Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 22-09-2021 and time 13:16:32 (UTC) in region 5 km S Castel del Rio (BO)

A magnitude ML 1.4 earthquake occured in region: 5 km S Castel del Rio (BO), on

  • 22-09-2021 13:16:32 (UTC)
  • 22-09-2021 15:16:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1660, 11.5180 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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
Palazzuolo sul Senio FI 6 1154 2400
Casola Valsenio RA 11 2617 5017
Fontanelice BO 11 1943 6960
Firenzuola FI 12 4726 11686
Marradi FI 13 3139 14825
Borgo Tossignano BO 14 3288 18113
Casalfiumanese BO 17 3438 21551
Monghidoro BO 17 3749 25300
Loiano BO 20 4294 29594
Monterenzio BO 20 6035 35629

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SW of Imola (69797 inhabitants)
32 Km W of Faenza (58541 inhabitants)
39 Km SE of Bologna (386663 inhabitants)
42 Km W of Forlì (117913 inhabitants)
46 Km NE of Prato (191150 inhabitants)
49 Km NE of Firenze (382808 inhabitants)
53 Km NE of Scandicci (50609 inhabitants)
54 Km E of Pistoia (90315 inhabitants)
58 Km W of Cesena (96758 inhabitants)
61 Km W of Ravenna (159116 inhabitants)
71 Km SE of Modena (184973 inhabitants)
75 Km S of Ferrara (133155 inhabitants)
83 Km NW of Arezzo (99543 inhabitants)
85 Km W of Rimini (147750 inhabitants)
85 Km SE of Carpi (70699 inhabitants)
89 Km E of Lucca (89046 inhabitants)
92 Km SE of Reggio nell'Emilia (171345 inhabitants)
95 Km N of Siena (53903 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 1.4 2021-09-22
13:16:32		 44.1658 11.5178 10 2022-03-30
13:04:12		 Bollettino Sismico Italiano INGV 96854691
Reviewed
Rev100 		ML 1.4 2021-09-22
13:16:32		 44.1625 11.5145 10 2021-09-22
13:24:30		 Sala Sismica INGV-Roma 95742331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-22 13:16:32 ± 0.07
Latitude 44.1658 ± 0.0054
Longitude 11.5178 ± 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 96854691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 557
Semi-minor axis of confidence ellipse (meter) 479
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 8
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.06385
Epicentral distance of station farthest from the epicenter (degree) 0.53600
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 18
Type of magnitude ML
Reference to an origin 95742331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-22 13:24:30

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 96854691
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-21 19:46:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RUFI.EHZ. 2021-09-22T13:16:45.22 0.6 undecidable manual S 181 36.3414 50 0.09 48
IV.MOCL.EHZ. 2021-09-22T13:16:44.39 0.6 undecidable manual S 237 32.2455 50 0.37 45
IV.CRMI.HHZ. 2021-09-22T13:16:44.16 1.0 undecidable manual P 226 59.496 50 0.69 19
IV.BOSL.HHZ. 2021-09-22T13:16:43.35 0.6 undecidable manual S 204 28.4493 50 0.34 46
IV.FNVD.HHZ. 2021-09-22T13:16:43.95 0.6 undecidable manual S 271 31.4463 50 0.14 48
IV.ASQU.HHZ. 2021-09-22T13:16:41.29 0.1 undecidable manual P 152 46.3203 50 -0.16 92
IV.MTRZ.HHE. 2021-09-22T13:16:41.16 0.6 undecidable manual S 336 17.871 120 1.21 33
IV.FIU.EHN. 2021-09-22T13:16:41.98 1.0 undecidable manual P 358 52.7028 50 -0.44 21
IV.BRIS.HHZ. 2021-09-22T13:16:41.16 0.6 undecidable manual S 72 20.868 116 0.31 47
IV.LMD.HHZ. 2021-09-22T13:16:40.34 0.6 undecidable manual S 123 17.9709 120 0.36 46
IV.SEI.HHZ. 2021-09-22T13:16:40.13 0.6 undecidable manual S 226 17.7711 120 0.23 48
IV.SFI.EHZ. 2021-09-22T13:16:40.25 0.1 undecidable manual P 138 39.1275 50 -0.08 95
IV.RUFI.EHZ. 2021-09-22T13:16:39.85 0.6 undecidable manual P 181 36.3414 50 -0.06 48
IV.MOCL.EHZ. 2021-09-22T13:16:39.05 0.1 undecidable manual P 237 32.2455 50 -0.22 93
IV.IMOL.HNZ. 2021-09-22T13:16:38.61 1.0 undecidable manual P 40 27.9498 50 0 25
IV.BOSL.HHZ. 2021-09-22T13:16:38.74 0.1 undecidable manual P 204 28.4493 50 0.05 97
IV.FNVD.HHZ. 2021-09-22T13:16:38.94 0.1 positive manual P 271 31.4463 50 -0.21 94
IT.FAZ.HNZ. 2021-09-22T13:16:38.98 1.0 undecidable manual P 64 33.0447 50 -0.42 22
IV.BRIS.HHZ. 2021-09-22T13:16:37.36 0.1 undecidable manual P 72 20.868 116 -0.08 98
IV.MTRZ.HHE. 2021-09-22T13:16:37.06 0.1 undecidable manual P 336 17.871 120 0.14 97
IV.LMD.HHZ. 2021-09-22T13:16:36.80 0.6 undecidable manual P 123 17.9709 120 -0.14 49
IV.SEI.HHZ. 2021-09-22T13:16:36.88 0.1 positive manual P 226 17.7711 120 -0.01 100
IV.VISG.HHZ. 2021-09-22T13:16:36.56 0.6 undecidable manual S 291 7.0929 145 -0.57 45
IV.VISG.HHZ. 2021-09-22T13:16:34.95 0.1 undecidable manual P 291 7.0929 145 -0.34 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:2.3 0.00283 0.18 AML other m 2021-09-22T13:16:36.58
IV.VISG.HHN. ML:2.4 0.0036849999999999995 0.18 AML other m 2021-09-22T13:16:36.76
IV.SEI.HHN. ML:1.9 0.0006450000000000001 0.28 AML other m 2021-09-22T13:16:40.56
IV.LMD.HHN. ML:1.3 0.000157 0.1 AML other m 2021-09-22T13:16:40.94
IV.SEI.HHE. ML:1.8 0.0004745 0.26 AML other m 2021-09-22T13:16:42.66
IV.BRIS.HHN. ML:1.7 0.00037464025 0.2048 AML other m 2021-09-22T13:16:42.96
IV.LMD.HHE. ML:1.2 0.0001375 0.3 AML other m 2021-09-22T13:16:43.37
IV.BOSL.HHE. ML:1.0 0.0000565 0.14 AML other m 2021-09-22T13:16:44.16
IV.FNVD.HHN. ML:1.7 0.0002125 0.14 AML other m 2021-09-22T13:16:44.49
IV.BRIS.HHE. ML:1.7 0.00037784225000000006 0.3968 AML other m 2021-09-22T13:16:45.33
IV.FNVD.HHE. ML:1.8 0.0002635 0.32 AML other m 2021-09-22T13:16:45.51
IV.MOCL.EHN. ML:1.2 0.00006805 1.14 AML other m 2021-09-22T13:16:45.76
IV.MOCL.EHE. ML:1.2 0.00006634999999999999 0.68 AML other m 2021-09-22T13:16:45.56
IV.BOSL.HHN. ML:1.0 0.000050900000000000004 1.66 AML other m 2021-09-22T13:16:47.88
IV.SFI.EHN. ML:1.3 0.0000746 0.42 AML other m 2021-09-22T13:16:47.33
IV.SFI.EHE. ML:1.2 0.00004815 0.66 AML other m 2021-09-22T13:16:48.61
IV.ASQU.HHN. ML:1.2 0.000050799999999999995 0.94 AML other m 2021-09-22T13:16:49.22
IV.ASQU.HHE. ML:1.2 0.00004445 0.46 AML other m 2021-09-22T13:16:51.43
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