Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 19-09-2023 and time 22:22:28 (UTC) in region 3 km E Marradi (FI)

A magnitude ML 2.5 earthquake occured in region: 3 km E Marradi (FI), on

  • 19-09-2023 22:22:28 (UTC)
  • 20-09-2023 00:22:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0850, 11.6530 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 7 1212 4351
Palazzuolo sul Senio FI 9 1154 5505
Portico e San Benedetto FC 12 756 6261
Modigliana FC 14 4560 10821
Rocca San Casciano FC 15 1910 12731
Premilcuore FC 16 799 13530
Casola Valsenio RA 16 2617 16147
San Godenzo FI 18 1167 17314
Brisighella RA 18 7639 24953
Castel del Rio BO 19 1246 26199
Dovadola FC 19 1653 27852

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SW of Faenza (58541 inhabitants)
30 Km S of Imola (69797 inhabitants)
35 Km W of Forlì (117913 inhabitants)
47 Km NE of Firenze (382808 inhabitants)
48 Km W of Cesena (96758 inhabitants)
50 Km E of Prato (191150 inhabitants)
52 Km SE of Bologna (386663 inhabitants)
52 Km NE of Scandicci (50609 inhabitants)
57 Km SW of Ravenna (159116 inhabitants)
61 Km E of Pistoia (90315 inhabitants)
71 Km N of Arezzo (99543 inhabitants)
73 Km W of Rimini (147750 inhabitants)
84 Km S of Ferrara (133155 inhabitants)
85 Km SE of Modena (184973 inhabitants)
89 Km NE of Siena (53903 inhabitants)
96 Km E of Lucca (89046 inhabitants)
99 Km SE of Carpi (70699 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 2.5 2023-09-19
22:22:28		 44.0848 11.6532 8 2023-09-19
22:31:59		 Sala Sismica INGV-Roma 121247161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-19 22:22:28 ± 0.09
Latitude 44.0848 ± 0.0045
Longitude 11.6532 ± 0.0063
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121247161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 523
Semi-minor axis of confidence ellipse (meter) 308
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 36
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
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 65
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51261
Number of stations at which the event was observed 49
Number of stations from which data was used for origin computation 15
Magnitude information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations 76
Type of magnitude ML
Reference to an origin 121247161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-19 22:31:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GATE.HHZ. 2023-09-19T22:24:17.00 3.0 undecidable manual Sg 11.25 0
IV.AGLI.HHZ. 2023-09-19T22:24:10.55 3.0 undecidable manual Sg 6.24 0
IV.PAOL.HHZ. 2023-09-19T22:24:09.69 3.0 undecidable manual Sn -1.37 0
ST.OZOL.EHZ. 2023-09-19T22:23:40.65 3.0 undecidable manual Sg 2.65 0
OX.MLN.HHZ. 2023-09-19T22:23:33.35 3.0 undecidable manual Sn -0.33 0
IV.PAOL.HHZ. 2023-09-19T22:23:31.68 3.0 undecidable manual Pn 5.49 0
OT.OT17.EHZ. 2023-09-19T22:23:30.78 3.0 positive manual Pn 5.9 0
IV.ROVR.HHZ. 2023-09-19T22:23:22.39 3.0 undecidable manual S 2.56 0
IV.VVLD.HHZ. 2023-09-19T22:23:17.49 3.0 undecidable manual Pg 6.28 0
4P.IT02A.HHZ. 2023-09-19T22:23:15.15 3.0 positive manual Pn 1.69 0
IV.PLMA.HHZ. 2023-09-19T22:23:12.45 3.0 undecidable manual S 1.15 0
NI.VINO.HHZ. 2023-09-19T22:23:08.86 3.0 positive manual Pn -0.18 0
ST.RONC.EHZ. 2023-09-19T22:23:07.02 3.0 negative manual Pg 3.93 0
IV.FDMO.HHZ. 2023-09-19T22:22:59.46 3.0 positive manual P 4.19 0
IV.PIEI.HHZ. 2023-09-19T22:22:58.50 3.0 undecidable manual S -0.25 0
IV.ATPI.EHZ. 2023-09-19T22:22:58.75 3.0 undecidable manual S 0.37 0
IV.CSP1.EHZ. 2023-09-19T22:22:57.84 3.0 undecidable manual P 2.22 0
IV.BADI.EHZ. 2023-09-19T22:22:54.41 3.0 undecidable manual S -0.03 0
IV.ASSB.HHZ. 2023-09-19T22:22:53.82 3.0 positive manual P 1.43 0
IV.CSNT.HHZ. 2023-09-19T22:22:52.17 3.0 undecidable manual S 0.02 0
GU.POPM.HHZ. 2023-09-19T22:22:51.96 3.0 undecidable manual S 0.13 0
IV.MGAB.HHZ. 2023-09-19T22:22:51.79 3.0 positive manual P 0.25 0
IV.OSSC.HHZ. 2023-09-19T22:22:50.99 3.0 undecidable manual S -0.11 0
IV.TRIF.CHZ. 2023-09-19T22:22:49.48 3.0 undecidable manual P -0.47 0
IV.MURB.HHZ. 2023-09-19T22:22:49.44 3.0 undecidable manual P 0.36 0
IV.CRE.HHZ. 2023-09-19T22:22:47.27 0.6 undecidable manual S 155 56.8986 50 0.68 39
IV.MPAG.EHZ. 2023-09-19T22:22:46.24 3.0 positive manual P -0.88 0
IV.ATVO.HHZ. 2023-09-19T22:22:45.99 3.0 positive manual P -0.37 0
IV.PIEI.HHZ. 2023-09-19T22:22:45.18 3.0 positive manual P -0.39 0
IV.ATMI.HHZ. 2023-09-19T22:22:45.84 3.0 negative manual P -0.15 0
IV.ATPI.EHZ. 2023-09-19T22:22:44.61 3.0 undecidable manual P -0.75 0
IV.NARO.HHZ. 2023-09-19T22:22:44.50 3.0 undecidable manual P -0.74 0
IV.CAFI.HHZ. 2023-09-19T22:22:44.23 3.0 negative manual P -0.1 0
IV.CSNT.HHZ. 2023-09-19T22:22:43.57 3.0 negative manual P 1.71 0
IV.OSSC.HHZ. 2023-09-19T22:22:41.09 3.0 negative manual P -0.18 0
IV.MOCL.EHZ. 2023-09-19T22:22:41.55 0.6 undecidable manual S 257 38.7279 50 -0.18 47
GU.POPM.HHZ. 2023-09-19T22:22:40.34 3.0 positive manual P -1.34 0
IV.PARC.HHZ. 2023-09-19T22:22:40.48 3.0 negative manual P -0.71 0
IV.CRMI.HHZ. 2023-09-19T22:22:39.96 3.0 undecidable manual P -0.08 0
IV.RUFI.EHZ. 2023-09-19T22:22:38.99 0.6 undecidable manual S 203 29.6481 105 0.03 49
IV.CRE.HHZ. 2023-09-19T22:22:38.54 0.1 undecidable manual P 155 56.8986 50 -0.31 88
IV.PSL.EHZ. 2023-09-19T22:22:38.90 3.0 undecidable manual P -0.55 0
IV.BOSL.HHZ. 2023-09-19T22:22:38.80 0.6 undecidable manual S 233 28.0497 106 0.38 46
IV.SEI.HHZ. 2023-09-19T22:22:37.17 0.6 undecidable manual S 262 23.754 109 0.19 48
IV.BRSN.EHZ. 2023-09-19T22:22:37.29 3.0 positive manual P 0.07 0
IV.SFI.EHZ. 2023-09-19T22:22:37.74 0.6 undecidable manual S 142 25.2525 108 0.25 47
IV.FNVD.HHZ. 2023-09-19T22:22:36.67 0.1 positive manual P 282 43.2234 50 -0.07 95
IV.VISG.HHZ. 2023-09-19T22:22:36.44 0.6 undecidable manual S 304 20.868 111 0.37 46
IV.MPPT.EHZ. 2023-09-19T22:22:36.96 0.1 undecidable manual P 253 47.1195 50 -0.37 88
IV.VMGN.HHZ. 2023-09-19T22:22:35.50 0.6 undecidable manual S 214 17.3715 115 0.57 44
IV.MOCL.EHZ. 2023-09-19T22:22:35.75 0.1 positive manual P 257 38.7279 50 -0.29 91
IV.MTRZ.HHZ. 2023-09-19T22:22:35.27 0.1 undecidable manual P 324 31.1466 105 0.55 87
IV.IMOL.EHZ. 2023-09-19T22:22:35.50 3.0 positive manual P -0.15 0
IV.BOSL.HHZ. 2023-09-19T22:22:34.16 0.1 positive manual P 233 28.0497 106 0.03 98
IV.RUFI.EHZ. 2023-09-19T22:22:34.26 1.0 undecidable manual P 203 29.6481 105 -0.19 24
IV.RINC.EHZ. 2023-09-19T22:22:33.17 0.1 positive manual P 190 22.2555 110 0.13 97
IV.SEI.HHZ. 2023-09-19T22:22:33.17 0.1 positive manual P 262 23.754 109 -0.13 97
IV.SFI.EHZ. 2023-09-19T22:22:33.54 0.1 undecidable manual P 142 25.2525 108 -0.06 98
IV.VMGN.HHZ. 2023-09-19T22:22:32.36 0.1 positive manual P 214 17.3715 115 0.24 96
IV.VISG.HHZ. 2023-09-19T22:22:32.73 0.1 positive manual P 304 20.868 111 -0.05 99
IT.MOG.HNE. 2023-09-19T22:22:31.62 0.1 undecidable manual P 44 13.0758 122 0.25 96
IT.MRR.HGN. 2023-09-19T22:22:31.02 0.1 undecidable manual S 240 4.5954 151 -0.5 93
IV.LMD.HHZ. 2023-09-19T22:22:31.15 0.6 undecidable manual S 101 4.3956 152 -0.34 48
IV.LMD.HHZ. 2023-09-19T22:22:29.99 0.1 undecidable manual P 101 4.3956 152 -0.14 100
IT.MRR.HGN. 2023-09-19T22:22:29.99 0.1 negative manual P 240 4.5954 151 -0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VMGN.HHE. ML:2.5 0.0028000000000000004 0.42 AML other m 2023-09-19T22:22:35.89
IV.SEI.HHE. ML:3.0 0.00605 0.5 AML other m 2023-09-19T22:22:37.48
IV.SEI.HHN. ML:3.3 0.012350000000000002 0.3 AML other m 2023-09-19T22:22:37.53
IV.VMGN.HHN. ML:2.6 0.0035549999999999996 0.32 AML other m 2023-09-19T22:22:37.83
IV.SFI.EHE. ML:2.7 0.00281 1.62 AML other m 2023-09-19T22:22:37.89
IV.SFI.HNE. ML:2.7 0.002805 1.62 AML other m 2023-09-19T22:22:37.89
IV.RINC.EHE. ML:2.8 0.00417 0.38 AML other m 2023-09-19T22:22:38.63
IV.VISG.HHN. ML:2.4 0.0019049999999999998 0.34 AML other m 2023-09-19T22:22:38.43
IV.SFI.HNN. ML:2.5 0.00189 1.22 AML other m 2023-09-19T22:22:38.25
IV.SFI.EHN. ML:2.5 0.0019049999999999998 1.22 AML other m 2023-09-19T22:22:38.25
IV.BOSL.HHN. ML:2.4 0.0013555000000000002 0.3 AML other m 2023-09-19T22:22:39.19
IV.BOSL.HHE. ML:2.3 0.0010685 0.7 AML other m 2023-09-19T22:22:39.21
IV.RUFI.EHN. ML:2.7 0.002315 0.34 AML other m 2023-09-19T22:22:39.21
IV.RUFI.EHE. ML:2.2 0.0006979999999999999 0.3 AML other m 2023-09-19T22:22:39.24
IV.VISG.HHE. ML:2.2 0.0013199999999999998 0.36 AML other m 2023-09-19T22:22:39.97
IV.RINC.EHN. ML:2.8 0.0043 0.5 AML other m 2023-09-19T22:22:40.54
IV.MOCL.EHE. ML:2.5 0.0010955 0.18 AML other m 2023-09-19T22:22:42.12
IV.MTRZ.HHE. ML:2.8 0.002875 0.84 AML other m 2023-09-19T22:22:43.09
IV.MTRZ.HNE. ML:2.8 0.0027 0.84 AML other m 2023-09-19T22:22:43.09
IV.MOCL.EHN. ML:2.4 0.0010215 0.84 AML other m 2023-09-19T22:22:44.49
IV.FNVD.HHE. ML:2.7 0.0016950000000000001 0.42 AML other m 2023-09-19T22:22:45.72
IV.BRSN.EHE. ML:2.9 0.00264 0.44 AML other m 2023-09-19T22:22:46.56
IV.MTRZ.HHN. ML:2.8 0.00327 0.6 AML other m 2023-09-19T22:22:46.45
IV.MTRZ.HNN. ML:2.8 0.003125 0.6 AML other m 2023-09-19T22:22:46.45
IV.FNVD.HHN. ML:2.0 0.00035499999999999996 0.34 AML other m 2023-09-19T22:22:47.05
IV.CRE.HHN. ML:3.1 0.0025999999999999994 0.22 AML other m 2023-09-19T22:22:47.70
IV.IMOL.EHN. ML:2.4 0.0012335 0.34 AML other m 2023-09-19T22:22:47.48
IV.MPPT.EHE. ML:2.3 0.0005765 1.16 AML other m 2023-09-19T22:22:47.66
IV.CRE.HHE. ML:2.8 0.0013900000000000002 0.28 AML other m 2023-09-19T22:22:47.83
IV.MPPT.EHN. ML:2.2 0.00054 0.56 AML other m 2023-09-19T22:22:48.88
IV.CRMI.HHN. ML:2.1 0.00025 0.3 AML other m 2023-09-19T22:22:49.10
IV.IMOL.EHE. ML:2.4 0.0012395000000000002 0.94 AML other m 2023-09-19T22:22:50.55
IV.IMOL.HNE. ML:2.7 0.00236 0.44 AML other m 2023-09-19T22:22:50.43
IV.IMOL.HNN. ML:2.8 0.002875 1.44 AML other m 2023-09-19T22:22:50.95
IV.OSSC.HHE. ML:2.5 0.000597 0.2 AML other m 2023-09-19T22:22:51.71
IV.BRSN.EHN. ML:2.9 0.0026050000000000005 0.42 AML other m 2023-09-19T22:22:52.31
IV.BRSN.HNN. ML:2.9 0.00257 0.42 AML other m 2023-09-19T22:22:52.31
GU.POPM.HHN. ML:2.2 0.00028300000000000005 0.34 AML other m 2023-09-19T22:22:53.12
IV.CRMI.HHE. ML:2.0 0.000179 0.34 AML other m 2023-09-19T22:22:53.67
IV.PARC.HHN. ML:2.2 0.0003095 1.32 AML other m 2023-09-19T22:22:54.94
IV.CSNT.HHE. ML:2.4 0.0003745 1.18 AML other m 2023-09-19T22:22:55.23
IV.CSNT.HHN. ML:2.5 0.0004505 0.6 AML other m 2023-09-19T22:22:55.25
GU.POPM.HHE. ML:2.1 0.00020850000000000003 0.32 AML other m 2023-09-19T22:22:55.57
IV.BRSN.HNE. ML:2.9 0.00296 0.54 AML other m 2023-09-19T22:22:55.61
IV.OSSC.HHN. ML:2.6 0.000689 1.24 AML other m 2023-09-19T22:22:56.06
IV.PARC.HHE. ML:2.2 0.00028349999999999995 0.34 AML other m 2023-09-19T22:22:57.26
IV.BADI.EHE. ML:2.4 0.000395 1.64 AML other m 2023-09-19T22:22:58.93
IV.CAFI.HHN. ML:2.3 0.0002485 1.08 AML other m 2023-09-19T22:23:00.77
IV.ATPI.EHE. ML:2.2 0.00016 0.32 AML other m 2023-09-19T22:23:00.94
IV.CAFI.HHE. ML:2.6 0.0004555 0.66 AML other m 2023-09-19T22:23:01.71
IV.ATMI.HHE. ML:2.7 0.000501 1.4 AML other m 2023-09-19T22:23:02.92
IV.ATVO.HHE. ML:2.6 0.0004195 0.38 AML other m 2023-09-19T22:23:03.20
IV.NARO.HHE. ML:2.1 0.0001385 0.5 AML other m 2023-09-19T22:23:03.70
IV.ATMI.HHN. ML:2.7 0.0005819999999999999 1.58 AML other m 2023-09-19T22:23:03.06
IV.ATPI.EHN. ML:2.2 0.000168 0.36 AML other m 2023-09-19T22:23:04.44
IV.BADI.EHN. ML:2.3 0.000292 0.88 AML other m 2023-09-19T22:23:05.54
IV.NARO.HHN. ML:2.1 0.00014600000000000003 1.4 AML other m 2023-09-19T22:23:05.97
IV.TRIF.CHE. ML:2.0 0.00006495 0.22 AML other m 2023-09-19T22:23:07.27
IV.TRIF.CHN. ML:2.0 0.00006544999999999999 0.26 AML other m 2023-09-19T22:23:07.64
IV.ATVO.HHN. ML:2.4 0.00026450000000000003 0.6 AML other m 2023-09-19T22:23:08.33
IV.PIEI.HHE. ML:2.1 0.00015200000000000004 0.48 AML other m 2023-09-19T22:23:08.32
IV.MPAG.EHE. ML:2.3 0.00021 0.38 AML other m 2023-09-19T22:23:08.49
IV.MPAG.EHN. ML:2.3 0.000195 1.28 AML other m 2023-09-19T22:23:08.92
IV.PIEI.HHN. ML:2.0 0.0001048 0.56 AML other m 2023-09-19T22:23:09.63
IV.MURB.HHE. ML:2.7 0.00041700000000000005 0.96 AML other m 2023-09-19T22:23:12.07
IV.MGAB.HHE. ML:2.5 0.00020899999999999998 0.44 AML other m 2023-09-19T22:23:14.14
IV.MGAB.HHN. ML:2.6 0.0002415 1.28 AML other m 2023-09-19T22:23:14.65
IV.MURB.HHN. ML:2.7 0.00041500000000000006 0.42 AML other m 2023-09-19T22:23:14.55
IV.ASSB.HHE. ML:2.1 0.0000761 0.72 AML other m 2023-09-19T22:23:23.55
IV.CSP1.EHE. ML:2.9 0.000334 0.46 AML other m 2023-09-19T22:23:27.77
IV.CSP1.EHN. ML:2.8 0.00027899999999999995 1.36 AML other m 2023-09-19T22:23:28.78
IV.ASSB.HHN. ML:2.1 0.00007489999999999999 1.5 AML other m 2023-09-19T22:23:29.76
OX.MLN.HHN. ML:2.5 0.00006795000000000001 0.36 AML other m 2023-09-19T22:23:34.29
NI.VINO.HHE. ML:2.4 0.0000414 0.82 AML other m 2023-09-19T22:23:40.97
NI.VINO.HHN. ML:2.4 0.00003695 0.46 AML other m 2023-09-19T22:23:41.57
OX.MLN.HHE. ML:2.2 0.00003465 0.74 AML other m 2023-09-19T22:23:44.13
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