Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 20-04-2023 and time 05:12:10 (Italy) in region 4 km W Gubbio (PG)

A magnitude ML 1.6 earthquake occured in region: 4 km W Gubbio (PG), on

  • 20-04-2023 03:12:10 (UTC)
  • 20-04-2023 05:12:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3730, 12.5320 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
Gubbio PG 4 32216 32216
Pietralunga PG 11 2111 34327
Scheggia e Pascelupo PG 12 1393 35720
Cantiano PU 14 2245 37965
Costacciaro PG 15 1216 39181
Montone PG 17 1680 40861
Sigillo PG 18 2404 43265
Umbertide PG 18 16681 59946

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NE of Perugia (166134 inhabitants)
48 Km NW of Foligno (57155 inhabitants)
53 Km E of Arezzo (99543 inhabitants)
66 Km SW of Fano (60888 inhabitants)
67 Km SW of Pesaro (94582 inhabitants)
77 Km S of Rimini (147750 inhabitants)
84 Km W of Ancona (100861 inhabitants)
88 Km S of Cesena (96758 inhabitants)
91 Km N of Terni (111501 inhabitants)
97 Km E of Siena (53903 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 1.6 2023-04-20
03:12:10		 43.3733 12.5317 9 2024-03-01
17:18:07		 Bollettino Sismico Italiano INGV 117246871
Reviewed
Rev100 		ML 1.5 2023-04-20
03:12:10		 43.3775 12.5357 8 2023-04-20
03:24:32		 Sala Sismica INGV-Roma 116536261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-20 03:12:10 ± 0.03
Latitude 43.3733 ± 0.0018
Longitude 12.5317 ± 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 117246871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 230
Semi-minor axis of confidence ellipse (meter) 134
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45
Number of associated phases, regardless of their use for origin computation 54
Number of defining phases 54
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.02968
Epicentral distance of station farthest from the epicenter (degree) 0.74914
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 31
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 54
Type of magnitude ML
Reference to an origin 117246871
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-01-26 13:37:17

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 48
Type of magnitude ML
Reference to an origin 116536261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-20 03:24:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MML1.EHZ. 2023-04-20T03:12:25.83 0.6 undecidable manual S 129 45.7209 50 0.4 44
IV.MMO1.EHZ. 2023-04-20T03:12:24.84 0.3 undecidable manual P 129 83.1501 50 0.05 66
IV.NRCA.HHZ. 2023-04-20T03:12:23.66 0.3 undecidable manual P 142 76.2681 50 -0.07 66
IV.ASSB.HHZ. 2023-04-20T03:12:23.32 0.6 undecidable manual S 164 38.1285 50 -0.07 47
IV.MPAG.EHZ. 2023-04-20T03:12:22.09 0.3 undecidable manual S 33 33.8439 50 -0.15 71
IV.SNTG.HHZ. 2023-04-20T03:12:22.54 0.6 undecidable manual S 112 35.5422 50 -0.16 47
IV.MGAB.HHZ. 2023-04-20T03:12:21.50 0.3 undecidable manual P 214 61.3941 50 0.06 68
IV.BADI.EHZ. 2023-04-20T03:12:20.38 0.6 undecidable manual S 303 27.6501 108 0.01 49
IV.CING.HHZ. 2023-04-20T03:12:20.35 0.3 undecidable manual P 89 53.502 50 0.12 68
IV.NARO.HHZ. 2023-04-20T03:12:19.85 0.3 undecidable manual S 8 26.6511 109 -0.19 71
IV.ATCC.EHZ. 2023-04-20T03:12:19.31 0.6 undecidable manual S 157 22.6551 112 0.58 43
IV.MML1.EHZ. 2023-04-20T03:12:19.02 0.3 undecidable manual P 129 45.7209 50 -0.01 71
IV.EL6.EHZ. 2023-04-20T03:12:19.28 0.3 undecidable manual P 96 46.2204 50 0.17 69
IV.CAFI.HHZ. 2023-04-20T03:12:19.08 0.1 undecidable manual P 264 45.8208 50 0.03 94
IV.PARC.HHZ. 2023-04-20T03:12:18.03 0.3 undecidable manual P 322 38.628 50 0.1 71
IV.FRON.EHZ. 2023-04-20T03:12:18.48 0.6 undecidable manual S 44 22.3554 112 -0.17 48
IV.APEC.HHZ. 2023-04-20T03:12:18.74 0.6 undecidable manual S 336 22.4553 112 0.07 49
IV.ATMI.HHZ. 2023-04-20T03:12:18.34 0.6 undecidable manual S 259 21.6672 112 -0.09 49
IV.FOSV.EHZ. 2023-04-20T03:12:18.28 0.3 undecidable manual S 115 20.4684 114 0.25 71
IV.SSFR.HHZ. 2023-04-20T03:12:18.29 0.3 undecidable manual S 71 21.3675 113 -0.04 74
IV.ARVD.HHZ. 2023-04-20T03:12:17.30 0.1 undecidable manual P 67 35.8419 50 -0.2 93
IV.PIEI.HHZ. 2023-04-20T03:12:17.45 0.3 undecidable manual S 1 18.0708 116 0.18 72
IV.ASSB.HHZ. 2023-04-20T03:12:17.55 0.1 undecidable manual P 164 38.1285 50 -0.3 90
IV.SNTG.HHZ. 2023-04-20T03:12:17.18 0.3 undecidable manual P 112 35.5422 50 -0.27 69
IV.ATSC.EHE. 2023-04-20T03:12:16.06 0.6 undecidable manual S 66 13.6752 123 0.1 49
IV.ATPC.HHE. 2023-04-20T03:12:16.14 0.6 undecidable manual S 333 13.3755 124 0.28 47
IV.TSM5.DHN. 2023-04-20T03:12:16.11 0.6 undecidable manual S 26 13.0758 124 0.31 47
IV.BADI.EHZ. 2023-04-20T03:12:16.09 0.1 undecidable manual P 303 27.6501 108 -0.02 98
IV.MPAG.EHZ. 2023-04-20T03:12:16.98 0.3 undecidable manual P 33 33.8439 50 -0.21 70
IV.ATCC.EHZ. 2023-04-20T03:12:15.32 0.3 undecidable manual P 157 22.6551 112 0.16 72
IV.NARO.HHZ. 2023-04-20T03:12:15.65 0.1 undecidable manual P 8 26.6511 109 -0.27 93
IV.MURB.HHZ. 2023-04-20T03:12:15.75 0.3 undecidable manual S 183 12.2766 126 0.2 72
IV.FRON.EHZ. 2023-04-20T03:12:15.01 0.3 undecidable manual P 44 22.3554 112 -0.11 73
IV.ATBU.EHZ. 2023-04-20T03:12:15.72 0.6 undecidable manual S 7 11.4774 128 0.39 46
IV.ATPI.EHZ. 2023-04-20T03:12:15.99 0.3 undecidable manual S 310 13.4754 123 0.08 74
IV.APEC.HHZ. 2023-04-20T03:12:15.13 0.3 undecidable manual P 336 22.4553 112 0 74
IV.FOSV.EHZ. 2023-04-20T03:12:14.71 0.3 undecidable manual P 115 20.4684 114 -0.05 74
IV.PIEI.HHZ. 2023-04-20T03:12:14.36 0.1 undecidable manual P 1 18.0708 116 0.04 99
IV.ATVO.HHZ. 2023-04-20T03:12:14.70 0.6 undecidable manual S 276 10.0788 131 -0.28 48
IV.SSFR.HHZ. 2023-04-20T03:12:14.92 0.3 undecidable manual P 71 21.3675 113 -0.01 74
IV.ATMI.HHZ. 2023-04-20T03:12:14.98 0.1 undecidable manual P 259 21.6672 112 -0.01 99
IV.ATFO.HHZ. 2023-04-20T03:12:13.10 0.3 undecidable manual S 103 3.2967 160 -0.49 69
IV.ATPI.EHZ. 2023-04-20T03:12:13.62 0.3 undecidable manual P 310 13.4754 123 0.09 74
IV.TSM1.DHE. 2023-04-20T03:12:13.60 0.6 undecidable manual S 120 6.1938 145 -0.45 46
IV.ATSC.EHE. 2023-04-20T03:12:13.74 0.1 undecidable manual P 66 13.6752 123 0.18 97
IV.ATVO.HHZ. 2023-04-20T03:12:13.05 0.3 undecidable manual P 276 10.0788 131 0.06 75
IV.ATPC.HHE. 2023-04-20T03:12:13.67 0.1 undecidable manual P 333 13.3755 124 0.16 97
IV.MURB.HHZ. 2023-04-20T03:12:13.53 0.3 undecidable manual P 183 12.2766 126 0.21 72
IV.ATBU.EHZ. 2023-04-20T03:12:13.48 0.1 undecidable manual P 7 11.4774 128 0.28 95
IV.TSM5.DHN. 2023-04-20T03:12:13.70 0.1 undecidable manual P 26 13.0758 124 0.23 96
IV.TSM2.DHN. 2023-04-20T03:12:12.09 0.1 undecidable manual P 307 4.1958 155 -0.18 98
IV.ATFO.HHZ. 2023-04-20T03:12:12.07 0.1 undecidable manual P 103 3.2967 160 -0.13 100
IV.TSM1.DHE. 2023-04-20T03:12:12.38 0.1 undecidable manual P 120 6.1938 145 -0.08 100
IV.TSM2.DHN. 2023-04-20T03:12:12.97 0.6 undecidable manual S 307 4.1958 155 -0.75 42
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHE. ML:2.2 0.001955 1.68 AML other m 2023-04-20T03:12:14.10
IV.ATVO.HNE. ML:2.1 0.001825 1.68 AML other m 2023-04-20T03:12:14.10
IV.ATVO.HHN. ML:1.9 0.001175 0.1 AML other m 2023-04-20T03:12:14.95
IV.ATVO.HNN. ML:1.9 0.0011175 0.1 AML other m 2023-04-20T03:12:14.95
IV.MURB.HNE. ML:2.0 0.0012200000000000002 0.3 AML other m 2023-04-20T03:12:16.44
IV.MURB.HHE. ML:2.1 0.00143 0.2 AML other m 2023-04-20T03:12:16.44
IV.MURB.HHN. ML:2.1 0.00158 0.66 AML other m 2023-04-20T03:12:16.58
IV.MURB.HNN. ML:2.0 0.001273 0.66 AML other m 2023-04-20T03:12:16.58
IV.ATPI.EHN. ML:1.5 0.00032250000000000003 0.18 AML other m 2023-04-20T03:12:16.71
IV.PIEI.HHN. ML:1.7 0.0004605 1.76 AML other m 2023-04-20T03:12:17.09
IV.PIEI.HHE. ML:1.8 0.0005204999999999999 0.28 AML other m 2023-04-20T03:12:18.24
IV.PIEI.HNE. ML:1.8 0.0005574999999999999 0.3 AML other m 2023-04-20T03:12:18.09
IV.ATPI.EHE. ML:1.3 0.00022849999999999997 1.14 AML other m 2023-04-20T03:12:18.89
IV.PIEI.HNN. ML:1.6 0.00032900000000000003 0.26 AML other m 2023-04-20T03:12:18.44
IV.APEC.HHE. ML:1.5 0.000223 0.32 AML other m 2023-04-20T03:12:19.21
IV.SSFR.HHN. ML:1.9 0.000564 1.74 AML other m 2023-04-20T03:12:19.12
IV.FRON.EHE. ML:1.3 0.000146 1.56 AML other m 2023-04-20T03:12:19.98
IV.SSFR.HHE. ML:2.0 0.0008160000000000001 0.2 AML other m 2023-04-20T03:12:19.21
IV.SSFR.HNE. ML:2.1 0.0009365 0.26 AML other m 2023-04-20T03:12:19.22
IV.ATCC.HNN. ML:1.9 0.0004955 0.1 AML other m 2023-04-20T03:12:19.55
IV.APEC.HHN. ML:1.5 0.0002055 0.92 AML other m 2023-04-20T03:12:19.50
IV.ATCC.EHE. ML:1.8 0.0004425 0.08 AML other m 2023-04-20T03:12:19.59
IV.ATCC.HNE. ML:1.8 0.0004 0.1 AML other m 2023-04-20T03:12:19.60
IV.ATCC.EHN. ML:1.8 0.00040849999999999995 0.6 AML other m 2023-04-20T03:12:19.55
IV.NARO.HHE. ML:1.4 0.000129 0.7 AML other m 2023-04-20T03:12:20.53
IV.SSFR.HNN. ML:2.0 0.0006975 0.96 AML other m 2023-04-20T03:12:20.20
IV.FRON.EHN. ML:1.7 0.0003085 0.66 AML other m 2023-04-20T03:12:20.06
IV.NARO.HHN. ML:1.4 0.0001525 0.06 AML other m 2023-04-20T03:12:20.51
IV.FOSV.EHE. ML:1.0 0.00007505000000000001 1.02 AML other m 2023-04-20T03:12:20.54
IV.FOSV.EHN. ML:1.2 0.0001225 0.26 AML other m 2023-04-20T03:12:20.64
IV.BADI.EHE. ML:2.2 0.0007905 0.18 AML other m 2023-04-20T03:12:20.66
IV.BADI.EHN. ML:1.8 0.00031000000000000005 0.42 AML other m 2023-04-20T03:12:20.66
IV.ATMI.HHE. ML:1.4 0.00017299999999999998 0.66 AML other m 2023-04-20T03:12:21.73
IV.ATMI.HHN. ML:1.4 0.000194 0.42 AML other m 2023-04-20T03:12:22.10
IV.MPAG.EHN. ML:1.2 0.00006755 1.04 AML other m 2023-04-20T03:12:22.25
IV.SNTG.HHN. ML:1.6 0.00017299999999999998 0.28 AML other m 2023-04-20T03:12:22.99
IV.SNTG.HHE. ML:1.5 0.00011549999999999999 0.24 AML other m 2023-04-20T03:12:23.15
IV.ASSB.HHE. ML:1.4 0.0000964 0.74 AML other m 2023-04-20T03:12:24.68
IV.ARVD.HHN. ML:1.2 0.0000658 0.1 AML other m 2023-04-20T03:12:24.38
IV.ASSB.HHN. ML:1.4 0.0000925 0.42 AML other m 2023-04-20T03:12:24.46
IV.ARVD.HHE. ML:1.4 0.00009795000000000001 0.56 AML other m 2023-04-20T03:12:24.42
IV.PARC.HHN. ML:1.2 0.00005685 0.28 AML other m 2023-04-20T03:12:25.22
IV.MPAG.EHE. ML:1.1 0.00005305 0.7 AML other m 2023-04-20T03:12:25.54
IV.MML1.EHN. ML:1.3 0.00006245 0.2 AML other m 2023-04-20T03:12:26.22
IV.PARC.HHE. ML:1.1 0.0000466 0.18 AML other m 2023-04-20T03:12:26.51
IV.MML1.EHE. ML:1.4 0.00007014999999999998 1.36 AML other m 2023-04-20T03:12:26.76
IV.CAFI.HHN. ML:0.9 0.0000247 1.56 AML other m 2023-04-20T03:12:27.04
IV.CAFI.HHE. ML:0.9 0.000026249999999999998 0.14 AML other m 2023-04-20T03:12:28.44
IV.CING.HHN. ML:1.3 0.000046399999999999996 1.74 AML other m 2023-04-20T03:12:29.07
IV.CING.HHE. ML:1.0 0.000025300000000000002 0.7 AML other m 2023-04-20T03:12:32.20
IV.MGAB.HHE. ML:1.5 0.00006165000000000001 1.34 AML other m 2023-04-20T03:12:32.73
IV.MGAB.HHN. ML:1.5 0.00006934999999999999 1.12 AML other m 2023-04-20T03:12:34.82
IV.NRCA.HHN. ML:1.2 0.0000257 0.52 AML other m 2023-04-20T03:12:34.88
IV.NRCA.HHE. ML:1.2 0.00002485 0.18 AML other m 2023-04-20T03:12:34.91
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