Earthquake with magnitude of ML 2.1 on date 20-09-2023 and time 07:48:51 (UTC) in region 4 km E Marradi (FI)

A magnitude ML 2.1 earthquake occured in region: 4 km E Marradi (FI), on

  • 20-09-2023 07:48:51 (UTC)
  • 20-09-2023 09:48:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0790, 11.6590 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.

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 4 3139 3139
Tredozio FC 7 1212 4351
Palazzuolo sul Senio FI 10 1154 5505
Portico e San Benedetto FC 11 756 6261
Modigliana FC 14 4560 10821
Premilcuore FC 15 799 11620
Rocca San Casciano FC 15 1910 13530
Casola Valsenio RA 16 2617 16147
San Godenzo FI 17 1167 17314
Brisighella RA 18 7639 24953
Dovadola FC 19 1653 26606
Castel del Rio BO 19 1246 27852

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SW of Faenza (58541 inhabitants)
31 Km S of Imola (69797 inhabitants)
35 Km W of Forlì (117913 inhabitants)
47 Km NE of Firenze (382808 inhabitants)
47 Km W of Cesena (96758 inhabitants)
50 Km E of Prato (191150 inhabitants)
52 Km NE of Scandicci (50609 inhabitants)
53 Km SE of Bologna (386663 inhabitants)
57 Km SW of Ravenna (159116 inhabitants)
61 Km E of Pistoia (90315 inhabitants)
70 Km N of Arezzo (99543 inhabitants)
73 Km W of Rimini (147750 inhabitants)
84 Km S of Ferrara (133155 inhabitants)
86 Km SE of Modena (184973 inhabitants)
89 Km NE of Siena (53903 inhabitants)
96 Km E of Lucca (89046 inhabitants)
100 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 2.1 2023-09-20
07:48:51
44.079 11.6587 8 2023-09-20
08:04:46
Sala Sismica INGV-Roma 121265211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-20 07:48:51 ± 0.07
Latitude 44.0790 ± 0.0036
Longitude 11.6587 ± 0.0050
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 121265211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 416
Semi-minor axis of confidence ellipse (meter) 302
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 219
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 31
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) 0.59985
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 17
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 121265211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-20 08:04:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.SENA.HHZ. 2023-09-20T07:50:40.79 3.0 undecidable manual Sn 0.37 0
IV.AGLI.HHZ. 2023-09-20T07:50:32.02 3.0 undecidable manual Sn 4.03 0
IV.CAR1.HHZ. 2023-09-20T07:50:21.25 3.0 negative manual Pn 1.9 0
IV.INTR.HHZ. 2023-09-20T07:50:08.88 3.0 undecidable manual Sn 1.14 0
IV.SNAL.HNZ. 2023-09-20T07:50:04.33 3.0 undecidable manual Pg 9.75 0
IV.CERT.HHZ. 2023-09-20T07:50:03.60 3.0 undecidable manual Sg 3.29 0
IV.VENT.EHZ. 2023-09-20T07:49:53.69 3.0 undecidable manual Pg 6.96 0
GU.RSP.HHZ. 2023-09-20T07:49:52.72 3.0 undecidable manual Pg 8.93 0
IT.GLNS.HNZ. 2023-09-20T07:49:46.79 3.0 undecidable manual Pn 4.22 0
IV.MMO1.EHZ. 2023-09-20T07:49:45.39 3.0 undecidable manual Sn 0.85 0
IV.CAMP.HHZ. 2023-09-20T07:49:31.35 3.0 undecidable manual Pg 5.58 0
IV.ATFO.HHZ. 2023-09-20T07:49:24.60 3.0 undecidable manual S -1.7 0
IV.FOSV.EHZ. 2023-09-20T07:49:14.58 3.0 negative manual P 0.92 0
IV.CRE.HHZ. 2023-09-20T07:49:10.14 0.1 undecidable manual S 155 56.1993 50 0 94
IV.CAFI.HHZ. 2023-09-20T07:49:07.96 3.0 negative manual P 0.25 0
IV.MTRZ.HHZ. 2023-09-20T07:49:05.87 0.6 undecidable manual S 324 31.9458 104 2.51 11
IV.MOCL.EHZ. 2023-09-20T07:49:05.35 0.6 undecidable manual S 258 39.0276 50 -0.21 46
IT.MCS.HGZ. 2023-09-20T07:49:05.77 0.6 undecidable manual S 105 36.9297 50 0.75 39
IV.PARC.HHZ. 2023-09-20T07:49:03.94 0.1 undecidable manual P 136 66.5778 50 -0.12 90
IV.RUFI.EHZ. 2023-09-20T07:49:02.65 0.6 undecidable manual S 204 29.2485 105 0.18 47
IV.CRE.HHZ. 2023-09-20T07:49:02.11 1.0 positive manual P 155 56.1993 50 -0.35 22
IV.BOSL.HHZ. 2023-09-20T07:49:02.23 0.6 undecidable manual S 234 28.0497 106 0.18 47
IV.SFI.EHZ. 2023-09-20T07:49:01.04 0.6 undecidable manual S 142 24.4533 108 0.17 48
IV.RINC.EHZ. 2023-09-20T07:49:00.29 0.6 undecidable manual S 191 21.7671 110 0.31 47
IV.FNVD.HHZ. 2023-09-20T07:49:00.22 0.3 undecidable manual P 283 43.8228 50 -0.33 67
IV.SEI.HHZ. 2023-09-20T07:49:00.93 0.6 undecidable manual S 264 24.0537 108 0.19 48
IV.MPPT.EHZ. 2023-09-20T07:49:00.86 0.6 undecidable manual P 254 47.3193 50 -0.23 45
IT.MCS.HGZ. 2023-09-20T07:48:59.44 0.1 undecidable manual P 105 36.9297 50 -0.06 96
IV.VISG.HHZ. 2023-09-20T07:48:59.92 0.6 undecidable manual S 304 21.6672 110 -0.02 50
IV.MOCL.EHZ. 2023-09-20T07:48:59.46 0.1 positive manual P 258 39.0276 50 -0.35 90
IV.VMGN.HHZ. 2023-09-20T07:48:58.79 0.6 undecidable manual S 216 17.0718 114 0.32 47
IV.MTRZ.HHZ. 2023-09-20T07:48:58.93 0.1 undecidable manual P 324 31.9458 104 0.39 90
IT.MOG.HNE. 2023-09-20T07:48:57.56 0.6 undecidable manual S 40 13.2756 120 0.25 48
IV.BOSL.HHZ. 2023-09-20T07:48:57.86 0.3 positive manual P 234 28.0497 106 0.08 73
IV.RUFI.EHZ. 2023-09-20T07:48:57.90 0.1 positive manual P 204 29.2485 105 -0.13 96
IV.SFI.EHZ. 2023-09-20T07:48:57.08 1.0 negative manual P 142 24.4533 108 -0.03 25
IV.VISG.HHZ. 2023-09-20T07:48:56.51 0.1 positive manual P 304 21.6672 110 -0.06 98
IV.RINC.EHZ. 2023-09-20T07:48:56.75 0.1 positive manual P 191 21.7671 110 0.16 96
IV.SEI.HHZ. 2023-09-20T07:48:56.92 0.1 positive manual P 264 24.0537 108 -0.11 97
IT.MOG.HNE. 2023-09-20T07:48:55.15 0.1 undecidable manual P 40 13.2756 120 0.1 99
IV.VMGN.HHZ. 2023-09-20T07:48:55.99 0.1 positive manual P 216 17.0718 114 0.27 95
IV.LMD.HHZ. 2023-09-20T07:48:54.32 0.6 undecidable manual S 92 3.8961 154 -0.65 43
IT.MRR.HGZ. 2023-09-20T07:48:54.72 0.6 undecidable manual S 250 4.6953 149 -0.4 47
IT.MRR.HGZ. 2023-09-20T07:48:53.66 0.1 undecidable manual P 250 4.6953 149 -0.12 100
IV.LMD.HHZ. 2023-09-20T07:48:53.34 0.1 undecidable manual P 92 3.8961 154 -0.36 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VMGN.HHE. ML:1.9 0.000796 0.36 AML other m 2023-09-20T07:48:59.53
IV.SFI.EHE. ML:2.2 0.0010175000000000002 0.74 AML other m 2023-09-20T07:49:01.28
IV.SFI.HNE. ML:2.2 0.0009755 0.74 AML other m 2023-09-20T07:49:01.28
IV.SEI.HHN. ML:2.9 0.005325 0.28 AML other m 2023-09-20T07:49:01.40
IV.VMGN.HHN. ML:2.1 0.0011140000000000002 0.4 AML other m 2023-09-20T07:49:01.47
IV.RINC.EHE. ML:2.3 0.00149 1.46 AML other m 2023-09-20T07:49:01.19
IV.RINC.EHN. ML:2.2 0.001109 1.1 AML other m 2023-09-20T07:49:02.56
IV.VISG.HHE. ML:1.8 0.000489 0.78 AML other m 2023-09-20T07:49:02.82
IV.RUFI.EHN. ML:2.2 0.000764 0.24 AML other m 2023-09-20T07:49:02.80
IV.BOSL.HHN. ML:1.9 0.0004025 0.38 AML other m 2023-09-20T07:49:02.94
IV.BOSL.HHE. ML:1.6 0.00022250000000000001 1.32 AML other m 2023-09-20T07:49:02.96
IV.VISG.HHN. ML:1.9 0.000597 1.56 AML other m 2023-09-20T07:49:03.93
IV.RUFI.EHE. ML:1.7 0.00022999999999999998 0.22 AML other m 2023-09-20T07:49:03.23
IV.SEI.HHE. ML:2.6 0.00266 0.34 AML other m 2023-09-20T07:49:03.63
IV.SFI.HNN. ML:2.1 0.0008095 1.36 AML other m 2023-09-20T07:49:04.77
IV.SFI.EHN. ML:2.1 0.0008575000000000001 0.94 AML other m 2023-09-20T07:49:04.77
IV.MOCL.EHE. ML:2.2 0.0005629999999999999 1.78 AML other m 2023-09-20T07:49:06.04
IV.MOCL.EHN. ML:2.4 0.00103 0.18 AML other m 2023-09-20T07:49:06.17
IV.MTRZ.HHN. ML:2.3 0.0008845 0.66 AML other m 2023-09-20T07:49:08.66
IV.MTRZ.HNN. ML:2.2 0.0008235 0.56 AML other m 2023-09-20T07:49:08.66
IV.FNVD.HHE. ML:2.2 0.0005520000000000001 0.5 AML other m 2023-09-20T07:49:09.20
IV.MTRZ.HHE. ML:2.3 0.00099 0.66 AML other m 2023-09-20T07:49:10.14
IV.MTRZ.HNE. ML:2.3 0.0008895 0.64 AML other m 2023-09-20T07:49:10.15
IV.MPPT.EHN. ML:1.8 0.000185 0.48 AML other m 2023-09-20T07:49:10.61
IV.CRE.HHN. ML:2.7 0.0012900000000000001 0.24 AML other m 2023-09-20T07:49:11.00
IV.MPPT.EHE. ML:1.9 0.0002465 1.26 AML other m 2023-09-20T07:49:11.79
IV.CRE.HHE. ML:2.4 0.0005529999999999999 0.24 AML other m 2023-09-20T07:49:11.24
IV.FNVD.HHN. ML:1.7 0.0001635 0.4 AML other m 2023-09-20T07:49:11.57
IV.PARC.HHN. ML:1.9 0.0001475 0.42 AML other m 2023-09-20T07:49:20.47
IV.PARC.HHE. ML:1.8 0.00009970000000000001 0.4 AML other m 2023-09-20T07:49:20.90
IV.CAFI.HHE. ML:2.1 0.0001435 1.36 AML other m 2023-09-20T07:49:21.90
IV.CAFI.HHN. ML:1.9 0.00009975 0.92 AML other m 2023-09-20T07:49:24.70
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