Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 31-12-2023 and time 10:14:28 (Italy) in region 4 km E Premilcuore (FC)

A magnitude ML 1.7 earthquake occured in region: 4 km E Premilcuore (FC), on

  • 31-12-2023 09:14:28 (UTC)
  • 31-12-2023 10:14:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9910, 11.8220 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
Premilcuore FC 4 799 799
Portico e San Benedetto FC 5 756 1555
Galeata FC 7 2516 4071
Rocca San Casciano FC 8 1910 5981
Santa Sofia FC 9 4136 10117
Civitella di Romagna FC 10 3786 13903
Tredozio FC 12 1212 15115
Dovadola FC 16 1653 16768
San Godenzo FI 18 1167 17935
Predappio FC 18 6346 24281
Modigliana FC 19 4560 28841
Marradi FI 19 3139 31980
Bagno di Romagna FC 19 6026 38006

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km SW of Forlì (117913 inhabitants)
33 Km S of Faenza (58541 inhabitants)
37 Km W of Cesena (96758 inhabitants)
41 Km S of Imola (69797 inhabitants)
52 Km E of Firenze (382808 inhabitants)
56 Km SW of Ravenna (159116 inhabitants)
57 Km E of Scandicci (50609 inhabitants)
59 Km N of Arezzo (99543 inhabitants)
59 Km E of Prato (191150 inhabitants)
60 Km W of Rimini (147750 inhabitants)
68 Km SE of Bologna (386663 inhabitants)
73 Km E of Pistoia (90315 inhabitants)
85 Km NE of Siena (53903 inhabitants)
88 Km W of Pesaro (94582 inhabitants)
95 Km S of Ferrara (133155 inhabitants)
97 Km W of Fano (60888 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 1.7 2023-12-31
09:14:28		 43.9913 11.8217 9 2023-12-31
09:23:54		 Sala Sismica INGV-Roma 124372101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-31 09:14:28 ± 0.04
Latitude 43.9913 ± 0.0018
Longitude 11.8217 ± 0.0025
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 124372101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 250
Semi-minor axis of confidence ellipse (meter) 98
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 237
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 210
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.04
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38401
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 124372101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-31 09:23:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SARZ.HHZ. 2023-12-31T09:15:42.38 3.0 undecidable manual Sg 3.83 0
IV.SRES.HHZ. 2023-12-31T09:15:26.63 3.0 undecidable manual Sg 0.59 0
GU.RORO.HHZ. 2023-12-31T09:15:10.90 3.0 undecidable manual Pn -3.2 0
IV.PP3.EHZ. 2023-12-31T09:14:59.12 3.0 negative manual P 2.67 0
IV.ATMI.HHZ. 2023-12-31T09:14:54.40 3.0 undecidable manual S -1.3 0
IV.PARC.HHZ. 2023-12-31T09:14:45.67 3.0 undecidable manual S -0.23 0
IV.ARVD.HHZ. 2023-12-31T09:14:45.23 3.0 positive manual P -3.52 0
IV.CRMI.HHZ. 2023-12-31T09:14:41.29 3.0 positive manual P -1.62 0
IV.MOCL.EHZ. 2023-12-31T09:14:38.03 3.0 negative manual P -1.53 0
IV.IMOL.EHZ. 2023-12-31T09:14:37.88 3.0 positive manual P -1.17 0
IV.CRE.HHZ. 2023-12-31T09:14:36.40 1.0 negative manual P 166 42.624 50 -0.04 24
IV.VMGN.HHZ. 2023-12-31T09:14:36.93 0.6 undecidable manual S 260 23.4543 112 -0.05 50
IV.BOSL.HHZ. 2023-12-31T09:14:35.53 0.6 positive manual P 260 36.3414 50 0.05 49
IV.VISG.HHZ. 2023-12-31T09:14:35.70 0.3 undecidable manual P 306 37.8288 50 -0.01 74
IV.SEI.HHZ. 2023-12-31T09:14:35.61 0.6 positive manual P 281 37.629 50 -0.06 49
IV.VMGN.HHZ. 2023-12-31T09:14:33.34 0.1 positive manual P 260 23.4543 112 0.06 100
IV.LMD.HHZ. 2023-12-31T09:14:33.83 0.6 undecidable manual S 316 13.1757 125 -0.01 51
IV.CPGN.EHZ. 2023-12-31T09:14:32.06 3.0 undecidable manual P 0
IV.SFI.EHZ. 2023-12-31T09:14:32.88 0.6 undecidable manual S 168 9.7791 133 -0.05 51
IV.SFI.EHZ. 2023-12-31T09:14:31.04 1.0 undecidable manual P 168 9.7791 133 0.1 25
IV.LMD.HHZ. 2023-12-31T09:14:31.47 0.3 positive manual P 316 13.1757 125 0 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.8 0.0007573937 0.1984 AML other m 2023-12-31T09:14:34.01
IV.LMD.HHN. ML:1.8 0.0007097234 0.1984 AML other m 2023-12-31T09:14:34.02
IV.VMGN.HHE. ML:1.3 0.000141 0.46 AML other m 2023-12-31T09:14:37.34
IV.VMGN.HHN. ML:1.3 0.000128153465 0.3008 AML other m 2023-12-31T09:14:37.25
IV.SEI.HHE. ML:1.8 0.0002143715 0.1984 AML other m 2023-12-31T09:14:42.43
IV.CRE.HHN. ML:0.0 0.0001977978 0.32 AML other m 2023-12-31T09:14:42.97
IV.SEI.HHN. ML:2.0 0.000393 1.62 AML other m 2023-12-31T09:14:43.98
IV.CRE.HHE. ML:0.0 0.000093019165 0.256 AML other m 2023-12-31T09:14:44.40
IV.MOCL.EHN. ML:1.4 0.00006582702 0.1408 AML other m 2023-12-31T09:14:45.72
IV.MOCL.EHE. ML:1.3 0.00005465 0.2 AML other m 2023-12-31T09:14:46.44
IV.CRMI.HHN. ML:1.3 0.000036400000000000004 0.68 AML other m 2023-12-31T09:14:51.09
IV.CRMI.HHE. ML:1.2 0.000025550000000000004 0.5 AML other m 2023-12-31T09:14:54.99
IV.SFI.EHE. ML:2.1 0.0016956105000000001 0.2368 AML other m 2023-12-31T09:14:32.97
IV.SFI.EHN. ML:2.0 0.00132685735 0.16 AML other m 2023-12-31T09:14:33.01
IV.SFI.HNE. ML:2.0 0.0014727785 0.1408 AML other m 2023-12-31T09:14:32.97
IV.SFI.HNN. ML:2.0 0.0012841429 0.1536 AML other m 2023-12-31T09:14:33.01
IV.IMOL.EHE. ML:1.4 0.00008970772 0.2816 AML other m 2023-12-31T09:14:46.67
IV.IMOL.EHN. ML:1.3 0.00007119089234999999 0.4032 AML other m 2023-12-31T09:14:47.24
IV.IMOL.HNE. ML:1.8 0.00023087655 0.0704 AML other m 2023-12-31T09:14:59.36
IV.IMOL.HNN. ML:1.8 0.000205531545 0.2048 AML other m 2023-12-31T09:14:46.19
IV.CRMI.HNE. ML:2.0 0.0001435047 0.8896 AML other m 2023-12-31T09:14:58.33
IV.CRMI.HNN. ML:2.3 0.0003336292 1.5488 AML other m 2023-12-31T09:14:55.06
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