Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 14-10-2021 and time 01:20:57 (Italy) in region 5 km E Monghidoro (BO)

A magnitude ML 1.8 earthquake occured in region: 5 km E Monghidoro (BO), on

  • 13-10-2021 23:20:57 (UTC)
  • 14-10-2021 01:20:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2350, 11.3780 at 13 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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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Monghidoro BO 5 3749 3749
Loiano BO 6 4294 8043
Monzuno BO 10 6328 14371
Castel del Rio BO 10 1246 15617
Monterenzio BO 10 6035 21652
San Benedetto Val di Sambro BO 12 4315 25967
Firenzuola FI 13 4726 30693
Fontanelice BO 15 1943 32636
Pianoro BO 17 17460 50096
Borgo Tossignano BO 18 3288 53384
Marzabotto BO 18 6779 60163
Grizzana Morandi BO 18 3916 64079
Palazzuolo sul Senio FI 19 1154 65233
Casola Valsenio RA 20 2617 67850

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km S of Bologna (386663 inhabitants)
30 Km W of Imola (69797 inhabitants)
41 Km W of Faenza (58541 inhabitants)
45 Km NE of Prato (191150 inhabitants)
50 Km NE of Pistoia (90315 inhabitants)
53 Km N of Firenze (382808 inhabitants)
53 Km W of Forlì (117913 inhabitants)
55 Km N of Scandicci (50609 inhabitants)
58 Km SE of Modena (184973 inhabitants)
69 Km W of Ravenna (159116 inhabitants)
70 Km S of Ferrara (133155 inhabitants)
70 Km W of Cesena (96758 inhabitants)
72 Km SE of Carpi (70699 inhabitants)
79 Km SE of Reggio nell'Emilia (171345 inhabitants)
82 Km NE of Lucca (89046 inhabitants)
95 Km NW of Arezzo (99543 inhabitants)
97 Km W of Rimini (147750 inhabitants)
97 Km NE of Pisa (89158 inhabitants)
99 Km SW of Rovigo (51867 inhabitants)
99 Km E of Viareggio (62467 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.8 2021-10-13
23:20:57		 44.2353 11.378 13 2022-03-30
13:04:28		 Bollettino Sismico Italiano INGV 99551821
Reviewed
Rev100 		ML 1.8 2021-10-13
23:20:57		 44.2265 11.3737 18 2021-10-13
23:28:47		 Sala Sismica INGV-Roma 96519271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-13 23:20:57 ± 0.17
Latitude 44.2353 ± 0.0099
Longitude 11.3780 ± 0.0126
Depth (km) 13 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99551821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1132
Semi-minor axis of confidence ellipse (meter) 464
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 348
Circular confidence region, given by single value of horizontal uncertainty (meter) 1130.0
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 28
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.70147
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96519271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-13 23:28:47

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 99551821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-10 18:05:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SNTG.HHZ. 2021-10-13T23:21:46.70 3.0 undecidable manual Sg 3.4 0
IV.EL6.EHZ. 2021-10-13T23:21:24.85 3.0 undecidable manual Pn 1.06 0
IV.MURB.HHZ. 2021-10-13T23:21:20.04 3.0 undecidable manual P -0.12 0
IV.SFI.EHZ. 2021-10-13T23:21:14.64 3.0 undecidable manual S 0.65 0
IV.RUFI.EHE. 2021-10-13T23:21:12.62 0.6 undecidable manual S 167 45.3213 94 0.13 48
GU.SARM.EHN. 2021-10-13T23:21:12.08 0.3 undecidable manual P 266 77.8665 92 0.73 58
GU.GSCL.HHN. 2021-10-13T23:21:10.20 0.3 undecidable manual P 282 63.9915 93 1 53
IV.BRIS.HHZ. 2021-10-13T23:21:09.46 0.6 undecidable manual S 92 30.9468 97 0.8 40
IV.BDI.HNZ. 2021-10-13T23:21:09.65 0.3 undecidable manual P 253 65.1903 92 0.27 68
IV.MOCL.EHZ. 2021-10-13T23:21:08.47 0.6 undecidable manual S 212 30.0477 98 0.05 51
IV.ZCCA.HHZ. 2021-10-13T23:21:08.64 0.6 undecidable manual S 292 34.3434 96 -0.93 37
GU.POPM.HHZ. 2021-10-13T23:21:08.23 0.6 undecidable manual P 247 53.8017 93 0.6 43
IV.CRMI.HNN. 2021-10-13T23:21:08.59 0.3 undecidable manual P 213 58.1973 93 0.28 69
IV.ASQU.HHZ. 2021-10-13T23:21:07.98 3.0 undecidable manual P 0.01 0
IV.FNVD.HHZ. 2021-10-13T23:21:06.05 0.6 undecidable manual S 250 21.6672 104 -0.17 49
IV.SFI.EHZ. 2021-10-13T23:21:06.86 3.0 undecidable manual P -0.17 0
IV.RUFI.EHE. 2021-10-13T23:21:06.27 0.3 undecidable manual P 167 45.3213 94 -0.05 73
IV.SEI.HHZ. 2021-10-13T23:21:06.20 0.6 undecidable manual S 184 20.1687 106 0.37 48
IV.FIU.EHE. 2021-10-13T23:21:06.78 0.6 undecidable manual P 11 45.8208 94 0.38 46
IV.MPPT.EHN. 2021-10-13T23:21:05.36 0.3 undecidable manual P 217 38.4282 95 0.09 74
IV.ZCCA.HHZ. 2021-10-13T23:21:04.40 0.3 undecidable manual P 292 34.3434 96 -0.25 71
IV.IMOL.EHZ. 2021-10-13T23:21:03.95 0.6 undecidable manual P 64 32.0457 97 -0.34 47
IV.MOCL.EHZ. 2021-10-13T23:21:03.53 0.1 undecidable manual P 212 30.0477 98 -0.45 92
IV.VISG.HHZ. 2021-10-13T23:21:03.43 0.6 undecidable manual S 139 6.7932 146 0.53 47
IV.BRIS.HHZ. 2021-10-13T23:21:03.76 0.1 positive manual P 92 30.9468 97 -0.36 95
IV.SEI.HHZ. 2021-10-13T23:21:02.13 0.1 undecidable manual P 184 20.1687 106 -0.36 96
IV.FNVD.HHZ. 2021-10-13T23:21:02.13 0.1 undecidable manual P 250 21.6672 104 -0.58 89
IV.VISG.HHZ. 2021-10-13T23:21:00.53 0.1 positive manual P 139 6.7932 146 -0.26 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHN. ML:1.8 0.00076 0.42 AML other m 2021-10-13T23:21:03.52
IV.VISG.HHE. ML:1.9 0.000866 0.34 AML other m 2021-10-13T23:21:03.63
IV.SEI.HHE. ML:2.3 0.0014550000000000001 0.4 AML other m 2021-10-13T23:21:06.55
IV.SEI.HHN. ML:2.6 0.003 0.22 AML other m 2021-10-13T23:21:06.87
IV.FNVD.HHE. ML:1.8 0.0003935 0.24 AML other m 2021-10-13T23:21:07.39
IV.FNVD.HHN. ML:1.9 0.0005215 0.1 AML other m 2021-10-13T23:21:07.47
IV.BRIS.HHN. ML:1.9 0.00036199999999999996 0.3 AML other m 2021-10-13T23:21:10.49
IV.BRIS.HHE. ML:1.8 0.0003095 1.26 AML other m 2021-10-13T23:21:13.89
IV.SFI.EHN. ML:1.6 0.00008725 1.62 AML other m 2021-10-13T23:21:17.09
IV.ASQU.HHE. ML:1.6 0.00009015 0.24 AML other m 2021-10-13T23:21:17.66
IV.SFI.EHE. ML:1.5 0.00008215 0.36 AML other m 2021-10-13T23:21:18.81
IV.ASQU.HHN. ML:1.5 0.00006809999999999999 0.74 AML other m 2021-10-13T23:21:19.16
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