Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 04-04-2023 and time 06:50:13 (Italy) in region 4 km NE Pietralunga (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km NE Pietralunga (PG), on

  • 04-04-2023 04:50:13 (UTC)
  • 04-04-2023 06:50:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4660, 12.4710 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
Pietralunga PG 4 2111 2111
Apecchio PU 11 1882 3993
Cantiano PU 13 2245 6238
Piobbico PU 14 2029 8267
Gubbio PG 15 32216 40483
Montone PG 16 1680 42163
Cagli PU 17 8731 50894
Scheggia e Pascelupo PG 17 1393 52287
Città di Castello PG 19 39913 92200

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km N of Perugia (166134 inhabitants)
48 Km E of Arezzo (99543 inhabitants)
60 Km NW of Foligno (57155 inhabitants)
61 Km SW of Pesaro (94582 inhabitants)
61 Km SW of Fano (60888 inhabitants)
67 Km S of Rimini (147750 inhabitants)
77 Km S of Cesena (96758 inhabitants)
86 Km W of Ancona (100861 inhabitants)
91 Km SE of Forlì (117913 inhabitants)
93 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
Reviewed
Rev100 		ML 1.0 2023-04-04
04:50:13		 43.4662 12.4713 8 2023-04-04
04:59:45		 Sala Sismica INGV-Roma 116053791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-04 04:50:13 ± 0.13
Latitude 43.4662 ± 0.0018
Longitude 12.4713 ± 0.0037
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 116053791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 245
Semi-minor axis of confidence ellipse (meter) 198
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 112
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.05216
Epicentral distance of station farthest from the epicenter (degree) 0.22753
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 116053791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-04 04:59:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2023-04-04T04:50:23.00 0.6 undecidable manual S 97 25.2525 107 0.17 48
IV.MURB.HHZ. 2023-04-04T04:50:22.46 0.6 undecidable manual S 169 22.9548 109 0.4 45
IV.FRON.EHZ. 2023-04-04T04:50:21.50 0.3 undecidable manual S 74 21.2676 110 -0.01 74
IV.NARO.HHZ. 2023-04-04T04:50:20.53 0.3 undecidable manual S 29 18.2706 113 -0.02 74
IV.ATFO.HHZ. 2023-04-04T04:50:19.11 0.3 undecidable manual S 144 13.6752 119 0 75
IV.APEC.HHZ. 2023-04-04T04:50:18.52 0.3 undecidable manual S 338 11.0778 125 0.19 73
IV.MURB.HHZ. 2023-04-04T04:50:18.52 0.6 negative manual P 169 22.9548 109 0.01 49
IV.SSFR.HHZ. 2023-04-04T04:50:18.87 0.6 undecidable manual P 97 25.2525 107 -0.08 48
IV.ATVO.HHZ. 2023-04-04T04:50:18.18 0.3 undecidable manual S 209 10.6782 126 -0.05 75
IV.NARO.HHZ. 2023-04-04T04:50:17.50 0.1 undecidable manual P 29 18.2706 113 -0.14 97
IV.FRON.EHZ. 2023-04-04T04:50:17.98 0.6 undecidable manual P 74 21.2676 110 -0.21 48
IV.ATVO.HHZ. 2023-04-04T04:50:16.25 0.1 positive manual P 209 10.6782 126 -0.05 100
IV.APEC.HHZ. 2023-04-04T04:50:16.53 0.1 undecidable manual P 338 11.0778 125 0.17 97
IV.ATPI.EHZ. 2023-04-04T04:50:16.88 0.3 undecidable manual S 253 5.7942 143 -0.13 74
IV.ATFO.HHZ. 2023-04-04T04:50:16.74 0.3 undecidable manual P 144 13.6752 119 -0.07 74
IV.ATPI.EHZ. 2023-04-04T04:50:15.55 0.3 undecidable manual P 253 5.7942 143 -0.05 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APEC.HHN. ML:0.9 0.000114644275 0.0992 AML other m 2023-04-04T04:50:18.84
IV.APEC.HHE. ML:1.0 0.00015204999999999998 0.1 AML other m 2023-04-04T04:50:18.92
IV.ATPI.EHE. ML:0.0 0.000081532075 1.68 AML other m 2023-04-04T04:50:14.94
IV.ATPI.EHN. ML:0.0 0.00005366258 0.08 AML other m 2023-04-04T04:50:17.16
IV.ATPI.HNE. ML:0.0 0.00015356434999999998 0.9984 AML other m 2023-04-04T04:50:15.78
IV.ATPI.HNN. ML:0.0 0.00009557835000000001 0.5696 AML other m 2023-04-04T04:50:20.29
IV.ATVO.HHE. ML:0.7 0.00007096248499999999 0.0992 AML other m 2023-04-04T04:50:18.39
IV.ATVO.HHN. ML:0.8 0.000082551065 0.2592 AML other m 2023-04-04T04:50:18.52
IV.ATVO.HNE. ML:0.9 0.000105341115 0.5088 AML other m 2023-04-04T04:50:17.55
IV.ATVO.HNN. ML:0.9 0.00010813226 0.2688 AML other m 2023-04-04T04:50:18.52
IV.APEC.HNE. ML:1.7 0.0006790840650000001 1.072 AML other m 2023-04-04T04:50:23.29
IV.APEC.HNN. ML:1.7 0.00070605985 1.2704 AML other m 2023-04-04T04:50:23.41
IV.ATFO.HHE. ML:0.8 0.000077469755 0.1216 AML other m 2023-04-04T04:50:19.43
IV.ATFO.HHN. ML:1.0 0.0001063541205 0.2816 AML other m 2023-04-04T04:50:19.07
IV.ATFO.HNE. ML:1.0 0.00011961318500000001 0.3104 AML other m 2023-04-04T04:50:19.07
IV.ATFO.HNN. ML:1.1 0.000128854795 0.2304 AML other m 2023-04-04T04:50:19.32
IV.NARO.HHE. ML:0.6 0.000034316040000000004 0.0608 AML other m 2023-04-04T04:50:21.02
IV.NARO.HHN. ML:0.9 0.00006862194499999998 1.5808 AML other m 2023-04-04T04:50:16.69
IV.FRON.EHE. ML:1.0 0.00006531558 1.6192 AML other m 2023-04-04T04:50:18.41
IV.FRON.EHN. ML:0.5 0.000026230132 0.48 AML other m 2023-04-04T04:50:26.71
IV.MURB.HNE. ML:1.2 0.00011416862 0.368 AML other m 2023-04-04T04:50:27.10
IV.MURB.HNN. ML:1.2 0.000113299 0.7296 AML other m 2023-04-04T04:50:30.03
IV.MURB.HHE. ML:1.1 0.00008825268999999999 1.2992 AML other m 2023-04-04T04:50:31.66
IV.MURB.HHN. ML:1.1 0.00007977111500000001 0.4 AML other m 2023-04-04T04:50:24.85
IV.SSFR.HHE. ML:0.6 0.000027268180000000003 0.1216 AML other m 2023-04-04T04:50:25.54
IV.SSFR.HHN. ML:0.7 0.000029622445 0.0608 AML other m 2023-04-04T04:50:23.38
IV.SSFR.HNE. ML:1.3 0.000113652015 0.2688 AML other m 2023-04-04T04:50:26.33
IV.SSFR.HNN. ML:1.3 0.000127819905 0.5888 AML other m 2023-04-04T04:50:30.33
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