Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 18-01-2023 and time 22:38:10 (Italy) in region 5 km E Premilcuore (FC)

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

  • 18-01-2023 21:38:10 (UTC)
  • 18-01-2023 22:38:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9980, 11.8320 at 26 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 5 799 799
Portico e San Benedetto FC 5 756 1555
Galeata FC 6 2516 4071
Rocca San Casciano FC 7 1910 5981
Santa Sofia FC 8 4136 10117
Civitella di Romagna FC 9 3786 13903
Tredozio FC 12 1212 15115
Dovadola FC 15 1653 16768
Predappio FC 17 6346 23114
Modigliana FC 18 4560 27674
San Godenzo FI 19 1167 28841
Bagno di Romagna FC 19 6026 34867
Marradi FI 20 3139 38006

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Forlì (117913 inhabitants)
32 Km S of Faenza (58541 inhabitants)
36 Km W of Cesena (96758 inhabitants)
41 Km S of Imola (69797 inhabitants)
53 Km E of Firenze (382808 inhabitants)
55 Km SW of Ravenna (159116 inhabitants)
59 Km E of Scandicci (50609 inhabitants)
59 Km W of Rimini (147750 inhabitants)
59 Km N of Arezzo (99543 inhabitants)
60 Km E of Prato (191150 inhabitants)
68 Km SE of Bologna (386663 inhabitants)
74 Km E of Pistoia (90315 inhabitants)
86 Km NE of Siena (53903 inhabitants)
87 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
Bulletin
Rev1000 		ML 1.5 2023-01-18
21:38:10		 43.9983 11.832 26 2024-03-01
17:18:14		 Bollettino Sismico Italiano INGV 119994021
Reviewed
Rev100 		ML 1.4 2023-01-18
21:38:10		 43.9898 11.8287 26 2023-01-18
21:44:42		 Sala Sismica INGV-Roma 113667981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-18 21:38:10 ± 0.19
Latitude 43.9983 ± 0.0054
Longitude 11.8320 ± 0.0088
Depth (km) 26 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 119994021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 648
Semi-minor axis of confidence ellipse (meter) 269
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 261
Circular confidence region, given by single value of horizontal uncertainty (meter) 650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
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) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.09443
Epicentral distance of station farthest from the epicenter (degree) 0.65471
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 119994021
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-10 08:26:10

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 113667981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-18 21:44:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHZ. 2023-01-18T21:38:25.10 0.3 undecidable manual S 167 43.2234 114 0.24 70
IV.CSNT.HHZ. 2023-01-18T21:38:23.36 0.3 undecidable manual P 217 72.6717 104 0.44 63
IV.RUFI.EHZ. 2023-01-18T21:38:22.10 0.3 undecidable manual S 235 31.3464 123 0.02 74
IV.BRIS.HHZ. 2023-01-18T21:38:21.40 0.3 undecidable manual S 348 25.6521 130 0.54 66
IV.VMGN.HHZ. 2023-01-18T21:38:20.90 0.3 undecidable manual S 259 24.3534 131 0.29 72
Y1.T1756.HNZ. 2023-01-18T21:38:20.49 0.3 undecidable manual S 72 22.5552 134 0.24 71
IV.SFI.EHZ. 2023-01-18T21:38:18.50 0.3 undecidable manual S 173 10.4784 155 0.16 75
IV.SEI.HHZ. 2023-01-18T21:38:18.20 0.6 undecidable manual P 279 38.2284 117 0.29 46
IV.LMD.HHZ. 2023-01-18T21:38:18.30 0.3 undecidable manual S 311 13.2756 149 -0.4 71
IV.CRE.HHZ. 2023-01-18T21:38:18.46 0.1 undecidable manual P 167 43.2234 114 -0.13 95
IV.VISG.HHZ. 2023-01-18T21:38:17.87 0.3 undecidable manual P 304 38.1285 118 -0.02 74
IV.BRIS.HHZ. 2023-01-18T21:38:16.17 0.3 undecidable manual P 348 25.6521 130 -0.11 74
IV.VMGN.HHZ. 2023-01-18T21:38:16.12 0.1 undecidable manual P 259 24.3534 131 -0.02 100
IV.RUFI.EHZ. 2023-01-18T21:38:16.86 0.3 undecidable manual P 235 31.3464 123 -0.13 72
Y1.T1756.HNZ. 2023-01-18T21:38:15.83 0.1 undecidable manual P 72 22.5552 134 -0.1 100
IV.SFI.EHZ. 2023-01-18T21:38:14.63 0.1 undecidable manual P 173 10.4784 155 -0.2 99
IV.LMD.HHZ. 2023-01-18T21:38:14.61 0.1 undecidable manual P 311 13.2756 149 -0.42 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHN. ML:0.0 0.000184 0.3 AML other m 2023-01-18T21:38:18.75
IV.LMD.HHE. ML:0.0 0.000194 1.76 AML other m 2023-01-18T21:38:18.94
IV.SFI.EHE. ML:0.0 0.000226 1.56 AML other m 2023-01-18T21:38:19.01
IV.SFI.EHN. ML:0.0 0.00028700000000000004 1.12 AML other m 2023-01-18T21:38:19.02
IV.BRIS.HHE. ML:0.0 0.0001245 0.44 AML other m 2023-01-18T21:38:21.86
IV.BRIS.HHN. ML:0.0 0.0000826 0.64 AML other m 2023-01-18T21:38:23.88
IV.SEI.HHN. ML:0.0 0.000101864985 0.3328 AML other m 2023-01-18T21:38:24.58
IV.VISG.HHN. ML:0.0 0.000020128085 0.3456 AML other m 2023-01-18T21:38:24.63
IV.CRE.HHN. ML:0.0 0.00006257567 0.2816 AML other m 2023-01-18T21:38:25.88
IV.CRE.HHE. ML:0.0 0.000054856370000000003 0.4864 AML other m 2023-01-18T21:38:25.54
IV.VISG.HHE. ML:0.0 0.000022103440000000002 1.7184 AML other m 2023-01-18T21:38:25.11
IV.SEI.HHE. ML:0.0 0.000046252959999999996 0.4352 AML other m 2023-01-18T21:38:33.29
IV.SFI.HNE. ML:1.7 0.000272082 0.448 AML other m 2023-01-18T21:38:19.01
IV.SFI.HNN. ML:1.7 0.00026771095 0.6016 AML other m 2023-01-18T21:38:19.02
IV.BRIS.HNN. ML:1.6 0.0001640509 0.2816 AML other m 2023-01-18T21:38:22.76
IV.BRIS.HNE. ML:1.9 0.00031827579999999997 0.2816 AML other m 2023-01-18T21:38:21.87
IV.RUFI.EHE. ML:1.2 0.000050513655 0.9216 AML other m 2023-01-18T21:38:21.96
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