Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 12-10-2023 and time 23:57:38 (Italy) in region 3 km SW Brisighella (RA)

A magnitude ML 1.3 earthquake occured in region: 3 km SW Brisighella (RA), on

  • 12-10-2023 21:57:38 (UTC)
  • 12-10-2023 23:57:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2000, 11.7440 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.

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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
Brisighella RA 3 7639 7639
Modigliana FC 6 4560 12199
Riolo Terme RA 9 5720 17919
Casola Valsenio RA 10 2617 20536
Tredozio FC 13 1212 21748
Castel Bolognese RA 14 9554 31302
Dovadola FC 14 1653 32955
Faenza RA 15 58541 91496
Casalfiumanese BO 15 3438 94934
Borgo Tossignano BO 15 3288 98222
Fontanelice BO 16 1943 100165
Castrocaro Terme e Terra del Sole FC 17 6426 106591
Rocca San Casciano FC 17 1910 108501
Marradi FI 17 3139 111640
Imola BO 17 69797 181437
Palazzuolo sul Senio FI 18 1154 182591
Castel del Rio BO 19 1246 183837
Portico e San Benedetto FC 20 756 184593
Solarolo RA 20 4488 189081

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SW of Faenza (58541 inhabitants)
17 Km S of Imola (69797 inhabitants)
24 Km W of Forlì (117913 inhabitants)
40 Km W of Cesena (96758 inhabitants)
44 Km SW of Ravenna (159116 inhabitants)
46 Km SE of Bologna (386663 inhabitants)
62 Km NE of Firenze (382808 inhabitants)
63 Km NE of Prato (191150 inhabitants)
67 Km NE of Scandicci (50609 inhabitants)
67 Km W of Rimini (147750 inhabitants)
72 Km S of Ferrara (133155 inhabitants)
72 Km E of Pistoia (90315 inhabitants)
82 Km SE of Modena (184973 inhabitants)
82 Km N of Arezzo (99543 inhabitants)
94 Km SE of Carpi (70699 inhabitants)
97 Km S of Rovigo (51867 inhabitants)
99 Km W of Pesaro (94582 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
Reviewed
Rev100 		ML 1.3 2023-10-12
21:57:38		 44.2 11.7445 10 2023-10-12
22:07:10		 Sala Sismica INGV-Roma 122025471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-12 21:57:38 ± 0.39
Latitude 44.2000 ± 0.0144
Longitude 11.7445 ± 0.0188
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122025471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1947
Semi-minor axis of confidence ellipse (meter) 851
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 222
Circular confidence region, given by single value of horizontal uncertainty (meter) 1950.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 230
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.31296
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.5
Num. used stations 14
Type of magnitude ML
Reference to an origin 122025471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-12 22:07:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.NSC3.EHZ.02 2023-10-12T21:59:21.54 3.0 undecidable manual Sn -2.7 0
IT.DLNV.HNZ. 2023-10-12T21:59:07.33 3.0 positive manual Pn -0.97 0
CR.STON.BHZ. 2023-10-12T21:58:53.42 3.0 positive manual Pg 23.190001 0
IV.MCRV.HHZ. 2023-10-12T21:58:35.85 3.0 undecidable manual Pn 2.8 0
IV.SACR.HHZ. 2023-10-12T21:58:35.91 3.0 negative manual Pg 12.54 0
IV.GATE.HHZ. 2023-10-12T21:58:28.82 3.0 undecidable manual Pn 5.91 0
IV.SGTA.HHZ. 2023-10-12T21:58:26.55 3.0 undecidable manual Pn -3.18 0
GU.GRAM.HHZ. 2023-10-12T21:58:18.69 3.0 undecidable manual Sg 0.15 0
MN.TRI.HHZ. 2023-10-12T21:58:17.26 3.0 undecidable manual Sg 8.01 0
IV.RCAV.EHZ. 2023-10-12T21:58:13.42 3.0 undecidable manual Pn 1.25 0
IV.INTR.HHZ. 2023-10-12T21:58:12.11 3.0 undecidable manual Pn -0.26 0
IV.MML1.EHZ. 2023-10-12T21:57:55.43 3.0 negative manual Pn 0.33 0
IV.SNTG.HHZ. 2023-10-12T21:57:54.21 3.0 undecidable manual Pn 1.07 0
IV.SFI.EHZ. 2023-10-12T21:57:50.28 0.1 undecidable manual S 166 33.744 50 -0.15 95
IV.SEI.HHZ. 2023-10-12T21:57:50.31 0.1 undecidable manual S 242 34.743 50 -0.38 90
IV.VMGN.HHZ. 2023-10-12T21:57:50.41 0.1 undecidable manual S 212 32.0457 50 0.43 89
IV.VISG.HHZ. 2023-10-12T21:57:48.10 0.1 undecidable manual S 267 24.6531 112 0.14 96
IV.SFI.EHZ. 2023-10-12T21:57:46.24 1.0 undecidable manual P 166 33.744 50 0.76 20
IV.SBPO.HNZ. 2023-10-12T21:57:46.35 3.0 positive manual P -0.5 0
IV.SEI.HHZ. 2023-10-12T21:57:45.75 0.1 undecidable manual P 242 34.743 50 0.12 95
IV.MTRZ.HHZ. 2023-10-12T21:57:45.05 0.6 undecidable manual P 296 28.3494 50 0.4 45
IV.VMGN.HHZ. 2023-10-12T21:57:44.59 0.6 positive manual P 212 32.0457 50 -0.62 42
IV.LMD.HHZ. 2023-10-12T21:57:44.71 0.1 undecidable manual S 192 13.875 126 0.05 100
IV.VISG.HHZ. 2023-10-12T21:57:43.52 0.6 undecidable manual P 267 24.6531 112 -0.53 44
IV.LMD.HHZ. 2023-10-12T21:57:42.07 0.3 positive manual P 192 13.875 126 -0.08 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.0 0.0001085 0.3 AML other m 2023-10-12T21:57:45.47
IV.LMD.HHN. ML:1.0 0.00011499999999999999 0.22 AML other m 2023-10-12T21:57:45.64
IV.SBPO.HNN. ML:2.8 0.00044699999999999997 0.8 AML other m 2023-10-12T21:57:46.77
IV.SBPO.HNE. ML:3.5 0.0023899999999999998 0.06 AML other m 2023-10-12T21:57:48.60
IV.VISG.HHE. ML:1.1 0.0000722 0.74 AML other m 2023-10-12T21:57:48.27
IV.VISG.HHN. ML:1.2 0.00009445 0.32 AML other m 2023-10-12T21:57:48.65
IV.VMGN.HHN. ML:0.6 0.0000223 0.24 AML other m 2023-10-12T21:57:50.66
IV.VMGN.HHE. ML:0.6 0.00001925 1.18 AML other m 2023-10-12T21:57:51.88
IV.MTRZ.HHE. ML:1.2 0.0000893 0.78 AML other m 2023-10-12T21:57:52.58
IV.MTRZ.HHN. ML:1.3 0.0000979 0.28 AML other m 2023-10-12T21:57:52.45
IV.SEI.HHE. ML:1.2 0.0000698 1.06 AML other m 2023-10-12T21:57:52.93
IV.SEI.HHN. ML:1.3 0.00007374999999999999 0.52 AML other m 2023-10-12T21:57:53.30
GU.GRAM.HHN. ML:2.5 0.0001725 0.54 AML other m 2023-10-12T21:58:19.40
GU.GRAM.HHE. ML:2.2 0.0001065 0.76 AML other m 2023-10-12T21:58:23.78
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