Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 04-01-2023 and time 12:47:09 (UTC) in region 2 km S Sefro (MC)

A magnitude ML 0.9 earthquake occured in region: 2 km S Sefro (MC), on

  • 04-01-2023 12:47:09 (UTC)
  • 04-01-2023 13:47:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1270, 12.9530 at 9 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
Sefro MC 2 422 422
Serravalle di Chienti MC 6 1070 1492
Pioraco MC 6 1134 2626
Fiuminata MC 7 1402 4028
Muccia MC 9 915 4943
Camerino MC 9 6974 11917
Pieve Torina MC 12 1458 13375
Castelraimondo MC 13 4587 17962
Pievebovigliana MC 13 866 18828
Nocera Umbra PG 13 5839 24667
Esanatoglia MC 14 2034 26701
Fiordimonte MC 15 202 26903
Matelica MC 15 9981 36884
Monte Cavallo MC 15 145 37029
Gagliole MC 16 620 37649
Valtopina PG 18 1398 39047
Gualdo Tadino PG 18 15208 54255
Fiastra MC 19 559 54814

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NE of Foligno (57155 inhabitants)
46 Km E of Perugia (166134 inhabitants)
68 Km NE of Terni (111501 inhabitants)
71 Km SW of Ancona (100861 inhabitants)
80 Km S of Fano (60888 inhabitants)
80 Km NW of Teramo (54892 inhabitants)
87 Km S of Pesaro (94582 inhabitants)
94 Km NW of L'Aquila (69753 inhabitants)
95 Km E of Arezzo (99543 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 0.9 2023-01-04
12:47:09		 43.1272 12.9532 9 2024-03-01
17:18:05		 Bollettino Sismico Italiano INGV 116906241
Reviewed
Rev100 		ML 1.0 2023-01-04
12:47:09		 43.1232 12.9565 11 2023-01-04
13:05:35		 Sala Sismica INGV-Roma 113303101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-04 12:47:09 ± 0.05
Latitude 43.1272 ± 0.0018
Longitude 12.9532 ± 0.0025
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116906241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 209
Semi-minor axis of confidence ellipse (meter) 77
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 68
Circular confidence region, given by single value of horizontal uncertainty (meter) 210.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 37
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43707
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 116906241
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-30 14:22:23

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 113303101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-04 13:05:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GAVE.EHN. 2023-01-04T12:47:25.38 1.0 undecidable manual S 186 48.5181 50 0.29 22
IV.GUMA.HHZ. 2023-01-04T12:47:20.94 0.6 undecidable manual S 103 31.746 50 0.31 46
IV.ATCC.EHZ. 2023-01-04T12:47:19.02 0.6 undecidable manual S 284 26.1516 110 0.07 49
IV.MOMA.HNZ. 2023-01-04T12:47:18.29 1.0 undecidable manual P 221 47.4192 50 0.02 24
IV.EL6.EHZ. 2023-01-04T12:47:18.56 0.3 undecidable manual S 28 25.4523 110 -0.16 72
IV.ASSB.HHZ. 2023-01-04T12:47:18.40 0.6 undecidable manual S 249 25.6521 110 -0.38 46
IV.GAVE.EHN. 2023-01-04T12:47:18.19 1.0 undecidable manual P 186 48.5181 50 -0.23 23
IV.CSP1.EHZ. 2023-01-04T12:47:17.09 0.3 undecidable manual S 101 20.7681 114 -0.12 73
IV.MC2.EHZ. 2023-01-04T12:47:16.05 1.0 undecidable manual P 141 30.6471 50 0.38 23
IV.MDAR.HNZ. 2023-01-04T12:47:16.37 1.0 undecidable manual S 65 16.9719 119 0.33 23
IV.PF6.EHZ. 2023-01-04T12:47:16.50 1.0 undecidable manual S 86 19.5693 116 -0.34 23
IV.CESI.HHZ. 2023-01-04T12:47:15.28 0.3 undecidable manual S 196 14.0748 124 0.09 74
IV.FDMO.HHZ. 2023-01-04T12:47:15.25 0.3 undecidable manual S 133 14.7741 122 -0.14 73
IV.GUMA.HHZ. 2023-01-04T12:47:15.79 0.6 undecidable manual P 103 31.746 50 -0.06 48
IT.MTCL.HGZ. 2023-01-04T12:47:15.42 0.6 undecidable manual S 166 15.2736 122 -0.1 49
IV.SNTG.HHZ. 2023-01-04T12:47:15.33 0.3 undecidable manual S 356 14.2746 123 0.1 74
IV.ASSB.HHZ. 2023-01-04T12:47:14.59 0.6 undecidable manual P 249 25.6521 110 -0.19 48
IV.FOSV.EHZ. 2023-01-04T12:47:14.46 1.0 undecidable manual P 320 24.2535 111 -0.06 24
IV.ATCC.EHZ. 2023-01-04T12:47:14.79 0.6 undecidable manual P 284 26.1516 110 -0.09 48
IV.EL6.EHZ. 2023-01-04T12:47:14.61 0.1 undecidable manual P 28 25.4523 110 -0.14 96
IV.FIU1.HNZ. 2023-01-04T12:47:13.53 0.6 undecidable manual S 346 7.0929 143 0.15 49
IV.PARC.HHZ. 2023-01-04T12:47:13.06 3.0 negative manual P -6.93 0
IV.MDAR.HNZ. 2023-01-04T12:47:13.47 1.0 undecidable manual P 65 16.9719 119 0.27 24
IV.CSP1.EHZ. 2023-01-04T12:47:13.76 0.1 undecidable manual P 101 20.7681 114 -0.11 97
IV.PF6.EHZ. 2023-01-04T12:47:13.56 1.0 undecidable manual P 86 19.5693 116 -0.1 24
IV.MML1.EHZ. 2023-01-04T12:47:12.83 0.3 undecidable manual S 135 2.0979 167 0.18 74
IV.CESI.HHZ. 2023-01-04T12:47:12.84 0.3 positive manual P 196 14.0748 124 0.13 74
IV.SEF1.HNZ. 2023-01-04T12:47:12.71 1.0 undecidable manual S 348 2.1978 167 0.06 25
IV.FDMO.HHZ. 2023-01-04T12:47:12.79 0.1 undecidable manual P 133 14.7741 122 -0.03 100
IT.MTCL.HGZ. 2023-01-04T12:47:12.93 1.0 undecidable manual P 166 15.2736 122 0.03 25
IV.SNTG.HHZ. 2023-01-04T12:47:12.84 0.6 positive manual P 356 14.2746 123 0.12 49
IV.SEF1.HNZ. 2023-01-04T12:47:11.48 1.0 undecidable manual P 348 2.1978 167 0.24 24
IV.FIU1.HNZ. 2023-01-04T12:47:11.45 1.0 undecidable manual P 346 7.0929 143 -0.21 24
IV.MML1.EHZ. 2023-01-04T12:47:11.51 0.6 negative manual P 135 2.0979 167 0.28 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.3 0.0001915 0.08 AML other m 2023-01-04T12:47:15.40
IV.FDMO.HHE. ML:0.7 0.000045400000000000006 0.14 AML other m 2023-01-04T12:47:15.39
IV.SNTG.HHN. ML:1.0 0.00008999999999999999 0.74 AML other m 2023-01-04T12:47:15.50
IV.SNTG.HHE. ML:1.0 0.00008955000000000001 0.1 AML other m 2023-01-04T12:47:15.58
IV.FDMO.HHN. ML:0.6 0.000034750000000000004 0.72 AML other m 2023-01-04T12:47:15.75
IV.CESI.HHN. ML:1.1 0.0001175 0.52 AML other m 2023-01-04T12:47:15.51
IV.ASSB.HHE. ML:0.8 0.0000348 0.42 AML other m 2023-01-04T12:47:18.83
IV.ARVD.HHE. ML:0.8 0.0000224 1.32 AML other m 2023-01-04T12:47:18.19
IV.ASSB.HHN. ML:0.8 0.0000393 0.22 AML other m 2023-01-04T12:47:18.94
IV.ARVD.HHN. ML:0.8 0.0000196 0.84 AML other m 2023-01-04T12:47:27.51
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