Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 01-10-2023 and time 02:58:56 (Italy) in region 4 km NW Modigliana (FC)

A magnitude ML 1.2 earthquake occured in region: 4 km NW Modigliana (FC), on

  • 01-10-2023 00:58:56 (UTC)
  • 01-10-2023 02:58:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1800, 11.7470 at 20 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
Modigliana FC 5 4560 4560
Brisighella RA 5 7639 12199
Casola Valsenio RA 11 2617 14816
Riolo Terme RA 11 5720 20536
Tredozio FC 11 1212 21748
Dovadola FC 13 1653 23401
Rocca San Casciano FC 15 1910 25311
Marradi FI 16 3139 28450
Faenza RA 16 58541 86991
Castel Bolognese RA 16 9554 96545
Castrocaro Terme e Terra del Sole FC 16 6426 102971
Borgo Tossignano BO 17 3288 106259
Casalfiumanese BO 17 3438 109697
Portico e San Benedetto FC 17 756 110453
Fontanelice BO 17 1943 112396
Palazzuolo sul Senio FI 18 1154 113550
Castel del Rio BO 20 1246 114796
Imola BO 20 69797 184593

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km SW of Faenza (58541 inhabitants)
20 Km S of Imola (69797 inhabitants)
24 Km W of Forlì (117913 inhabitants)
40 Km W of Cesena (96758 inhabitants)
45 Km SW of Ravenna (159116 inhabitants)
48 Km SE of Bologna (386663 inhabitants)
60 Km NE of Firenze (382808 inhabitants)
62 Km NE of Prato (191150 inhabitants)
65 Km NE of Scandicci (50609 inhabitants)
67 Km W of Rimini (147750 inhabitants)
72 Km E of Pistoia (90315 inhabitants)
74 Km S of Ferrara (133155 inhabitants)
80 Km N of Arezzo (99543 inhabitants)
83 Km SE of Modena (184973 inhabitants)
96 Km SE of Carpi (70699 inhabitants)
98 Km W of Pesaro (94582 inhabitants)
99 Km S of Rovigo (51867 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 1.2 2023-10-01
00:58:56		 44.1795 11.7467 21 2023-10-01
01:06:25		 Sala Sismica INGV-Roma 121632791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-01 00:58:56 ± 0.11
Latitude 44.1795 ± 0.0054
Longitude 11.7467 ± 0.0050
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121632791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 468
Semi-minor axis of confidence ellipse (meter) 352
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 169
Circular confidence region, given by single value of horizontal uncertainty (meter) 470.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.01709
Epicentral distance of station farthest from the epicenter (degree) 0.44696
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:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 121632791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-01 01:06:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SEI.HHZ. 2023-10-01T00:59:08.62 0.6 undecidable manual S 246 33.8439 112 0.26 62
IV.VISG.HHZ. 2023-10-01T00:59:06.25 0.3 undecidable manual S 273 24.8529 122 0.04 99
IV.FNVD.HHZ. 2023-10-01T00:59:05.61 0.6 undecidable manual P 269 49.617 104 0.02 63
IV.IMOL.EHZ. 2023-10-01T00:59:05.35 0.6 undecidable manual S 359 19.9689 129 0.21 64
IT.MRR.HGZ. 2023-10-01T00:59:04.74 0.3 undecidable manual S 222 17.1717 134 0.16 97
IT.MCS.HGE. 2023-10-01T00:59:03.66 0.3 undecidable manual P 126 35.3424 111 0.17 93
IV.LMD.HHZ. 2023-10-01T00:59:03.67 0.3 undecidable manual S 196 11.7771 146 0.03 100
IV.SEI.HHZ. 2023-10-01T00:59:03.08 0.3 undecidable manual P 246 33.8439 112 -0.2 93
IV.MTRZ.HHZ. 2023-10-01T00:59:02.95 0.6 negative manual P 300 29.5482 116 0.28 62
IT.MOG.HNZ. 2023-10-01T00:59:02.47 0.6 undecidable manual S 122 1.8981 174 -0.25 66
IV.VMGN.HHZ. 2023-10-01T00:59:02.75 0.6 negative manual P 214 30.2475 116 -0.02 65
IV.IMOL.EHZ. 2023-10-01T00:59:01.32 0.3 undecidable manual P 359 19.9689 129 -0.1 98
IV.VISG.HHZ. 2023-10-01T00:59:01.88 0.6 undecidable manual P 273 24.8529 122 -0.16 64
IT.MRR.HGZ. 2023-10-01T00:59:00.88 0.3 undecidable manual P 222 17.1717 134 -0.22 96
IT.MOG.HNZ. 2023-10-01T00:59:00.07 0.6 undecidable manual P 122 1.8981 174 0.05 68
IV.LMD.HHZ. 2023-10-01T00:59:00.17 1.0 undecidable manual P 196 11.7771 146 -0.39 31
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.2 0.00010593332499999999 0.1 AML other m 2023-10-01T00:59:03.65
IV.LMD.HHN. ML:1.3 0.00013585764000000001 0.12 AML other m 2023-10-01T00:59:03.83
IV.VISG.HHE. ML:1.2 0.00008136721499999999 0.26 AML other m 2023-10-01T00:59:06.44
IV.VISG.HHN. ML:1.3 0.0001003 0.3 AML other m 2023-10-01T00:59:06.82
IV.VMGN.HHE. ML:0.7 0.000019535408 0.26 AML other m 2023-10-01T00:59:08.81
IV.VMGN.HHN. ML:0.9 0.000029049999999999998 0.24 AML other m 2023-10-01T00:59:08.84
IV.MTRZ.HHN. ML:1.4 0.00010664999999999999 0.3 AML other m 2023-10-01T00:59:10.75
IV.SEI.HHN. ML:1.2 0.0000665 1.48 AML other m 2023-10-01T00:59:10.97
IV.SEI.HHE. ML:1.1 0.0000506 0.32 AML other m 2023-10-01T00:59:11.10
IV.MTRZ.HHE. ML:1.4 0.00009914999999999998 0.42 AML other m 2023-10-01T00:59:11.59
IV.FNVD.HHE. ML:1.3 0.0000438 0.34 AML other m 2023-10-01T00:59:13.86
IV.FNVD.HHN. ML:0.8 0.000013899999999999999 0.26 AML other m 2023-10-01T00:59:14.33
IV.IMOL.HNE. ML:1.4 0.000155323895 0.32 AML other m 2023-10-01T00:59:07.35
IV.IMOL.HNN. ML:1.3 0.00010508761 0.2304 AML other m 2023-10-01T00:59:06.94
IV.IMOL.EHE. ML:1.2 0.000086490665 0.38 AML other m 2023-10-01T00:59:07.54
IV.IMOL.EHN. ML:0.9 0.000047101589999999996 0.2 AML other m 2023-10-01T00:59:06.75
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