Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 30-10-2023 and time 05:11:39 (UTC) in region 4 km W Premilcuore (FC)

A magnitude ML 1.4 earthquake occured in region: 4 km W Premilcuore (FC), on

  • 30-10-2023 05:11:39 (UTC)
  • 30-10-2023 06:11:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9890, 11.7350 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
Premilcuore FC 4 799 799
Portico e San Benedetto FC 6 756 1555
Tredozio FC 10 1212 2767
San Godenzo FI 11 1167 3934
Rocca San Casciano FC 12 1910 5844
Marradi FI 14 3139 8983
Galeata FC 14 2516 11499
Santa Sofia FC 15 4136 15635
Civitella di Romagna FC 17 3786 19421
Dovadola FC 19 1653 21074
Modigliana FC 19 4560 25634
Londa FI 20 1840 27474
Dicomano FI 20 5515 32989

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Faenza (58541 inhabitants)
36 Km SW of Forlì (117913 inhabitants)
41 Km S of Imola (69797 inhabitants)
44 Km W of Cesena (96758 inhabitants)
45 Km NE of Firenze (382808 inhabitants)
51 Km NE of Scandicci (50609 inhabitants)
52 Km E of Prato (191150 inhabitants)
59 Km N of Arezzo (99543 inhabitants)
60 Km SW of Ravenna (159116 inhabitants)
64 Km SE of Bologna (386663 inhabitants)
66 Km E of Pistoia (90315 inhabitants)
67 Km W of Rimini (147750 inhabitants)
81 Km NE of Siena (53903 inhabitants)
95 Km S of Ferrara (133155 inhabitants)
95 Km W of Pesaro (94582 inhabitants)
97 Km SE of Modena (184973 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 1.4 2023-10-30
05:11:39		 43.9887 11.7352 8 2023-10-30
05:20:34		 Sala Sismica INGV-Roma 122568181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-30 05:11:39 ± 0.06
Latitude 43.9887 ± 0.0027
Longitude 11.7352 ± 0.0037
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 122568181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 320
Semi-minor axis of confidence ellipse (meter) 161
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 225
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.57736
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 122568181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-30 05:20:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCIV.CHZ. 2023-10-30T05:12:17.13 3.0 undecidable manual S -0.08 0
IV.CRMI.HHZ. 2023-10-30T05:12:00.24 0.1 undecidable manual S 251 64.0914 50 0.33 87
IV.FOSV.EHZ. 2023-10-30T05:11:57.00 3.0 negative manual P -0.21 0
IV.PARC.HHZ. 2023-10-30T05:11:57.52 0.6 undecidable manual S 133 55.2003 50 -0.02 47
IV.CRE.HHZ. 2023-10-30T05:11:54.96 0.1 undecidable manual S 157 44.5221 50 0.27 91
IV.MOCL.EHZ. 2023-10-30T05:11:54.50 0.1 undecidable manual S 273 44.3223 50 -0.13 94
IV.VISG.HHN. 2023-10-30T05:11:51.22 0.3 undecidable manual S 313 32.745 104 -0.14 71
IV.CRMI.HHZ. 2023-10-30T05:11:51.37 0.6 negative manual P 251 64.0914 50 0.01 46
IV.BOSL.HHE. 2023-10-30T05:11:50.41 0.1 undecidable manual S 258 29.5482 105 0.12 96
IV.SEI.HHZ. 2023-10-30T05:11:50.80 0.1 undecidable manual S 284 30.9468 105 0.04 98
IV.PARC.HHZ. 2023-10-30T05:11:50.25 0.3 undecidable manual P 133 55.2003 50 0.26 67
IV.MOCL.EHZ. 2023-10-30T05:11:48.09 0.6 negative manual P 273 44.3223 50 -0.22 46
IV.RUFI.EHE. 2023-10-30T05:11:48.61 0.1 undecidable manual S 227 24.5532 108 -0.04 99
IV.CRE.HHZ. 2023-10-30T05:11:47.82 0.3 positive manual P 157 44.5221 50 -0.52 64
IT.MOG.HNE. 2023-10-30T05:11:47.67 0.1 undecidable manual S 7 20.3685 112 0.41 92
IV.VISG.HHN. 2023-10-30T05:11:46.03 0.1 undecidable manual P 313 32.745 104 -0.39 90
IV.VMGN.HHZ. 2023-10-30T05:11:46.24 0.1 undecidable manual S 257 16.5723 116 0.16 97
IV.SEI.HHZ. 2023-10-30T05:11:45.67 0.1 positive manual P 284 30.9468 105 -0.41 90
IV.RINC.EHZ. 2023-10-30T05:11:45.82 0.1 undecidable manual S 222 15.2736 118 0.16 98
IT.MRR.HGN. 2023-10-30T05:11:45.22 0.3 undecidable manual S 309 13.4754 121 0.11 74
IV.BOSL.HHE. 2023-10-30T05:11:45.65 0.1 undecidable manual P 258 29.5482 105 -0.16 95
IV.SFI.EHZ. 2023-10-30T05:11:44.84 0.1 undecidable manual S 136 12.876 122 -0.11 99
IV.RUFI.EHE. 2023-10-30T05:11:44.73 0.1 undecidable manual P 227 24.5532 108 -0.13 97
IT.MOG.HNE. 2023-10-30T05:11:44.06 0.1 undecidable manual P 7 20.3685 112 0.01 100
IV.RINC.EHZ. 2023-10-30T05:11:43.21 0.3 positive manual P 222 15.2736 118 0.08 75
IV.VMGN.HHZ. 2023-10-30T05:11:43.48 0.1 positive manual P 257 16.5723 116 0.11 99
IV.SFI.EHZ. 2023-10-30T05:11:42.65 0.1 undecidable manual P 136 12.876 122 -0.07 100
IT.MRR.HGN. 2023-10-30T05:11:42.90 0.3 undecidable manual P 309 13.4754 121 0.09 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RINC.EHE. ML:1.3 0.00021566459999999997 0.2592 AML other m 2023-10-30T05:11:45.99
IV.RINC.EHN. ML:1.3 0.000208648 0.1792 AML other m 2023-10-30T05:11:46.19
IV.VMGN.HHE. ML:1.2 0.00015161575 0.1184 AML other m 2023-10-30T05:11:47.39
IV.VMGN.HHN. ML:1.1 0.000125 0.16 AML other m 2023-10-30T05:11:46.55
IV.SEI.HHE. ML:1.7 0.00023199999999999997 0.16 AML other m 2023-10-30T05:11:51.19
IV.SEI.HHN. ML:1.9 0.0003855 0.22 AML other m 2023-10-30T05:11:51.29
IV.MOCL.EHE. ML:1.2 0.000045342975 0.1408 AML other m 2023-10-30T05:11:55.73
IV.CRE.HHE. ML:1.4 0.00008595 0.18 AML other m 2023-10-30T05:11:54.94
IV.CRE.HHN. ML:1.6 0.0001315 1.3 AML other m 2023-10-30T05:11:55.28
IV.PARC.HHE. ML:1.0 0.000027228494999999998 0.2016 AML other m 2023-10-30T05:11:58.34
IV.CRMI.HNE. ML:1.8 0.00012162105000000001 1.12 AML other m 2023-10-30T05:12:04.08
IV.FOSV.EHN. ML:1.1 0.000012299139 0.3776 AML other m 2023-10-30T05:12:31.53
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