 2021-10-30T00:51:07.58
IV.BRIS.HHE. ML:2 0.000372 0.36 AML other m 2021-10-30T00:51:07.53
IV.SFI.EHN. ML:1.2 3.695E-5 1.52 AML other m 2021-10-30T00:51:12.93
IV.SFI.EHE. ML:1.1 3.07E-5 0.18 AML other m 2021-10-30T00:51:14.13
IV.ASQU.HHN. ML:1.1 2.28E-5 1.08 AML other m 2021-10-30T00:51:15.85
IV.ASQU.HHE. ML:1.2 3.285E-5 0.68 AML other m 2021-10-30T00:51:17.64
IV.FIR.HHE. ML:1.8 0.000126 0.44 AML other m 2021-10-30T00:51:17.34
IV.FIR.HHN. ML:1.8 0.000123 0.56 AML other m 2021-10-30T00:51:19.60
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download