Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 18-09-2023 and time 05:32:09 (Italy) in region 7 km SW Tredozio (FC)

A magnitude ML 2.0 earthquake occured in region: 7 km SW Tredozio (FC), on

  • 18-09-2023 03:32:09 (UTC)
  • 18-09-2023 05:32:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0400, 11.6830 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.

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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 7 1212 1212
Marradi FI 7 3139 4351
Portico e San Benedetto FC 8 756 5107
Premilcuore FC 10 799 5906
Rocca San Casciano FC 13 1910 7816
San Godenzo FI 14 1167 8983
Palazzuolo sul Senio FI 14 1154 10137
Modigliana FC 16 4560 14697
Dovadola FC 19 1653 16350
Galeata FC 19 2516 18866

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SW of Faenza (58541 inhabitants)
35 Km S of Imola (69797 inhabitants)
35 Km SW of Forlì (117913 inhabitants)
46 Km NE of Firenze (382808 inhabitants)
46 Km W of Cesena (96758 inhabitants)
50 Km E of Prato (191150 inhabitants)
51 Km NE of Scandicci (50609 inhabitants)
57 Km SE of Bologna (386663 inhabitants)
59 Km SW of Ravenna (159116 inhabitants)
62 Km E of Pistoia (90315 inhabitants)
66 Km N of Arezzo (99543 inhabitants)
71 Km W of Rimini (147750 inhabitants)
85 Km NE of Siena (53903 inhabitants)
89 Km S of Ferrara (133155 inhabitants)
90 Km SE of Modena (184973 inhabitants)
97 Km E of Lucca (89046 inhabitants)
100 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 2.0 2023-09-18
03:32:09		 44.0403 11.6832 7 2023-09-18
03:43:17		 Sala Sismica INGV-Roma 121151911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-18 03:32:09 ± 0.1
Latitude 44.0403 ± 0.0054
Longitude 11.6832 ± 0.0075
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 121151911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 610
Semi-minor axis of confidence ellipse (meter) 325
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 27
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.83997
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 24
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 52
Type of magnitude ML
Reference to an origin 121151911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-18 03:43:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BULT.EHZ. 2023-09-18T03:34:00.06 3.0 undecidable manual Sn 0.65 0
IV.MTCE.HHZ. 2023-09-18T03:33:17.06 3.0 undecidable manual Sg 3.52 0
IV.FIAM.HHZ. 2023-09-18T03:33:12.03 3.0 undecidable manual Sn 1.02 0
IV.ZOVE.EHZ. 2023-09-18T03:32:54.44 3.0 undecidable manual S -0.37 0
IV.ARVD.HHZ. 2023-09-18T03:32:47.17 3.0 undecidable manual S 0.67 0
ST.VARA.EHZ. 2023-09-18T03:32:45.97 3.0 undecidable manual Pg 5.01 0
IV.CTI.HHZ. 2023-09-18T03:32:43.17 3.0 undecidable manual Pn 0.35 0
IV.CSNT.HHZ. 2023-09-18T03:32:32.46 0.1 undecidable manual S 207 70.374 50 0.8 73
IV.OSSC.HHZ. 2023-09-18T03:32:30.94 0.3 undecidable manual S 212 67.1772 50 0.13 67
IV.PARC.HHZ. 2023-09-18T03:32:29.39 0.1 undecidable manual S 134 62.1933 50 -0.08 91
IV.CRMI.HHZ. 2023-09-18T03:32:29.82 0.3 undecidable manual S 244 62.3931 50 0.28 66
IV.ATVO.HHZ. 2023-09-18T03:32:26.58 0.3 undecidable manual P 141 93.24 50 0.74 54
IV.MPPT.EHZ. 2023-09-18T03:32:25.40 0.6 undecidable manual S 259 48.2184 50 -0.34 44
IV.ATMI.HHZ. 2023-09-18T03:32:25.98 0.1 undecidable manual P 149 91.3419 50 0.44 80
IV.PIEI.HHZ. 2023-09-18T03:32:24.97 0.3 undecidable manual P 129 88.245 50 -0.1 65
IV.ATPI.EHZ. 2023-09-18T03:32:24.33 0.1 undecidable manual P 138 87.1461 50 -0.57 78
IV.NARO.HHZ. 2023-09-18T03:32:24.11 0.3 undecidable manual P 123 86.1471 50 -0.64 57
IV.IMOL.EHZ. 2023-09-18T03:32:23.46 0.1 undecidable manual S 8 35.742 101 1.29 61
IV.CAFI.HHZ. 2023-09-18T03:32:23.98 0.1 undecidable manual P 164 82.0512 50 -0.14 87
GU.POPM.HHZ. 2023-09-18T03:32:23.05 0.1 undecidable manual P 271 73.8705 50 0.2 87
IV.BADI.EHZ. 2023-09-18T03:32:22.31 0.1 undecidable manual P 142 74.0703 50 -0.57 80
IV.RSM2.HHZ. 2023-09-18T03:32:22.49 0.3 undecidable manual P 100 61.8936 50 1.49 39
IV.CSNT.HHZ. 2023-09-18T03:32:22.37 0.1 undecidable manual P 207 70.374 50 0.06 90
IV.BLLA.EHN. 2023-09-18T03:32:21.93 0.1 undecidable manual P 79 63.7917 50 0.64 79
IV.OSSC.HHZ. 2023-09-18T03:32:21.40 0.3 undecidable manual P 212 67.1772 50 -0.42 63
IV.PARC.HHZ. 2023-09-18T03:32:20.32 0.1 undecidable manual P 134 62.1933 50 -0.72 77
IV.CRMI.HHZ. 2023-09-18T03:32:20.92 0.3 undecidable manual P 244 62.3931 50 -0.17 67
IV.RUFI.EHZ. 2023-09-18T03:32:19.20 0.3 undecidable manual S 212 26.3514 105 0.2 71
IV.BOSL.HHZ. 2023-09-18T03:32:19.56 0.1 undecidable manual S 244 27.4503 104 0.19 95
IV.SEI.HHZ. 2023-09-18T03:32:18.83 0.3 undecidable manual S 274 25.9518 105 -0.02 74
IV.VISG.HHZ. 2023-09-18T03:32:18.26 0.1 undecidable manual S 310 25.752 105 -0.54 88
IV.MPPT.EHZ. 2023-09-18T03:32:18.31 0.3 undecidable manual P 259 48.2184 50 -0.58 62
IV.MTRZ.HNZ. 2023-09-18T03:32:17.30 0.1 undecidable manual P 326 36.5412 101 0.31 91
IV.RINC.EHZ. 2023-09-18T03:32:16.82 0.3 undecidable manual S 200 18.0708 111 0.55 67
IV.SFI.HNZ. 2023-09-18T03:32:16.78 0.1 undecidable manual S 139 19.9689 109 -0.08 99
IV.IMOL.EHZ. 2023-09-18T03:32:16.67 0.1 undecidable manual P 8 35.742 101 -0.16 95
IV.VMGN.HHZ. 2023-09-18T03:32:15.87 0.3 undecidable manual S 232 15.2736 115 0.5 68
IV.VISG.HHZ. 2023-09-18T03:32:14.21 0.1 undecidable manual P 310 25.752 105 -0.67 84
IV.BOSL.HHZ. 2023-09-18T03:32:14.96 0.1 undecidable manual P 244 27.4503 104 -0.25 94
IV.RUFI.EHZ. 2023-09-18T03:32:14.71 0.1 undecidable manual P 212 26.3514 105 -0.29 93
IV.SEI.HHZ. 2023-09-18T03:32:14.85 0.1 undecidable manual P 274 25.9518 105 -0.06 98
IV.RINC.EHZ. 2023-09-18T03:32:13.39 0.1 undecidable manual P 200 18.0708 111 -0.03 100
IV.SFI.HNZ. 2023-09-18T03:32:13.42 0.1 undecidable manual P 139 19.9689 109 -0.34 93
IV.VMGN.HHZ. 2023-09-18T03:32:13.01 0.1 undecidable manual P 232 15.2736 115 0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.HNN. ML:2.4 0.001765 1.84 AML other m 2023-09-18T03:32:16.95
IV.SFI.EHN. ML:2.4 0.001795 1.84 AML other m 2023-09-18T03:32:16.96
IV.SFI.HNE. ML:2.2 0.001432284 0.2 AML other m 2023-09-18T03:32:17.68
IV.SFI.EHE. ML:2.2 0.00143584 0.2 AML other m 2023-09-18T03:32:17.68
IV.RINC.EHE. ML:2.2 0.0012755455 0.4208 AML other m 2023-09-18T03:32:18.43
IV.RINC.EHN. ML:2.2 0.00128 1.56 AML other m 2023-09-18T03:32:18.91
IV.VISG.HHN. ML:1.9 0.0005101015 0.0992 AML other m 2023-09-18T03:32:19.25
IV.VISG.HHE. ML:1.7 0.00029214275 0.16 AML other m 2023-09-18T03:32:19.05
IV.BOSL.HHN. ML:1.7 0.0003035 0.26 AML other m 2023-09-18T03:32:19.84
IV.BOSL.HHE. ML:1.6 0.00020377345 0.1616 AML other m 2023-09-18T03:32:20.76
IV.IMOL.HNE. ML:0.0 0.0014172470000000002 0.2608 AML other m 2023-09-18T03:32:25.19
IV.IMOL.HNN. ML:0.0 0.00126996795 0.1904 AML other m 2023-09-18T03:32:25.21
IV.MPPT.EHE. ML:1.8 0.0001725 0.6 AML other m 2023-09-18T03:32:28.42
IV.MPPT.EHN. ML:1.8 0.00016499999999999997 0.32 AML other m 2023-09-18T03:32:30.01
IV.PARC.HHE. ML:1.7 0.00010449999999999999 1.74 AML other m 2023-09-18T03:32:30.90
IV.CRMI.HHN. ML:1.8 0.000130606 0.28 AML other m 2023-09-18T03:32:31.89
IV.CRMI.HHE. ML:1.6 0.000079561435 0.36 AML other m 2023-09-18T03:32:32.86
IV.PARC.HHN. ML:1.8 0.00011899999999999999 0.54 AML other m 2023-09-18T03:32:33.70
IV.OSSC.HHN. ML:2.1 0.00022639315 0.6208 AML other m 2023-09-18T03:32:35.18
GU.POPM.HHE. ML:1.9 0.000136 0.22 AML other m 2023-09-18T03:32:35.35
IV.CSNT.HHE. ML:2.0 0.00015041585 0.28 AML other m 2023-09-18T03:32:34.66
IV.CSNT.HHN. ML:2.2 0.000245 0.52 AML other m 2023-09-18T03:32:36.27
GU.POPM.HHN. ML:2.1 0.0001785 0.26 AML other m 2023-09-18T03:32:36.47
IV.OSSC.HHE. ML:2.1 0.00024242619999999997 0.3808 AML other m 2023-09-18T03:32:36.77
IV.BADI.EHE. ML:2.0 0.00014049999999999997 0.4 AML other m 2023-09-18T03:32:37.66
IV.BADI.EHN. ML:1.8 0.0001124413 0.3008 AML other m 2023-09-18T03:32:38.46
IV.CAFI.HHE. ML:2.0 0.000127622745 0.5808 AML other m 2023-09-18T03:32:39.84
IV.ATMI.HHE. ML:2.2 0.00018339985 0.36 AML other m 2023-09-18T03:32:43.81
IV.CAFI.HHN. ML:1.8 0.00007375 0.6 AML other m 2023-09-18T03:32:40.34
IV.ATPI.EHE. ML:1.8 0.0000724 0.62 AML other m 2023-09-18T03:32:41.53
IV.ATPI.EHN. ML:1.7 0.000059149999999999994 0.54 AML other m 2023-09-18T03:32:41.71
IV.ATVO.HHN. ML:2.0 0.0001033 1.66 AML other m 2023-09-18T03:32:43.05
IV.ATVO.HHE. ML:2.0 0.00010136182499999999 0.2992 AML other m 2023-09-18T03:32:44.06
IV.NARO.HHN. ML:1.6 0.00005255 0.3 AML other m 2023-09-18T03:32:45.30
IV.PIEI.HHN. ML:1.5 0.00003525 0.32 AML other m 2023-09-18T03:32:45.83
IV.NARO.HHE. ML:1.5 0.000041800000000000006 0.42 AML other m 2023-09-18T03:32:47.18
IV.PIEI.HHE. ML:1.8 0.00006900000000000001 0.32 AML other m 2023-09-18T03:32:48.61
IV.ATMI.HHN. ML:2.2 0.0001785 1.4 AML other m 2023-09-18T03:32:50.10
IV.CTI.HHN. ML:2.5 0.00007175000000000001 1.72 AML other m 2023-09-18T03:33:09.08
IV.CTI.HHE. ML:2.3 0.000050999154999999995 0.2208 AML other m 2023-09-18T03:33:10.75
IV.IMOL.EHE. ML:2.2 0.0006139984000000001 0.2992 AML other m 2023-09-18T03:32:24.46
IV.IMOL.EHN. ML:2.1 0.00051593775 0.2 AML other m 2023-09-18T03:32:25.57
IV.CRMI.HNE. ML:1.9 0.00015958424999999997 0.4 AML other m 2023-09-18T03:32:32.86
IV.CRMI.HNN. ML:2.1 0.00026658915 0.5008 AML other m 2023-09-18T03:32:33.23
IV.CAFI.HNE. ML:2.0 0.000129804405 0.5904 AML other m 2023-09-18T03:32:39.84
IV.CAFI.HNN. ML:1.8 0.000075039895 0.3184 AML other m 2023-09-18T03:32:40.34
IV.ATPI.HNE. ML:2.2 0.0001905675 0.8208 AML other m 2023-09-18T03:32:53.94
IV.ATPI.HNN. ML:2.1 0.00015852095 0.7104 AML other m 2023-09-18T03:32:36.26
IV.PIEI.HNE. ML:1.9 0.00009695908 0.4896 AML other m 2023-09-18T03:32:56.78
IV.PIEI.HNN. ML:2.0 0.00012335774999999998 0.84 AML other m 2023-09-18T03:32:31.78
IV.ATVO.HNE. ML:2.1 0.00013191049999999998 0.5488 AML other m 2023-09-18T03:32:39.64
IV.ATVO.HNN. ML:2.2 0.00015415465 0.4192 AML other m 2023-09-18T03:32:41.64
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