Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 16-10-2023 and time 20:52:19 (Italy) in region 4 km W Tredozio (FC)

A magnitude ML 2.1 earthquake occured in region: 4 km W Tredozio (FC), on

  • 16-10-2023 18:52:19 (UTC)
  • 16-10-2023 20:52:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0660, 11.6970 at 7 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.

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
Tredozio FC 4 1212 1212
Marradi FI 7 3139 4351
Portico e San Benedetto FC 8 756 5107
Rocca San Casciano FC 12 1910 7017
Premilcuore FC 12 799 7816
Modigliana FC 13 4560 12376
Palazzuolo sul Senio FI 13 1154 13530
Dovadola FC 17 1653 15183
San Godenzo FI 17 1167 16350
Brisighella RA 18 7639 23989
Casola Valsenio RA 19 2617 26606
Galeata FC 19 2516 29122

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SW of Faenza (58541 inhabitants)
32 Km S of Imola (69797 inhabitants)
33 Km SW of Forlì (117913 inhabitants)
44 Km W of Cesena (96758 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
52 Km E of Prato (191150 inhabitants)
54 Km NE of Scandicci (50609 inhabitants)
55 Km SE of Bologna (386663 inhabitants)
56 Km SW of Ravenna (159116 inhabitants)
64 Km E of Pistoia (90315 inhabitants)
68 Km N of Arezzo (99543 inhabitants)
70 Km W of Rimini (147750 inhabitants)
86 Km S of Ferrara (133155 inhabitants)
88 Km NE of Siena (53903 inhabitants)
89 Km SE of Modena (184973 inhabitants)
99 Km E of Lucca (89046 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 2.1 2023-10-16
18:52:19		 44.0662 11.6973 7 2023-10-16
18:58:13		 Sala Sismica INGV-Roma 122132351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-16 18:52:19 ± 0.1
Latitude 44.0662 ± 0.0036
Longitude 11.6973 ± 0.0050
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122132351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 449
Semi-minor axis of confidence ellipse (meter) 77
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 302
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.42448
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 16
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 122132351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-16 18:58:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATMI.HHZ. 2023-10-16T18:52:49.59 3.0 undecidable manual S 0.13 0
GU.POPM.HHZ. 2023-10-16T18:52:43.38 3.0 undecidable manual S -0.35 0
IV.PII.HHZ. 2023-10-16T18:52:37.98 3.0 undecidable manual P 0.55 0
IV.NARO.HHZ. 2023-10-16T18:52:34.00 3.0 undecidable manual P -1.43 0
GU.POPM.HHZ. 2023-10-16T18:52:32.60 3.0 positive manual P -0.5 0
IV.BOSL.HHZ. 2023-10-16T18:52:30.04 0.3 undecidable manual S 240 29.8479 103 0.08 72
IV.RUFI.EHZ. 2023-10-16T18:52:29.84 0.3 undecidable manual S 211 29.4483 103 0.02 72
IV.VISG.HHZ. 2023-10-16T18:52:28.39 0.3 undecidable manual S 303 24.9528 105 0.05 72
IV.SEI.HHZ. 2023-10-16T18:52:28.96 0.3 undecidable manual S 267 27.0507 104 -0.06 72
IV.FNVD.HHZ. 2023-10-16T18:52:28.32 0.1 negative manual P 284 47.1195 50 -0.28 89
IV.BRSN.HNE. 2023-10-16T18:52:28.10 1.0 undecidable manual P 51 38.9277 100 0.83 19
IV.CRE.HHZ. 2023-10-16T18:52:28.86 3.0 undecidable manual P -0.81 0
IV.SFI.EHZ. 2023-10-16T18:52:27.22 0.3 undecidable manual S 146 21.5673 107 0.04 73
IV.MOCL.EHZ. 2023-10-16T18:52:27.23 0.6 negative manual P 261 41.7249 50 -0.55 42
IV.RINC.EHZ. 2023-10-16T18:52:27.48 0.3 undecidable manual S 200 21.1677 108 0.41 68
IV.MTRZ.HHZ. 2023-10-16T18:52:26.75 0.6 undecidable manual P 322 34.9428 101 0.27 45
IV.VMGN.HHZ. 2023-10-16T18:52:26.54 0.3 undecidable manual S 227 18.0708 110 0.5 67
IV.IMOL.EHZ. 2023-10-16T18:52:26.79 0.1 negative manual P 6 32.745 102 0.73 79
IT.MCS.HGZ. 2023-10-16T18:52:26.04 0.3 undecidable manual P 104 33.6441 101 -0.19 69
IV.BOSL.HHZ. 2023-10-16T18:52:25.37 0.1 positive manual P 240 29.8479 103 -0.11 95
IV.RUFI.EHZ. 2023-10-16T18:52:25.17 0.1 positive manual P 211 29.4483 103 -0.23 92
IT.MOG.HNE. 2023-10-16T18:52:24.74 0.6 undecidable manual S 26 12.7761 118 0.36 46
IV.VISG.HHZ. 2023-10-16T18:52:24.36 0.1 undecidable manual P 303 24.9528 105 -0.18 94
IV.SEI.HHZ. 2023-10-16T18:52:24.68 0.1 positive manual P 267 27.0507 104 -0.26 92
IV.RINC.EHZ. 2023-10-16T18:52:23.89 0.1 positive manual P 200 21.1677 108 0.08 97
IV.VMGN.HHZ. 2023-10-16T18:52:23.43 0.1 positive manual P 227 18.0708 110 0.21 95
IV.SFI.EHZ. 2023-10-16T18:52:23.78 0.1 positive manual P 146 21.5673 107 -0.09 96
IT.MRR.HGZ. 2023-10-16T18:52:22.94 0.3 undecidable manual S 268 7.4814 132 0.09 74
IT.MOG.HNE. 2023-10-16T18:52:22.30 0.1 undecidable manual P 26 12.7761 118 0.04 99
IV.LMD.HHZ. 2023-10-16T18:52:21.17 0.3 undecidable manual S 32 1.4985 167 -0.57 67
IT.MRR.HGZ. 2023-10-16T18:52:21.41 0.1 undecidable manual P 268 7.4814 132 0.03 100
IV.LMD.HHZ. 2023-10-16T18:52:20.37 0.1 undecidable manual P 32 1.4985 167 -0.37 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VMGN.HHE. ML:2.0 0.0009685000000000001 1.38 AML other m 2023-10-16T18:52:27.73
IV.VMGN.HHN. ML:2.1 0.001053 0.74 AML other m 2023-10-16T18:52:27.55
IV.SFI.HNN. ML:1.9 0.0005675 1.06 AML other m 2023-10-16T18:52:28.09
IV.RINC.EHN. ML:2.1 0.001 1.24 AML other m 2023-10-16T18:52:28.12
IV.RINC.EHE. ML:2.0 0.00083 0.36 AML other m 2023-10-16T18:52:28.31
IV.SFI.EHE. ML:1.9 0.0005484999999999999 0.84 AML other m 2023-10-16T18:52:28.19
IV.SFI.HNE. ML:1.9 0.0005899999999999999 0.84 AML other m 2023-10-16T18:52:28.61
IV.VISG.HHE. ML:1.9 0.000508 1 AML other m 2023-10-16T18:52:28.65
IV.VISG.HHN. ML:2.1 0.000834 0.14 AML other m 2023-10-16T18:52:28.76
IV.SEI.HHE. ML:2.6 0.002105 0.28 AML other m 2023-10-16T18:52:29.25
IV.RUFI.EHN. ML:2.3 0.0010425 0.26 AML other m 2023-10-16T18:52:30.08
IV.RUFI.EHE. ML:1.6 0.00020950000000000002 1.16 AML other m 2023-10-16T18:52:30.25
IV.SEI.HHN. ML:2.7 0.0030999999999999995 0.38 AML other m 2023-10-16T18:52:30.54
IV.BOSL.HHN. ML:1.7 0.000229 0.38 AML other m 2023-10-16T18:52:30.61
IV.SFI.EHN. ML:1.8 0.0005005000000000001 0.94 AML other m 2023-10-16T18:52:30.31
IV.BOSL.HHE. ML:1.5 0.0001715 0.24 AML other m 2023-10-16T18:52:32.30
IV.MOCL.EHN. ML:2.4 0.0008 1.12 AML other m 2023-10-16T18:52:33.92
IV.MOCL.EHE. ML:2.3 0.0006525 0.16 AML other m 2023-10-16T18:52:34.10
IV.IMOL.EHE. ML:2.2 0.0007284999999999999 0.84 AML other m 2023-10-16T18:52:34.11
IV.IMOL.HNN. ML:2.5 0.0013599999999999999 0.26 AML other m 2023-10-16T18:52:34.42
IV.IMOL.HNE. ML:2.5 0.001545 0.88 AML other m 2023-10-16T18:52:34.90
IV.IMOL.EHN. ML:2.0 0.0004904999999999999 0.3 AML other m 2023-10-16T18:52:34.59
IV.MTRZ.HHN. ML:2.1 0.0004865 0.46 AML other m 2023-10-16T18:52:35.66
IV.CRE.HHE. ML:1.9 0.000182 1.12 AML other m 2023-10-16T18:52:37.16
IV.MTRZ.HNN. ML:2.1 0.0005110000000000001 0.42 AML other m 2023-10-16T18:52:38.55
IV.MTRZ.HNE. ML:2.1 0.0005875 1.06 AML other m 2023-10-16T18:52:38.41
IV.MTRZ.HHE. ML:2.1 0.000568 1.06 AML other m 2023-10-16T18:52:38.41
IV.CRE.HHN. ML:2.1 0.0003165 0.54 AML other m 2023-10-16T18:52:39.87
IV.PII.HHE. ML:2.0 0.0001021 0.42 AML other m 2023-10-16T18:52:50.26
IV.ATMI.HHE. ML:2.0 0.000126 0.6 AML other m 2023-10-16T18:52:51.49
IV.PII.HHN. ML:1.8 0.0000649 1.32 AML other m 2023-10-16T18:52:53.02
IV.ATMI.HHN. ML:2.1 0.00014150000000000002 1.48 AML other m 2023-10-16T18:52:59.97
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
Waveforms Seismic signals in miniseed + resp format Download