Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 19-09-2023 and time 00:55:46 (UTC) in region 5 km E Marradi (FI)

A magnitude ML 1.9 earthquake occured in region: 5 km E Marradi (FI), on

  • 19-09-2023 00:55:46 (UTC)
  • 19-09-2023 02:55:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0650, 11.6750 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
Marradi FI 5 3139 3139
Tredozio FC 6 1212 4351
Portico e San Benedetto FC 10 756 5107
Palazzuolo sul Senio FI 12 1154 6261
Premilcuore FC 13 799 7060
Rocca San Casciano FC 13 1910 8970
Modigliana FC 14 4560 13530
San Godenzo FI 16 1167 14697
Casola Valsenio RA 18 2617 17314
Dovadola FC 18 1653 18967
Brisighella RA 19 7639 26606

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Faenza (58541 inhabitants)
32 Km S of Imola (69797 inhabitants)
34 Km SW of Forlì (117913 inhabitants)
46 Km W of Cesena (96758 inhabitants)
47 Km NE of Firenze (382808 inhabitants)
51 Km E of Prato (191150 inhabitants)
52 Km NE of Scandicci (50609 inhabitants)
55 Km SE of Bologna (386663 inhabitants)
57 Km SW of Ravenna (159116 inhabitants)
62 Km E of Pistoia (90315 inhabitants)
69 Km N of Arezzo (99543 inhabitants)
71 Km W of Rimini (147750 inhabitants)
86 Km S of Ferrara (133155 inhabitants)
87 Km NE of Siena (53903 inhabitants)
88 Km SE of Modena (184973 inhabitants)
97 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 1.9 2023-09-19
00:55:46		 44.0652 11.6753 7 2023-09-19
01:07:37		 Sala Sismica INGV-Roma 121213551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-19 00:55:46 ± 0.07
Latitude 44.0652 ± 0.0036
Longitude 11.6753 ± 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 121213551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 376
Semi-minor axis of confidence ellipse (meter) 146
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 129
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) 80
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.02608
Epicentral distance of station farthest from the epicenter (degree) 0.76532
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 121213551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-19 01:07:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRMI.HHZ. 2023-09-19T00:56:06.81 0.3 undecidable manual S 242 63.0924 50 0.32 64
IV.PSL.EHZ. 2023-09-19T00:56:05.69 0.3 undecidable manual S 264 59.8956 50 0.06 68
IV.CRE.HHZ. 2023-09-19T00:56:03.90 0.3 undecidable manual S 156 54.2013 50 -0.21 66
IV.CAFI.HHZ. 2023-09-19T00:56:01.35 0.6 undecidable manual P 164 84.9483 50 0.08 43
IV.MOCL.EHE. 2023-09-19T00:56:00.07 0.3 undecidable manual S 261 40.0266 99 -0.19 68
IV.CRMI.HHZ. 2023-09-19T00:55:57.95 0.3 undecidable manual P 242 63.0924 50 0.04 68
IV.PSL.EHZ. 2023-09-19T00:55:57.06 0.6 undecidable manual P 264 59.8956 50 -0.35 42
IV.RUFI.EHZ. 2023-09-19T00:55:56.45 0.3 undecidable manual S 208 28.4493 103 0.12 71
IV.BOSL.HHZ. 2023-09-19T00:55:56.57 0.6 undecidable manual S 238 28.2495 103 0.31 45
IV.SEI.HHZ. 2023-09-19T00:55:55.19 0.3 undecidable manual S 267 25.2525 105 -0.07 72
IV.CRE.HHZ. 2023-09-19T00:55:55.87 0.3 undecidable manual P 156 54.2013 50 -0.67 58
IV.SFI.EHZ. 2023-09-19T00:55:54.51 0.3 undecidable manual S 142 22.4553 106 0.2 70
IV.BRSN.EHZ. 2023-09-19T00:55:54.71 0.3 negative manual P 53 40.3263 99 0.33 66
IV.VISG.HHN. 2023-09-19T00:55:54.69 0.3 undecidable manual S 306 23.5542 106 0 73
IV.RINC.EHZ. 2023-09-19T00:55:54.14 0.3 undecidable manual S 195 20.5683 108 0.46 67
IV.MOCL.EHE. 2023-09-19T00:55:53.74 0.6 undecidable manual P 261 40.0266 99 -0.57 42
IV.IMOL.EHZ. 2023-09-19T00:55:53.39 0.1 undecidable manual P 9 33.1446 101 0.44 88
IV.VMGN.HHZ. 2023-09-19T00:55:53.01 0.3 undecidable manual S 223 16.7721 112 0.58 65
IV.MTRZ.HHE. 2023-09-19T00:55:53.36 0.3 undecidable manual P 324 33.9438 101 0.24 68
IT.FAZ.HNN. 2023-09-19T00:55:53.01 0.3 undecidable manual P 33 31.0467 102 0.47 65
IV.SEI.HHZ. 2023-09-19T00:55:51.13 0.3 positive manual P 267 25.2525 105 -0.29 69
IV.RUFI.EHZ. 2023-09-19T00:55:51.77 0.1 positive manual P 208 28.4493 103 -0.27 92
IV.BOSL.HHZ. 2023-09-19T00:55:51.89 0.3 undecidable manual P 238 28.2495 103 -0.11 71
IT.MOG.HNE. 2023-09-19T00:55:51.82 0.6 undecidable manual S 32 13.7751 116 0.34 46
IV.RINC.EHZ. 2023-09-19T00:55:50.55 0.1 positive manual P 195 20.5683 108 0.04 97
IV.SFI.EHZ. 2023-09-19T00:55:50.70 0.1 positive manual P 142 22.4553 106 -0.18 94
IV.VISG.HHN. 2023-09-19T00:55:50.80 0.1 undecidable manual P 306 23.5542 106 -0.3 92
IV.VMGN.HHZ. 2023-09-19T00:55:49.94 0.1 undecidable manual P 223 16.7721 112 0.15 96
IT.MOG.HNE. 2023-09-19T00:55:49.20 0.1 undecidable manual P 32 13.7751 116 -0.05 98
IT.MRR.HGE. 2023-09-19T00:55:49.23 0.6 undecidable manual S 269 5.7942 139 0 50
IV.LMD.HHE. 2023-09-19T00:55:48.10 0.6 undecidable manual S 62 2.8971 156 -0.59 44
IT.MRR.HGE. 2023-09-19T00:55:47.91 0.1 undecidable manual P 269 5.7942 139 -0.03 100
IV.LMD.HHE. 2023-09-19T00:55:47.24 0.1 undecidable manual P 62 2.8971 156 -0.39 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VMGN.HHN. ML:1.7 0.000528 0.26 AML other m 2023-09-19T00:55:53.41
IV.VMGN.HHE. ML:1.8 0.00059 0.34 AML other m 2023-09-19T00:55:53.41
IV.RINC.EHN. ML:1.8 0.0004290000000000001 0.28 AML other m 2023-09-19T00:55:54.36
IV.SFI.EHE. ML:1.9 0.0005669999999999999 0.34 AML other m 2023-09-19T00:55:54.53
IV.SFI.HNE. ML:1.9 0.000561 0.34 AML other m 2023-09-19T00:55:54.53
IV.VISG.HHN. ML:1.9 0.000524 0.82 AML other m 2023-09-19T00:55:54.93
IV.SFI.HNN. ML:1.8 0.000468 0.5 AML other m 2023-09-19T00:55:55.09
IV.SFI.EHN. ML:1.8 0.000393 0.52 AML other m 2023-09-19T00:55:55.35
IV.VISG.HHE. ML:1.8 0.000461 0.38 AML other m 2023-09-19T00:55:55.31
IV.SEI.HHE. ML:2.1 0.0007585 1.08 AML other m 2023-09-19T00:55:55.96
IV.RINC.EHE. ML:1.8 0.000505 0.24 AML other m 2023-09-19T00:55:55.73
IV.SEI.HHN. ML:2.3 0.001375 0.5 AML other m 2023-09-19T00:55:56.93
IV.RUFI.EHN. ML:1.9 0.0004255 0.32 AML other m 2023-09-19T00:55:56.72
IV.RUFI.EHE. ML:1.3 0.000114 0.46 AML other m 2023-09-19T00:55:56.72
IV.MOCL.EHN. ML:1.8 0.0002255 1.64 AML other m 2023-09-19T00:56:00.17
IV.MOCL.EHE. ML:1.8 0.0002155 0.22 AML other m 2023-09-19T00:56:00.18
IV.IMOL.HNN. ML:2.1 0.0005915 0.18 AML other m 2023-09-19T00:56:01.00
IV.MTRZ.HNE. ML:2.1 0.000593 0.54 AML other m 2023-09-19T00:56:01.28
IV.MTRZ.HHE. ML:2.1 0.0005895000000000001 0.56 AML other m 2023-09-19T00:56:01.28
IV.IMOL.HNE. ML:2.3 0.000798 0.26 AML other m 2023-09-19T00:56:01.34
IV.MTRZ.HNN. ML:2.2 0.000675 0.44 AML other m 2023-09-19T00:56:01.56
IV.MTRZ.HHN. ML:2.2 0.0007245 0.46 AML other m 2023-09-19T00:56:01.56
IV.BRSN.EHE. ML:2.0 0.0003355 1.38 AML other m 2023-09-19T00:56:04.14
IV.CRE.HHN. ML:2.0 0.0002475 0.2 AML other m 2023-09-19T00:56:04.23
IV.CRE.HHE. ML:1.9 0.0001885 0.64 AML other m 2023-09-19T00:56:04.42
IV.BRSN.EHN. ML:2.1 0.000439 0.68 AML other m 2023-09-19T00:56:04.63
IV.CAFI.HHN. ML:1.5 0.0000419 1.22 AML other m 2023-09-19T00:56:16.85
IV.CAFI.HHE. ML:1.6 0.00005205 1.46 AML other m 2023-09-19T00:56:17.01
IV.CPGN.EHN. ML:1.6 0.00008060000000000001 0.54 AML other m 2023-09-19T00:56:20.73
IV.CPGN.EHE. ML:1.6 0.00009365 0.58 AML other m 2023-09-19T00:56:20.63
IV.MURB.HHN. ML:2.0 0.0000779 0.44 AML other m 2023-09-19T00:56:25.13
IV.MURB.HHE. ML:1.9 0.0000671 0.42 AML other m 2023-09-19T00:56:29.00
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