Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 26-11-2023 and time 10:58:54 (UTC) in region 5 km SW Tredozio (FC)

A magnitude ML 1.5 earthquake occured in region: 5 km SW Tredozio (FC), on

  • 26-11-2023 10:58:54 (UTC)
  • 26-11-2023 11:58:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0560, 11.6930 at 9 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
Tredozio FC 5 1212 1212
Marradi FI 7 3139 4351
Portico e San Benedetto FC 8 756 5107
Premilcuore FC 11 799 5906
Rocca San Casciano FC 12 1910 7816
Palazzuolo sul Senio FI 13 1154 8970
Modigliana FC 14 4560 13530
San Godenzo FI 15 1167 14697
Dovadola FC 17 1653 16350
Galeata FC 19 2516 18866
Casola Valsenio RA 20 2617 21483
Brisighella RA 20 7639 29122

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Faenza (58541 inhabitants)
33 Km S of Imola (69797 inhabitants)
34 Km SW of Forlì (117913 inhabitants)
45 Km W of Cesena (96758 inhabitants)
47 Km NE of Firenze (382808 inhabitants)
51 Km E of Prato (191150 inhabitants)
53 Km NE of Scandicci (50609 inhabitants)
56 Km SE of Bologna (386663 inhabitants)
57 Km SW of Ravenna (159116 inhabitants)
63 Km E of Pistoia (90315 inhabitants)
67 Km N of Arezzo (99543 inhabitants)
70 Km W of Rimini (147750 inhabitants)
87 Km NE of Siena (53903 inhabitants)
87 Km S of Ferrara (133155 inhabitants)
90 Km SE of Modena (184973 inhabitants)
98 Km E of Lucca (89046 inhabitants)
99 Km W of Pesaro (94582 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 1.5 2023-11-26
10:58:54		 44.056 11.6927 9 2023-11-26
11:09:14		 Sala Sismica INGV-Roma 123465521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-11-26 10:58:54 ± 0.05
Latitude 44.0560 ± 0.0027
Longitude 11.6927 ± 0.0038
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 123465521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 286
Semi-minor axis of confidence ellipse (meter) 218
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 168
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.47484
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 123465521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-11-26 11:09:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTQR.HHZ. 2023-11-26T10:59:34.28 3.0 negative manual Pn 0.5 0
IV.STAL.HHZ. 2023-11-26T10:59:34.19 3.0 positive manual Pg 0.62 0
IV.BAG8.EHZ. 2023-11-26T10:59:32.04 3.0 negative manual Pg 3.33 0
OX.MARN.HHZ. 2023-11-26T10:59:25.99 3.0 undecidable manual P 2.05 0
IV.CRE.HHZ. 2023-11-26T10:59:12.26 0.6 undecidable manual S 157 52.7028 50 0.25 44
IV.IMOL.EHZ. 2023-11-26T10:59:07.24 0.6 undecidable manual S 7 33.9438 50 0.25 46
IV.BOSL.HHZ. 2023-11-26T10:59:05.55 0.6 undecidable manual S 241 28.9488 107 0.11 48
IV.RUFI.EHZ. 2023-11-26T10:59:05.03 0.6 undecidable manual S 211 28.2495 107 -0.19 47
IV.SEI.HHZ. 2023-11-26T10:59:04.68 0.6 undecidable manual S 270 26.6511 108 0 49
IV.CRE.HHZ. 2023-11-26T10:59:04.63 0.1 negative manual P 157 52.7028 50 -0.17 90
IV.VISG.HHZ. 2023-11-26T10:59:04.28 0.6 undecidable manual S 306 25.3524 109 0.04 49
IV.SFI.EHZ. 2023-11-26T10:59:02.79 0.6 undecidable manual S 144 20.7681 113 0.01 49
IV.VMGN.HHZ. 2023-11-26T10:59:01.84 0.6 undecidable manual S 229 17.0718 117 0.25 47
IV.BOSL.HHZ. 2023-11-26T10:59:01.02 0.1 undecidable manual P 241 28.9488 107 0.01 97
IV.IMOL.EHZ. 2023-11-26T10:59:01.38 0.6 undecidable manual P 7 33.9438 50 -0.52 43
IV.VISG.HHZ. 2023-11-26T10:59:00.35 1.0 undecidable manual P 306 25.3524 109 0.03 24
IV.SEI.HHZ. 2023-11-26T10:59:00.50 0.1 undecidable manual P 270 26.6511 108 -0.07 97
IT.MOG.HNZ. 2023-11-26T10:59:00.64 0.6 undecidable manual S 25 13.9749 122 -0.03 50
IV.RUFI.EHZ. 2023-11-26T10:59:00.74 0.6 undecidable manual P 211 28.2495 107 -0.14 48
IV.VMGN.HHZ. 2023-11-26T10:58:59.03 0.1 positive manual P 229 17.0718 117 0.25 95
IV.SFI.EHZ. 2023-11-26T10:58:59.42 0.1 positive manual P 144 20.7681 113 -0.05 98
IT.MOG.HNZ. 2023-11-26T10:58:58.47 0.1 undecidable manual P 25 13.9749 122 0.21 96
IT.MRR.HGZ. 2023-11-26T10:58:58.61 0.6 undecidable manual S 277 7.1928 140 -0.26 48
IT.MRR.HGZ. 2023-11-26T10:58:57.15 0.1 undecidable manual P 277 7.1928 140 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VMGN.HHE. ML:1.6 0.0003725 0.36 AML other m 2023-11-26T10:59:02.45
IV.SFI.HNE. ML:1.7 0.0003325 0.2 AML other m 2023-11-26T10:59:03.67
IV.SFI.EHE. ML:1.6 0.0003005 0.18 AML other m 2023-11-26T10:59:03.68
IV.SFI.HNN. ML:1.7 0.00038250000000000003 0.8 AML other m 2023-11-26T10:59:03.84
IV.SFI.EHN. ML:1.7 0.00034599999999999995 0.52 AML other m 2023-11-26T10:59:03.59
IV.VMGN.HHN. ML:1.6 0.00032250000000000003 1.54 AML other m 2023-11-26T10:59:04.88
IV.VISG.HHN. ML:1.4 0.00014150000000000002 0.28 AML other m 2023-11-26T10:59:05.55
IV.RUFI.EHN. ML:1.7 0.00026700000000000004 0.32 AML other m 2023-11-26T10:59:05.58
IV.VISG.HHE. ML:1.2 0.00009460000000000001 1.48 AML other m 2023-11-26T10:59:05.07
IV.RUFI.EHE. ML:1.2 0.00008879999999999999 0.94 AML other m 2023-11-26T10:59:06.23
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