Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 04-04-2023 and time 23:43:12 (Italy) in region 5 km NW Ussita (MC)

A magnitude ML 1.3 earthquake occured in region: 5 km NW Ussita (MC), on

  • 04-04-2023 21:43:12 (UTC)
  • 04-04-2023 23:43:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9880, 13.1130 at 8 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
Ussita MC 5 444 444
Fiordimonte MC 6 202 646
Fiastra MC 7 559 1205
Visso MC 7 1107 2312
Acquacanina MC 7 121 2433
Pieve Torina MC 8 1458 3891
Pievebovigliana MC 9 866 4757
Monte Cavallo MC 9 145 4902
Bolognola MC 9 142 5044
Castelsantangelo sul Nera MC 11 281 5325
Muccia MC 12 915 6240
Preci PG 13 724 6964
Serravalle di Chienti MC 16 1070 8034
Sarnano MC 16 3264 11298
Camerino MC 17 6974 18272
Cessapalombo MC 18 512 18784
Sellano PG 19 1079 19863
Caldarola MC 19 1823 21686
Montefortino FM 19 1178 22864
Amandola FM 20 3629 26493

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
60 Km E of Perugia (166134 inhabitants)
61 Km NW of Teramo (54892 inhabitants)
61 Km NE of Terni (111501 inhabitants)
75 Km NW of L'Aquila (69753 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
96 Km S of Fano (60888 inhabitants)
100 Km NW of Montesilvano (53738 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 1.3 2023-04-04
21:43:12		 42.988 13.1127 8 2023-04-04
21:47:45		 Sala Sismica INGV-Roma 116074001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-04 21:43:12 ± 0.12
Latitude 42.9880 ± 0.0054
Longitude 13.1127 ± 0.0061
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 116074001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 498
Semi-minor axis of confidence ellipse (meter) 354
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 42
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.05216
Epicentral distance of station farthest from the epicenter (degree) 0.39210
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:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 116074001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-04 21:47:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HHZ. 2023-04-04T21:43:27.47 0.6 undecidable manual S 9 43.5231 50 0 64
IV.EL6.EHZ. 2023-04-04T21:43:25.61 0.3 undecidable manual S 359 37.8288 50 -0.36 90
IV.MF5.EHZ. 2023-04-04T21:43:23.60 0.3 undecidable manual S 90 28.1496 106 0.75 81
IV.CING.HHZ. 2023-04-04T21:43:21.51 0.6 undecidable manual P 9 43.5231 50 0.28 61
IV.EL6.EHZ. 2023-04-04T21:43:20.34 0.6 undecidable manual P 359 37.8288 50 -0.02 65
IV.GUMA.HHZ. 2023-04-04T21:43:20.57 0.3 undecidable manual S 65 19.869 112 0.45 91
IV.NRCA.HHZ. 2023-04-04T21:43:19.53 0.3 undecidable manual S 180 17.1717 115 0.28 95
IV.CESI.HHZ. 2023-04-04T21:43:19.60 0.3 undecidable manual S 276 16.9719 115 0.39 93
IV.MML1.EHZ. 2023-04-04T21:43:19.86 0.3 undecidable manual S 321 17.9709 114 0.33 94
IV.MMO1.EHZ. 2023-04-04T21:43:19.62 0.3 undecidable manual S 119 19.9689 112 -0.54 89
IV.MF5.EHZ. 2023-04-04T21:43:18.70 0.3 undecidable manual P 90 28.1496 106 0.14 96
IV.CSP1.EHZ. 2023-04-04T21:43:18.13 0.3 undecidable manual S 33 13.6752 120 -0.07 100
IV.GUMA.HHZ. 2023-04-04T21:43:17.25 0.6 undecidable manual P 65 19.869 112 0.26 63
IV.MML1.EHZ. 2023-04-04T21:43:16.74 0.3 undecidable manual P 321 17.9709 114 0.1 99
IV.MMO1.EHZ. 2023-04-04T21:43:16.58 0.3 negative manual P 119 19.9689 112 -0.43 92
IV.NRCA.HHZ. 2023-04-04T21:43:16.26 0.3 positive manual P 180 17.1717 115 -0.23 96
IV.CESI.HHZ. 2023-04-04T21:43:16.51 0.3 positive manual P 276 16.9719 115 0.05 100
IV.CSP1.EHZ. 2023-04-04T21:43:15.63 0.3 positive manual P 33 13.6752 120 -0.25 96
IV.FDMO.HHZ. 2023-04-04T21:43:15.63 0.3 undecidable manual S 339 5.7942 144 -0.47 93
IV.FDMO.HHZ. 2023-04-04T21:43:14.27 0.3 positive manual P 339 5.7942 144 -0.39 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.0 0.00019217410000000001 0.128 AML other m 2023-04-04T21:43:16.28
IV.NRCA.HHN. ML:0.9 0.00007527414000000001 0.1792 AML other m 2023-04-04T21:43:20.63
IV.CESI.HHN. ML:1.2 0.00013450000000000002 0.36 AML other m 2023-04-04T21:43:20.39
IV.CESI.HHE. ML:1.1 0.00010675607499999999 0.2176 AML other m 2023-04-04T21:43:20.05
IV.NRCA.HHE. ML:1.1 0.00010819999999999999 0.16 AML other m 2023-04-04T21:43:21.11
IV.CSP1.EHE. ML:1.3 0.0002129235 0.1664 AML other m 2023-04-04T21:43:18.24
IV.CSP1.EHN. ML:1.6 0.00039337675 0.2816 AML other m 2023-04-04T21:43:18.70
IV.NRCA.HNE. ML:1.1 0.000110915445 0.1536 AML other m 2023-04-04T21:43:20.42
IV.NRCA.HNN. ML:1.2 0.0001608941 0.6272 AML other m 2023-04-04T21:43:26.16
IV.CESI.HNE. ML:1.0 0.000091420186 0.4608 AML other m 2023-04-04T21:43:22.04
IV.CESI.HNN. ML:1.2 0.00013651684999999998 0.2816 AML other m 2023-04-04T21:43:20.27
IV.MML1.EHE. ML:0.7 0.000038794730499999996 0.2176 AML other m 2023-04-04T21:43:22.11
IV.MML1.EHN. ML:0.8 0.000060076729999999996 0.128 AML other m 2023-04-04T21:43:20.45
IV.MML1.HNE. ML:1.2 0.00012784975500000002 0.9088 AML other m 2023-04-04T21:43:26.51
IV.MML1.HNN. ML:1.3 0.0001559119 1.0624 AML other m 2023-04-04T21:43:19.11
IV.GUMA.HHE. ML:1.4 0.00018121905 0.5632 AML other m 2023-04-04T21:43:25.79
IV.GUMA.HHN. ML:1.3 0.00016572239999999998 0.4992 AML other m 2023-04-04T21:43:24.19
IV.GUMA.HNE. ML:1.5 0.00025245925 0.4992 AML other m 2023-04-04T21:43:26.07
IV.GUMA.HNN. ML:1.4 0.00018045345 0.9728 AML other m 2023-04-04T21:43:18.48
IV.MF5.EHE. ML:1.5 0.000182480365 1.152 AML other m 2023-04-04T21:43:23.29
IV.MF5.EHN. ML:1.5 0.00016585365000000002 2.6624 AML other m 2023-04-04T21:43:20.27
IV.EL6.EHE. ML:1.5 0.000110857 1.4976 AML other m 2023-04-04T21:43:32.44
IV.EL6.EHN. ML:1.5 0.000111027845 1.728 AML other m 2023-04-04T21:43:25.26
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