Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 18-04-2023 and time 01:45:25 (Italy) in region 4 km SE Pietralunga (PG)

A magnitude ML 1.1 earthquake occured in region: 4 km SE Pietralunga (PG), on

  • 17-04-2023 23:45:25 (UTC)
  • 18-04-2023 01:45:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4230, 12.4840 at 8 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
Pietralunga PG 4 2111 2111
Gubbio PG 11 32216 34327
Cantiano PU 13 2245 36572
Montone PG 14 1680 38252
Scheggia e Pascelupo PG 15 1393 39645
Apecchio PU 16 1882 41527
Umbertide PG 18 16681 58208
Piobbico PU 19 2029 60237
Cagli PU 19 8731 68968
Costacciaro PG 20 1216 70184

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km N of Perugia (166134 inhabitants)
49 Km E of Arezzo (99543 inhabitants)
55 Km NW of Foligno (57155 inhabitants)
64 Km SW of Fano (60888 inhabitants)
64 Km SW of Pesaro (94582 inhabitants)
71 Km S of Rimini (147750 inhabitants)
82 Km S of Cesena (96758 inhabitants)
86 Km W of Ancona (100861 inhabitants)
94 Km E of Siena (53903 inhabitants)
96 Km SE of Forlì (117913 inhabitants)
97 Km N of Terni (111501 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 1.1 2023-04-17
23:45:25		 43.4232 12.4837 8 2024-03-01
17:18:08		 Bollettino Sismico Italiano INGV 117292141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-17 23:45:25 ± 0.04
Latitude 43.4232 ± 0.0018
Longitude 12.4837 ± 0.0025
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117292141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 191
Semi-minor axis of confidence ellipse (meter) 93
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 161
Circular confidence region, given by single value of horizontal uncertainty (meter) 190.0
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 61
Number of defining phases 61
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) 0.02698
Epicentral distance of station farthest from the epicenter (degree) 0.40110
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 31
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 117292141
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-12 14:58:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SNTG.HHZ. 2023-04-17T23:45:40.25 0.6 undecidable manual S 117 41.3253 50 0.16 46
IV.ASSB.HHZ. 2023-04-17T23:45:40.78 0.6 undecidable manual S 161 44.5221 50 -0.17 45
IV.CAFI.HHZ. 2023-04-17T23:45:40.53 0.6 undecidable manual S 256 43.0236 50 -0.01 47
IV.ARVD.HHZ. 2023-04-17T23:45:39.07 0.6 undecidable manual S 77 37.8288 50 -0.08 47
IV.PARC.HHZ. 2023-04-17T23:45:37.71 0.6 undecidable manual S 322 31.8459 104 0.33 45
IV.MPAG.EHZ. 2023-04-17T23:45:37.05 0.6 undecidable manual S 44 31.8459 104 -0.34 45
IV.ATCC.EHZ. 2023-04-17T23:45:37.03 0.6 undecidable manual S 154 29.2485 106 0.52 43
IV.FOSV.EHZ. 2023-04-17T23:45:35.62 0.6 undecidable manual S 122 26.5512 107 0.01 48
IV.ASSB.HHZ. 2023-04-17T23:45:34.28 0.1 undecidable manual P 161 44.5221 50 -0.34 87
IV.ATMC.EHZ. 2023-04-17T23:45:34.64 0.6 undecidable manual S 277 23.5542 109 0.01 49
IV.CAFI.HHZ. 2023-04-17T23:45:34.32 0.6 undecidable manual P 256 43.0236 50 -0.06 46
IV.FRON.EHZ. 2023-04-17T23:45:34.08 0.6 undecidable manual S 62 22.1556 110 -0.08 48
IV.SSFR.HHZ. 2023-04-17T23:45:34.76 0.6 undecidable manual S 86 24.0537 109 -0.05 48
IV.NARO.HHZ. 2023-04-17T23:45:33.77 0.6 undecidable manual S 20 22.2555 110 -0.42 45
IV.SNTG.HHZ. 2023-04-17T23:45:33.95 0.1 undecidable manual P 117 41.3253 50 -0.17 91
IV.ARVD.HHZ. 2023-04-17T23:45:33.44 0.6 undecidable manual P 77 37.8288 50 -0.14 46
IV.APEC.HHZ. 2023-04-17T23:45:32.21 0.6 undecidable manual S 341 15.873 117 0.05 49
IV.PARC.HHZ. 2023-04-17T23:45:32.65 0.1 undecidable manual P 322 31.8459 104 0.09 94
IV.ATSC.EHZ. 2023-04-17T23:45:32.57 0.6 undecidable manual S 90 16.3725 117 0.26 47
IV.MPAG.EHZ. 2023-04-17T23:45:32.30 0.1 undecidable manual P 44 31.8459 104 -0.26 91
IV.ATCC.EHZ. 2023-04-17T23:45:32.23 0.1 undecidable manual P 154 29.2485 106 0.17 93
IV.MURB.HHZ. 2023-04-17T23:45:32.64 0.6 undecidable manual S 169 18.0708 114 -0.21 47
IV.ATMI.HHZ. 2023-04-17T23:45:32.99 0.6 undecidable manual S 240 19.9689 112 -0.47 44
IV.SSFR.HHZ. 2023-04-17T23:45:31.21 0.6 undecidable manual P 86 24.0537 109 0.14 47
IV.PIEI.HHZ. 2023-04-17T23:45:31.63 0.6 undecidable manual S 18 13.1757 122 0.29 47
IV.FOSV.EHZ. 2023-04-17T23:45:31.46 1.0 undecidable manual P 122 26.5512 107 -0.07 24
IV.ATLO.EHZ. 2023-04-17T23:45:31.66 0.6 undecidable manual S 207 13.4754 121 0.22 47
IV.TSM1.DHZ. 2023-04-17T23:45:31.27 0.6 undecidable manual S 133 12.5763 123 0.09 49
IV.TSM5.DHZ.01 2023-04-17T23:45:31.24 0.6 undecidable manual S 57 11.4774 126 0.39 46
IV.MURB.HHZ. 2023-04-17T23:45:30.17 0.1 positive manual P 169 18.0708 114 0.23 94
IV.TB02.DHZ.01 2023-04-17T23:45:30.12 0.6 undecidable manual S 226 8.3805 134 0.08 49
IV.ATMI.HHZ. 2023-04-17T23:45:30.38 0.6 positive manual P 240 19.9689 112 0.09 48
IV.TSM3.DHZ.01 2023-04-17T23:45:30.98 0.6 undecidable manual S 247 11.2776 126 0.18 48
IV.ATMC.EHZ. 2023-04-17T23:45:30.96 0.1 undecidable manual P 277 23.5542 109 -0.01 97
IV.NARO.HHZ. 2023-04-17T23:45:30.50 0.1 undecidable manual P 20 22.2555 110 -0.22 93
IV.ATVA.EHZ. 2023-04-17T23:45:30.98 0.1 undecidable manual P 225 22.6551 110 0.18 94
IV.FRON.EHZ. 2023-04-17T23:45:30.62 0.3 positive manual P 62 22.1556 110 -0.08 72
IV.ATBU.EHZ. 2023-04-17T23:45:30.05 0.6 undecidable manual S 42 7.7811 136 0.15 49
IV.ATFO.HHZ. 2023-04-17T23:45:30.11 0.6 undecidable manual S 132 9.4794 131 -0.2 48
IV.TB03.DHZ.25 2023-04-17T23:45:29.22 0.6 undecidable manual S 248 6.3936 142 -0.36 47
IV.TSM5.DHZ.01 2023-04-17T23:45:29.02 0.1 undecidable manual P 57 11.4774 126 0.23 95
IV.TB01.DHZ.01 2023-04-17T23:45:29.36 0.6 undecidable manual S 220 5.994 144 -0.14 49
IV.PIEI.HHZ. 2023-04-17T23:45:29.23 0.1 negative manual P 18 13.1757 122 0.15 96
IV.ATPI.EHZ. 2023-04-17T23:45:29.65 0.6 undecidable manual S 295 7.1928 139 -0.12 49
IV.ATPC.HNZ. 2023-04-17T23:45:29.51 0.6 undecidable manual S 341 6.6933 141 -0.14 49
IV.APEC.HHZ. 2023-04-17T23:45:29.61 0.1 undecidable manual P 341 15.873 117 0.06 97
IV.ATLO.EHZ. 2023-04-17T23:45:29.31 0.1 undecidable manual P 207 13.4754 121 0.18 95
IV.ATSC.EHZ. 2023-04-17T23:45:29.76 0.1 undecidable manual P 90 16.3725 117 0.13 96
IV.ATVO.HHZ. 2023-04-17T23:45:29.72 0.6 undecidable manual S 234 7.6812 137 -0.15 48
IV.ATPI.EHZ. 2023-04-17T23:45:28.20 0.1 positive manual P 295 7.1928 139 0.04 99
IV.TSM1.DHZ. 2023-04-17T23:45:28.97 0.1 undecidable manual P 133 12.5763 123 -0.01 99
IV.ATPC.HNZ. 2023-04-17T23:45:28.10 0.1 undecidable manual P 341 6.6933 141 0.01 100
IV.ATBU.EHZ. 2023-04-17T23:45:28.40 0.1 undecidable manual P 42 7.7811 136 0.16 97
IV.ATFO.HHZ. 2023-04-17T23:45:28.60 0.6 undecidable manual P 132 9.4794 131 0.12 49
IV.ATVO.HHZ. 2023-04-17T23:45:28.26 0.1 undecidable manual P 234 7.6812 137 0.04 99
IV.TB03.DHZ.25 2023-04-17T23:45:28.00 0.1 undecidable manual P 248 6.3936 142 -0.05 99
IV.TSM2.DHZ.01 2023-04-17T23:45:28.20 0.3 undecidable manual S 170 2.997 160 -0.8 60
IV.TB02.DHZ.01 2023-04-17T23:45:28.43 0.1 undecidable manual P 226 8.3805 134 0.11 98
IV.TB01.DHZ.01 2023-04-17T23:45:28.04 0.1 undecidable manual P 220 5.994 144 0.03 100
IV.TSM3.DHZ.01 2023-04-17T23:45:28.96 0.1 undecidable manual P 247 11.2776 126 0.2 95
IV.TSM2.DHZ.01 2023-04-17T23:45:27.46 0.1 undecidable manual P 170 2.997 160 -0.26 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.EHE. ML:0.9 0.000144 1.44 AML other m 2023-04-17T23:45:30.96
IV.ATPI.EHN. ML:1.0 0.0001565 0.64 AML other m 2023-04-17T23:45:30.92
IV.ATFO.HHE. ML:1.2 0.0002325 1.8 AML other m 2023-04-17T23:45:31.95
IV.ATFO.HNN. ML:1.2 0.0002475 1.1 AML other m 2023-04-17T23:45:31.16
IV.ATFO.HHN. ML:1.1 0.0001795 0.28 AML other m 2023-04-17T23:45:31.17
IV.ATFO.HNE. ML:1.2 0.000219 0.44 AML other m 2023-04-17T23:45:31.96
IV.PIEI.HHN. ML:1.3 0.0002385 1.82 AML other m 2023-04-17T23:45:32.07
IV.PIEI.HHE. ML:1.3 0.0002405 0.3 AML other m 2023-04-17T23:45:32.41
IV.APEC.HHN. ML:1.2 0.00016049999999999997 0.24 AML other m 2023-04-17T23:45:32.45
IV.APEC.HHE. ML:1.4 0.000245 0.16 AML other m 2023-04-17T23:45:32.74
IV.MURB.HHN. ML:1.5 0.00027600000000000004 0.18 AML other m 2023-04-17T23:45:34.26
IV.NARO.HHN. ML:0.9 0.0000526 0.08 AML other m 2023-04-17T23:45:34.37
IV.MURB.HHE. ML:1.4 0.0002235 0.64 AML other m 2023-04-17T23:45:34.40
IV.MURB.HNE. ML:1.5 0.0002965 0.86 AML other m 2023-04-17T23:45:34.84
IV.NARO.HHE. ML:1.0 0.00006925 0.54 AML other m 2023-04-17T23:45:34.17
IV.FRON.EHE. ML:1.0 0.00007300000000000001 1.1 AML other m 2023-04-17T23:45:34.31
IV.FRON.EHN. ML:1.4 0.000153 0.64 AML other m 2023-04-17T23:45:35.18
IV.MURB.HNN. ML:1.5 0.00026000000000000003 0.68 AML other m 2023-04-17T23:45:35.56
IV.SSFR.HHN. ML:1.2 0.00010650000000000001 0.12 AML other m 2023-04-17T23:45:35.95
IV.SSFR.HHE. ML:1.2 0.00009989999999999999 1.4 AML other m 2023-04-17T23:45:36.10
IV.ATMI.HHE. ML:0.8 0.00005535 1.46 AML other m 2023-04-17T23:45:39.01
IV.ATMI.HHN. ML:0.8 0.0000538 0.88 AML other m 2023-04-17T23:45:40.33
IV.ARVD.HHN. ML:0.7 0.000021691704999999998 0.3968 AML other m 2023-04-17T23:45:39.56
IV.ARVD.HHE. ML:0.8 0.0000228703 0.1664 AML other m 2023-04-17T23:45:39.16
IV.ASSB.HHN. ML:0.8 0.000021899855 0.192 AML other m 2023-04-17T23:45:42.43
IV.ASSB.HHE. ML:0.7 0.000015524397000000002 0.8192 AML other m 2023-04-17T23:45:41.70
IV.CAFI.HHE. ML:0.5 0.000010981871500000001 0.2304 AML other m 2023-04-17T23:45:42.24
IV.CAFI.HHN. ML:0.5 0.000008931831000000001 0.128 AML other m 2023-04-17T23:45:40.80
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