Earthquake with magnitude of ML 0.8 on date 20-09-2023 and time 11:58:04 (UTC) in region 5 km W Tredozio (FC)

A magnitude ML 0.8 earthquake occured in region: 5 km W Tredozio (FC), on

  • 20-09-2023 11:58:04 (UTC)
  • 20-09-2023 13:58:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0720, 11.6860 at 6 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
Tredozio FC 5 1212 1212
Marradi FI 6 3139 4351
Portico e San Benedetto FC 9 756 5107
Palazzuolo sul Senio FI 12 1154 6261
Rocca San Casciano FC 13 1910 8171
Modigliana FC 13 4560 12731
Premilcuore FC 13 799 13530
San Godenzo FI 17 1167 14697
Dovadola FC 17 1653 16350
Casola Valsenio RA 18 2617 18967
Brisighella RA 18 7639 26606
Galeata FC 20 2516 29122

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SW of Faenza (58541 inhabitants)
31 Km S of Imola (69797 inhabitants)
33 Km SW of Forlì (117913 inhabitants)
45 Km W of Cesena (96758 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
52 Km E of Prato (191150 inhabitants)
53 Km NE of Scandicci (50609 inhabitants)
54 Km SE of Bologna (386663 inhabitants)
56 Km SW of Ravenna (159116 inhabitants)
63 Km E of Pistoia (90315 inhabitants)
69 Km N of Arezzo (99543 inhabitants)
70 Km W of Rimini (147750 inhabitants)
85 Km S of Ferrara (133155 inhabitants)
88 Km SE of Modena (184973 inhabitants)
88 Km NE of Siena (53903 inhabitants)
98 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 0.8 2023-09-20
11:58:04
44.0725 11.6855 6 2023-09-20
12:19:19
Sala Sismica INGV-Roma 121275701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-20 11:58:04 ± 0.12
Latitude 44.0725 ± 0.0036
Longitude 11.6855 ± 0.0050
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121275701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 408
Semi-minor axis of confidence ellipse (meter) 215
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 194
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.01619
Epicentral distance of station farthest from the epicenter (degree) 0.26620
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 121275701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-20 12:19:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BOSL.HHE. 2023-09-20T11:58:14.46 0.3 undecidable manual S 238 29.3484 101 -0.11 72
IV.SEI.HHZ. 2023-09-20T11:58:13.28 0.6 undecidable manual S 266 26.1516 103 -0.2 48
IV.VISG.HHZ. 2023-09-20T11:58:12.89 0.3 undecidable manual S 303 23.8539 104 0.2 72
IV.SFI.HNZ. 2023-09-20T11:58:12.56 0.6 undecidable manual S 145 22.6551 105 0.26 47
IV.VMGN.HHZ. 2023-09-20T11:58:11.04 0.6 undecidable manual S 223 17.871 108 0.32 47
IV.RUFI.EHZ. 2023-09-20T11:58:09.93 0.3 positive manual P 208 29.5482 101 -0.29 70
IV.VISG.HHZ. 2023-09-20T11:58:09.04 0.3 positive manual P 303 23.8539 104 -0.05 74
IV.SEI.HHZ. 2023-09-20T11:58:09.34 0.3 negative manual P 266 26.1516 103 -0.21 71
IV.BOSL.HHE. 2023-09-20T11:58:09.99 0.6 undecidable manual P 238 29.3484 101 -0.19 47
IV.RINC.EHZ. 2023-09-20T11:58:08.70 0.6 positive manual P 197 21.5673 105 0.04 50
IV.VMGN.HHZ. 2023-09-20T11:58:08.15 0.3 positive manual P 223 17.871 108 0.2 72
IV.SFI.HNZ. 2023-09-20T11:58:08.79 1.0 undecidable manual P 145 22.6551 105 -0.08 25
IT.MOG.HNZ. 2023-09-20T11:58:07.23 0.6 undecidable manual P 31 12.6762 115 0.25 48
IT.MRR.HGZ. 2023-09-20T11:58:07.39 0.3 undecidable manual S 262 6.5934 132 0.13 75
IV.LMD.HHZ. 2023-09-20T11:58:06.11 0.6 undecidable manual S 72 1.7982 163 -0.23 49
IT.MRR.HGZ. 2023-09-20T11:58:06.08 0.1 undecidable manual P 262 6.5934 132 0.12 100
IV.LMD.HHZ. 2023-09-20T11:58:05.22 0.3 undecidable manual P 72 1.7982 163 -0.2 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:0.0 0.00061943185 0.0768 AML other m 2023-09-20T11:58:06.24
IV.LMD.HHN. ML:0.0 0.001846908 0.2816 AML other m 2023-09-20T11:58:06.20
IV.VMGN.HHE. ML:0.6 0.000034957825 2.9248 AML other m 2023-09-20T11:58:12.30
IV.VMGN.HHN. ML:0.6 0.000040481340000000004 0.4416 AML other m 2023-09-20T11:58:12.11
IV.VISG.HHE. ML:0.6 0.000026621745 0.064 AML other m 2023-09-20T11:58:13.54
IV.VISG.HHN. ML:0.8 0.00003812415 0.096 AML other m 2023-09-20T11:58:13.70
IV.SEI.HHE. ML:1.3 0.0001232809 0.2624 AML other m 2023-09-20T11:58:13.76
IV.SEI.HHN. ML:1.6 0.0002210001 0.64 AML other m 2023-09-20T11:58:14.02
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download