Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 19-09-2023 and time 12:45:16 (Italy) in region 5 km W Tredozio (FC)

A magnitude ML 1.4 earthquake occured in region: 5 km W Tredozio (FC), on

  • 19-09-2023 10:45:16 (UTC)
  • 19-09-2023 12:45:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0740, 11.6820 at 8 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
Tredozio FC 5 1212 1212
Marradi FI 6 3139 4351
Portico e San Benedetto FC 10 756 5107
Palazzuolo sul Senio FI 12 1154 6261
Modigliana FC 13 4560 10821
Rocca San Casciano FC 13 1910 12731
Premilcuore FC 13 799 13530
San Godenzo FI 17 1167 14697
Casola Valsenio RA 17 2617 17314
Dovadola FC 17 1653 18967
Brisighella RA 18 7639 26606

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SW of Faenza (58541 inhabitants)
31 Km S of Imola (69797 inhabitants)
33 Km SW of Forlì (117913 inhabitants)
45 Km W of Cesena (96758 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
51 Km E of Prato (191150 inhabitants)
53 Km NE of Scandicci (50609 inhabitants)
54 Km SE of Bologna (386663 inhabitants)
56 Km SW of Ravenna (159116 inhabitants)
63 Km E of Pistoia (90315 inhabitants)
69 Km N of Arezzo (99543 inhabitants)
71 Km W of Rimini (147750 inhabitants)
85 Km S of Ferrara (133155 inhabitants)
88 Km SE of Modena (184973 inhabitants)
89 Km NE of Siena (53903 inhabitants)
98 Km E of Lucca (89046 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 1.4 2023-09-19
10:45:16		 44.0743 11.682 8 2023-09-19
10:59:04		 Sala Sismica INGV-Roma 121228341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-19 10:45:16 ± 0.07
Latitude 44.0743 ± 0.0036
Longitude 11.6820 ± 0.0038
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121228341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 317
Semi-minor axis of confidence ellipse (meter) 165
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 171
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.49463
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 121228341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-19 10:59:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CASP.HHZ. 2023-09-19T10:45:40.39 3.0 positive manual P 0.14 0
IV.CRE.HHZ. 2023-09-19T10:45:34.11 0.3 undecidable manual S 157 54.9006 50 0.26 65
IV.MOCL.EHZ. 2023-09-19T10:45:30.03 0.3 undecidable manual S 259 40.7259 50 -0.01 71
IT.MCS.HGN. 2023-09-19T10:45:28.95 0.3 undecidable manual S 105 35.0427 103 0.48 65
IV.RUFI.EHZ. 2023-09-19T10:45:26.56 0.1 undecidable manual S 208 29.6481 105 -0.09 95
IV.BOSL.HHZ. 2023-09-19T10:45:26.71 0.3 undecidable manual S 237 29.2485 105 0.19 70
IV.SEI.HHZ. 2023-09-19T10:45:25.57 0.3 undecidable manual S 265 25.8519 107 0.17 70
IV.CRE.HHZ. 2023-09-19T10:45:25.85 0.3 undecidable manual P 157 54.9006 50 -0.46 63
IV.VISG.HHZ. 2023-09-19T10:45:24.77 0.3 undecidable manual S 303 23.4543 109 0.17 70
IV.RINC.EHZ. 2023-09-19T10:45:24.24 0.1 undecidable manual S 196 21.6672 110 0.22 93
IV.SFI.EHZ. 2023-09-19T10:45:24.48 0.1 undecidable manual S 145 22.9548 109 0.05 96
IV.VMGN.HHZ. 2023-09-19T10:45:23.07 0.3 undecidable manual S 222 17.871 114 0.29 69
IV.MOCL.EHZ. 2023-09-19T10:45:23.94 0.1 undecidable manual P 259 40.7259 50 -0.17 91
IV.BOSL.HHZ. 2023-09-19T10:45:22.06 0.1 undecidable manual P 237 29.2485 105 -0.02 96
IT.MCS.HGN. 2023-09-19T10:45:22.99 0.6 undecidable manual P 105 35.0427 103 -0.22 46
IV.RUFI.EHZ. 2023-09-19T10:45:21.88 0.1 undecidable manual P 208 29.6481 105 -0.27 91
IT.MOG.HNE. 2023-09-19T10:45:21.51 0.1 undecidable manual S 32 12.5763 122 0.34 92
IV.SEI.HHZ. 2023-09-19T10:45:21.29 0.1 undecidable manual P 265 25.8519 107 -0.14 94
IV.RINC.EHZ. 2023-09-19T10:45:20.64 0.1 undecidable manual P 196 21.6672 110 0.01 97
IV.SFI.EHZ. 2023-09-19T10:45:20.72 0.1 undecidable manual P 145 22.9548 109 -0.16 94
IV.VISG.HHZ. 2023-09-19T10:45:20.90 0.1 undecidable manual P 303 23.4543 109 -0.07 96
IV.VMGN.HHZ. 2023-09-19T10:45:20.11 0.1 undecidable manual P 222 17.871 114 0.19 94
IT.MOG.HNE. 2023-09-19T10:45:19.11 0.1 undecidable manual P 32 12.5763 122 0.12 97
IT.MRR.HGN. 2023-09-19T10:45:19.52 0.1 undecidable manual S 260 6.3936 141 -0.01 100
IV.LMD.HHZ. 2023-09-19T10:45:18.00 0.6 undecidable manual S 80 1.998 165 -0.83 40
IT.MRR.HGN. 2023-09-19T10:45:18.06 0.1 undecidable manual P 260 6.3936 141 0.02 100
IV.LMD.HHZ. 2023-09-19T10:45:17.28 0.1 undecidable manual P 80 1.998 165 -0.36 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VMGN.HHN. ML:1.4 0.000213 0.82 AML other m 2023-09-19T10:45:23.97
IV.VMGN.HHE. ML:1.5 0.0002755 0.36 AML other m 2023-09-19T10:45:23.62
IV.SFI.EHN. ML:1.3 0.0001255 0.14 AML other m 2023-09-19T10:45:24.76
IV.RINC.EHE. ML:1.4 0.000194 0.8 AML other m 2023-09-19T10:45:24.80
IV.VISG.HHE. ML:1.5 0.00020950000000000002 1.7 AML other m 2023-09-19T10:45:24.99
IV.RINC.EHN. ML:1.4 0.00016010000000000002 0.3 AML other m 2023-09-19T10:45:25.37
IV.SFI.EHE. ML:1.3 0.0001275 1.38 AML other m 2023-09-19T10:45:25.94
IV.VISG.HHN. ML:1.6 0.00023999999999999998 1.18 AML other m 2023-09-19T10:45:25.09
IV.SEI.HHE. ML:1.8 0.0003985 1.32 AML other m 2023-09-19T10:45:25.25
IV.RUFI.EHN. ML:1.4 0.00014150000000000002 0.28 AML other m 2023-09-19T10:45:26.71
IV.RUFI.EHE. ML:0.8 0.000033048499999999994 0.24 AML other m 2023-09-19T10:45:26.86
IV.SEI.HHN. ML:2.1 0.000751 0.36 AML other m 2023-09-19T10:45:27.37
IV.BOSL.HHN. ML:1.0 0.00005625 0.74 AML other m 2023-09-19T10:45:27.61
IV.BOSL.HHE. ML:0.9 0.00004025 0.44 AML other m 2023-09-19T10:45:27.66
IV.MOCL.EHE. ML:1.4 0.00008295 0.44 AML other m 2023-09-19T10:45:30.09
IV.MOCL.EHN. ML:1.5 0.0001155 1 AML other m 2023-09-19T10:45:31.98
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