Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 18-09-2023 and time 11:24:04 (UTC) in region 3 km E Marradi (FI)

A magnitude ML 2.3 earthquake occured in region: 3 km E Marradi (FI), on

  • 18-09-2023 11:24:04 (UTC)
  • 18-09-2023 13:24:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0640, 11.6450 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
Marradi FI 3 3139 3139
Tredozio FC 8 1212 4351
Palazzuolo sul Senio FI 10 1154 5505
Portico e San Benedetto FC 12 756 6261
Premilcuore FC 14 799 7060
San Godenzo FI 15 1167 8227
Modigliana FC 16 4560 12787
Rocca San Casciano FC 16 1910 14697
Casola Valsenio RA 18 2617 17314

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km SW of Faenza (58541 inhabitants)
33 Km S of Imola (69797 inhabitants)
36 Km W of Forlì (117913 inhabitants)
45 Km NE of Firenze (382808 inhabitants)
48 Km E of Prato (191150 inhabitants)
48 Km W of Cesena (96758 inhabitants)
50 Km NE of Scandicci (50609 inhabitants)
54 Km SE of Bologna (386663 inhabitants)
59 Km SW of Ravenna (159116 inhabitants)
60 Km E of Pistoia (90315 inhabitants)
69 Km N of Arezzo (99543 inhabitants)
74 Km W of Rimini (147750 inhabitants)
86 Km S of Ferrara (133155 inhabitants)
86 Km SE of Modena (184973 inhabitants)
87 Km NE of Siena (53903 inhabitants)
95 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 2.3 2023-09-18
11:24:04		 44.0643 11.6453 8 2023-09-18
11:47:58		 Sala Sismica INGV-Roma 121182951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-18 11:24:04 ± 0.08
Latitude 44.0643 ± 0.0036
Longitude 11.6453 ± 0.0050
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 121182951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 380
Semi-minor axis of confidence ellipse (meter) 294
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 231
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 73
Number of defining phases 52
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.85705
Number of stations at which the event was observed 49
Number of stations from which data was used for origin computation 29
Magnitude information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 56
Type of magnitude ML
Reference to an origin 121182951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-18 11:47:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2023-09-18T11:26:01.19 3.0 undecidable manual Sn 0.44 0
GU.SATI.HHZ. 2023-09-18T11:25:37.00 3.0 undecidable manual Sn -0.4 0
IV.LRP.EHZ. 2023-09-18T11:25:30.49 3.0 undecidable manual Sg 3.68 0
SI.BOSI.HHZ. 2023-09-18T11:25:22.91 3.0 undecidable manual Sg 4.18 0
IV.MCRV.HHZ. 2023-09-18T11:25:17.98 3.0 undecidable manual Pg 7.98 0
IV.BAG8.EHZ. 2023-09-18T11:25:09.66 3.0 undecidable manual Sg 3.27 0
IV.TOLF.HHZ. 2023-09-18T11:25:09.95 3.0 undecidable manual Sg 2.77 0
IV.PTRJ.HHZ. 2023-09-18T11:25:04.83 3.0 undecidable manual Pg 5.2 0
IV.STAL.HHZ. 2023-09-18T11:24:43.09 3.0 undecidable manual Pn -1.77 0
SI.LUSI.HHZ. 2023-09-18T11:24:42.34 3.0 positive manual Pg 2.63 0
GU.GORR.HHZ. 2023-09-18T11:24:41.01 3.0 undecidable manual Pg 4.33 0
OX.MLN.HHZ. 2023-09-18T11:24:41.45 3.0 negative manual Pn -1.68 0
IV.MF5.EHZ. 2023-09-18T11:24:39.43 3.0 undecidable manual Pg 3.47 0
IV.MAGA.HHZ. 2023-09-18T11:24:39.07 3.0 positive manual Pg 0.83 0
ST.RONC.EHZ. 2023-09-18T11:24:38.85 3.0 undecidable manual Pn -2.03 0
ST.DOSS.HHZ. 2023-09-18T11:24:37.51 3.0 undecidable manual Pn -0.66 0
IV.CSP1.EHZ. 2023-09-18T11:24:35.73 3.0 positive manual P 2.66 0
IV.ATMI.HHZ. 2023-09-18T11:24:34.08 1.0 undecidable manual S 148 95.1381 50 0.89 17
IV.ROVR.HHZ. 2023-09-18T11:24:34.69 3.0 undecidable manual Pg -0.55 0
IV.ATPI.EHZ. 2023-09-18T11:24:32.87 1.0 undecidable manual S 138 91.1421 50 0.75 18
IV.CAFI.HHZ. 2023-09-18T11:24:31.60 1.0 undecidable manual S 162 85.5477 50 0.98 16
IV.ZOVE.EHZ. 2023-09-18T11:24:30.26 3.0 positive manual P -1.75 0
IV.BADI.EHZ. 2023-09-18T11:24:29.17 0.6 undecidable manual S 142 78.0663 50 0.56 40
IV.MGAB.HHZ. 2023-09-18T11:24:27.59 3.0 undecidable manual P -1.18 0
IV.CSNT.HHZ. 2023-09-18T11:24:27.28 0.6 undecidable manual S 204 71.4729 50 0.41 42
GU.POPM.HHZ. 2023-09-18T11:24:27.55 0.6 undecidable manual S 269 70.8735 50 0.84 36
IV.OSSC.HHZ. 2023-09-18T11:24:26.48 0.6 undecidable manual S 208 67.9764 50 0.54 41
IV.PARC.HHZ. 2023-09-18T11:24:25.82 0.6 undecidable manual S 134 66.1893 50 0.37 43
MN.VLC.HHZ. 2023-09-18T11:24:24.79 3.0 negative manual P 1.16 0
IV.CRMI.HHZ. 2023-09-18T11:24:24.35 0.6 undecidable manual S 241 60.9945 50 0.28 44
IV.PSL.EHZ. 2023-09-18T11:24:23.05 0.6 undecidable manual S 264 57.498 50 -0.09 46
IV.CRE.HHZ. 2023-09-18T11:24:22.60 0.6 undecidable manual S 154 55.2003 50 0.09 46
IV.ATMI.HHZ. 2023-09-18T11:24:21.52 0.6 positive manual P 148 95.1381 50 0.38 40
GU.MAIM.HHZ. 2023-09-18T11:24:21.32 1.0 undecidable manual P 260 93.6396 50 0.43 20
IV.ATPI.EHZ. 2023-09-18T11:24:20.22 0.3 undecidable manual P 138 91.1421 50 -0.3 62
IV.PIEI.HHZ. 2023-09-18T11:24:20.49 0.1 undecidable manual P 129 92.241 50 -0.2 84
IV.NARO.HHZ. 2023-09-18T11:24:19.97 0.6 undecidable manual P 124 90.1431 50 -0.4 41
IV.CAFI.HHZ. 2023-09-18T11:24:19.82 0.3 undecidable manual P 162 85.5477 50 0.17 64
IV.PE3.EHE. 2023-09-18T11:24:19.22 0.6 undecidable manual P 121 79.365 50 0.52 40
IV.FNVD.HHZ. 2023-09-18T11:24:19.65 0.6 undecidable manual S 286 43.1235 50 0.34 45
IV.MPPT.EHZ. 2023-09-18T11:24:19.94 1.0 undecidable manual S 255 45.8208 50 -0.09 24
IV.BADI.EHZ. 2023-09-18T11:24:18.21 0.3 undecidable manual P 142 78.0663 50 -0.28 64
GU.POPM.HHZ. 2023-09-18T11:24:18.27 0.6 undecidable manual P 269 70.8735 50 0.88 35
IV.MOCL.EHZ. 2023-09-18T11:24:17.63 1.0 undecidable manual S 260 37.629 50 -0.21 23
IV.IMOL.EHZ. 2023-09-18T11:24:17.65 0.6 undecidable manual S 13 33.6441 104 0.97 36
IV.CSNT.HHZ. 2023-09-18T11:24:17.44 0.1 undecidable manual P 204 71.4729 50 -0.05 91
IV.PARC.HHZ. 2023-09-18T11:24:16.00 0.3 undecidable manual P 134 66.1893 50 -0.67 58
IV.OSSC.HHZ. 2023-09-18T11:24:16.80 0.1 undecidable manual P 208 67.9764 50 -0.15 89
IV.CPGN.EHE. 2023-09-18T11:24:16.27 0.3 undecidable manual P 118 61.2942 50 0.35 65
IV.MTRZ.HHZ. 2023-09-18T11:24:15.86 1.0 undecidable manual S 328 32.6451 104 -0.49 22
IV.CRMI.HHZ. 2023-09-18T11:24:15.84 0.3 undecidable manual P 241 60.9945 50 -0.03 70
IV.RUFI.EHZ. 2023-09-18T11:24:14.50 0.3 undecidable manual S 203 27.3504 106 -0.07 73
IV.CRE.HHZ. 2023-09-18T11:24:14.28 0.1 positive manual P 154 55.2003 50 -0.69 79
IV.BOSL.HHZ. 2023-09-18T11:24:14.36 0.3 undecidable manual S 236 26.2515 107 0.17 72
IV.PSL.EHZ. 2023-09-18T11:24:14.97 0.1 undecidable manual P 264 57.498 50 -0.37 87
IV.SFI.EHZ. 2023-09-18T11:24:13.20 0.3 undecidable manual S 138 23.9538 109 -0.23 71
IV.MPPT.EHZ. 2023-09-18T11:24:13.09 0.3 undecidable manual P 255 45.8208 50 -0.45 65
IV.SEI.HHZ. 2023-09-18T11:24:13.01 0.3 undecidable manual S 267 22.8549 109 -0.08 74
IV.RINC.EHZ. 2023-09-18T11:24:12.66 0.3 undecidable manual S 189 19.9689 112 0.52 67
IV.VISG.HHZ. 2023-09-18T11:24:12.80 0.6 undecidable manual S 310 21.7671 110 0.08 49
IT.FIE.HGE. 2023-09-18T11:24:12.22 0.1 undecidable manual P 225 40.0266 50 -0.42 89
IV.FNVD.HHZ. 2023-09-18T11:24:12.85 0.3 undecidable manual P 286 43.1235 50 -0.27 68
IV.VMGN.HHE. 2023-09-18T11:24:11.01 0.3 undecidable manual S 216 15.1737 118 0.39 70
IV.MTRZ.HHZ. 2023-09-18T11:24:11.66 0.1 positive manual P 328 32.6451 104 0.25 93
IV.MOCL.EHZ. 2023-09-18T11:24:11.81 0.1 positive manual P 260 37.629 50 -0.46 88
IV.IMOL.EHZ. 2023-09-18T11:24:11.97 0.1 undecidable manual P 13 33.6441 104 0.37 91
IV.RUFI.EHZ. 2023-09-18T11:24:10.17 0.1 undecidable manual P 203 27.3504 106 -0.21 95
IV.BOSL.HHZ. 2023-09-18T11:24:10.14 0.1 positive manual P 236 26.2515 107 -0.02 99
IV.SEI.HHZ. 2023-09-18T11:24:09.33 0.1 positive manual P 267 22.8549 109 -0.2 96
IV.SFI.EHZ. 2023-09-18T11:24:09.41 0.1 positive manual P 138 23.9538 109 -0.32 93
IV.RINC.EHZ. 2023-09-18T11:24:09.00 0.1 positive manual P 189 19.9689 112 0.02 100
IV.VISG.HHZ. 2023-09-18T11:24:09.11 0.1 undecidable manual P 310 21.7671 110 -0.21 96
IV.VMGN.HHE. 2023-09-18T11:24:08.31 0.1 undecidable manual P 216 15.1737 118 0.2 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:2.4 0.00173 1.76 AML other m 2023-09-18T11:24:12.90
IV.VISG.HHN. ML:2.4 0.0017000000000000001 1.84 AML other m 2023-09-18T11:24:13.98
IV.SFI.HNN. ML:2.6 0.0023499999999999997 0.66 AML other m 2023-09-18T11:24:13.36
IV.SFI.EHN. ML:2.6 0.002375 0.66 AML other m 2023-09-18T11:24:13.37
IV.SEI.HHE. ML:2.9 0.005585 0.36 AML other m 2023-09-18T11:24:13.81
IV.SFI.HNE. ML:2.5 0.0022 0.22 AML other m 2023-09-18T11:24:13.77
IV.SFI.EHE. ML:2.5 0.00218 0.24 AML other m 2023-09-18T11:24:13.77
IV.BOSL.HHE. ML:2.1 0.0007255 1.08 AML other m 2023-09-18T11:24:14.09
IV.SEI.HHN. ML:3.0 0.0068449999999999995 0.44 AML other m 2023-09-18T11:24:14.66
IV.RUFI.EHE. ML:1.9 0.000474 0.34 AML other m 2023-09-18T11:24:14.74
IV.RUFI.EHN. ML:2.2 0.000992 0.2 AML other m 2023-09-18T11:24:14.85
IV.BOSL.HHN. ML:2.3 0.0011785 1.78 AML other m 2023-09-18T11:24:14.05
IV.RINC.EHE. ML:2.4 0.00182 0.7 AML other m 2023-09-18T11:24:16.22
IV.RINC.EHN. ML:2.5 0.00259 0.52 AML other m 2023-09-18T11:24:16.37
IV.MOCL.EHN. ML:2.9 0.00315 0.2 AML other m 2023-09-18T11:24:18.09
IV.MOCL.EHE. ML:2.6 0.001715 1.52 AML other m 2023-09-18T11:24:18.05
IV.IMOL.EHE. ML:2.5 0.0014199999999999998 0.14 AML other m 2023-09-18T11:24:19.20
IV.IMOL.HNE. ML:3.0 0.004070000000000001 0.14 AML other m 2023-09-18T11:24:19.57
IV.IMOL.HNN. ML:3.0 0.004055 0.48 AML other m 2023-09-18T11:24:19.64
IV.IMOL.EHN. ML:2.3 0.0009665 0.84 AML other m 2023-09-18T11:24:19.93
IV.MTRZ.HHN. ML:2.7 0.0023 0.38 AML other m 2023-09-18T11:24:20.19
IV.MTRZ.HNN. ML:2.7 0.0021950000000000003 0.38 AML other m 2023-09-18T11:24:20.20
IV.MPPT.EHN. ML:2.2 0.0004515 0.54 AML other m 2023-09-18T11:24:21.41
IV.FNVD.HHN. ML:1.9 0.000264 1.64 AML other m 2023-09-18T11:24:23.10
IV.CRE.HHN. ML:3.0 0.0023049999999999998 0.22 AML other m 2023-09-18T11:24:23.10
IV.FNVD.HHE. ML:2.4 0.0007869999999999999 0.96 AML other m 2023-09-18T11:24:23.73
IV.CRE.HHE. ML:2.4 0.0006655 0.24 AML other m 2023-09-18T11:24:23.65
IV.MPPT.EHE. ML:2.1 0.0003935 1.32 AML other m 2023-09-18T11:24:23.07
IV.MTRZ.HHE. ML:2.6 0.001835 1.42 AML other m 2023-09-18T11:24:23.88
IV.MTRZ.HNE. ML:2.6 0.0017850000000000001 1.4 AML other m 2023-09-18T11:24:23.18
IV.CRMI.HHN. ML:2.3 0.0004395 1.5 AML other m 2023-09-18T11:24:25.77
IV.CRMI.HHE. ML:2.1 0.000264 0.22 AML other m 2023-09-18T11:24:25.15
IV.PARC.HHE. ML:2.0 0.000191 0.86 AML other m 2023-09-18T11:24:26.49
IV.OSSC.HHE. ML:2.5 0.000521 0.54 AML other m 2023-09-18T11:24:27.02
IV.OSSC.HHN. ML:2.3 0.0003715 0.2 AML other m 2023-09-18T11:24:27.47
GU.POPM.HHE. ML:2.2 0.000265 0.2 AML other m 2023-09-18T11:24:28.17
IV.CSNT.HHN. ML:2.0 0.0001735 0.44 AML other m 2023-09-18T11:24:30.28
GU.POPM.HHN. ML:2.4 0.0003635 1.18 AML other m 2023-09-18T11:24:30.26
IV.PARC.HHN. ML:2.1 0.000244 0.4 AML other m 2023-09-18T11:24:31.58
IV.CSNT.HHE. ML:2.1 0.00020500000000000002 0.56 AML other m 2023-09-18T11:24:31.60
IV.BADI.EHE. ML:2.2 0.00020700000000000002 0.4 AML other m 2023-09-18T11:24:31.65
IV.BADI.EHN. ML:2.2 0.000228 0.5 AML other m 2023-09-18T11:24:33.19
IV.CAFI.HHE. ML:2.3 0.0002565 0.52 AML other m 2023-09-18T11:24:35.27
IV.ATPI.EHE. ML:2.1 0.00014749999999999998 0.4 AML other m 2023-09-18T11:24:35.92
IV.CAFI.HHN. ML:2.0 0.00013800000000000002 0.42 AML other m 2023-09-18T11:24:36.80
IV.ATPI.EHN. ML:2.1 0.00014399999999999998 1.14 AML other m 2023-09-18T11:24:38.03
GU.GSCL.HHN. ML:1.9 0.00009305 0.82 AML other m 2023-09-18T11:24:39.16
IV.ATMI.HHN. ML:2.5 0.00035650000000000005 0.46 AML other m 2023-09-18T11:24:39.86
GU.MAIM.HHN. ML:1.8 0.00007405000000000001 0.52 AML other m 2023-09-18T11:24:40.22
IV.PIEI.HHN. ML:1.8 0.00007264999999999999 0.9 AML other m 2023-09-18T11:24:40.51
IV.PIEI.HHE. ML:1.9 0.00009715 0.28 AML other m 2023-09-18T11:24:41.82
GU.GSCL.HHE. ML:2.1 0.0001365 0.6 AML other m 2023-09-18T11:24:41.80
GU.MAIM.HHE. ML:1.8 0.00006720000000000001 1.04 AML other m 2023-09-18T11:24:42.31
IV.FRON.EHN. ML:2.2 0.00014600000000000003 1.4 AML other m 2023-09-18T11:24:45.00
IV.ATMI.HHE. ML:2.5 0.000317 1.28 AML other m 2023-09-18T11:24:45.77
IV.FRON.EHE. ML:2.0 0.00008824999999999999 0.48 AML other m 2023-09-18T11:24:47.62
IV.ATFO.HHN. ML:2.1 0.00011999999999999999 1.42 AML other m 2023-09-18T11:24:47.82
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