Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 31-03-2023 and time 01:49:46 (UTC) in region 5 km N Pietralunga (PG)

A magnitude ML 1.5 earthquake occured in region: 5 km N Pietralunga (PG), on

  • 31-03-2023 01:49:46 (UTC)
  • 31-03-2023 03:49:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4870, 12.4390 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 5 2111 2111
Apecchio PU 8 1882 3993
Piobbico PU 13 2029 6022
Cantiano PU 15 2245 8267
Montone PG 16 1680 9947
Città di Castello PG 16 39913 49860
Cagli PU 18 8731 58591
Gubbio PG 19 32216 90807
Mercatello sul Metauro PU 20 1378 92185
Sant'Angelo in Vado PU 20 4133 96318

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km N of Perugia (166134 inhabitants)
45 Km E of Arezzo (99543 inhabitants)
61 Km SW of Pesaro (94582 inhabitants)
61 Km SW of Fano (60888 inhabitants)
63 Km NW of Foligno (57155 inhabitants)
65 Km S of Rimini (147750 inhabitants)
74 Km S of Cesena (96758 inhabitants)
88 Km SE of Forlì (117913 inhabitants)
88 Km W of Ancona (100861 inhabitants)
91 Km E of Siena (53903 inhabitants)
99 Km SE of Faenza (58541 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 1.5 2023-03-31
01:49:46		 43.4873 12.4387 8 2024-03-01
17:18:09		 Bollettino Sismico Italiano INGV 117627551
Reviewed
Rev100 		ML 1.5 2023-03-31
01:49:46		 43.4872 12.4387 8 2023-03-31
02:03:01		 Sala Sismica INGV-Roma 115900871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-31 01:49:46 ± 0.03
Latitude 43.4873 ± 0.0018
Longitude 12.4387 ± 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 117627551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 173
Semi-minor axis of confidence ellipse (meter) 74
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 178
Circular confidence region, given by single value of horizontal uncertainty (meter) 170.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 31
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) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.01529
Epicentral distance of station farthest from the epicenter (degree) 0.43257
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 117627551
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-23 11:48:53

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 115900871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-31 02:03:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SNTG.HHZ. 2023-03-31T01:50:02.56 0.6 undecidable manual S 122 48.0186 50 0.18 45
IV.CAFI.HHZ. 2023-03-31T01:50:00.97 0.6 undecidable manual S 245 41.9247 50 0.21 45
IV.ARVD.HHZ. 2023-03-31T01:50:00.36 0.3 undecidable manual S 88 40.5261 50 -0.02 71
IV.ATCC.EHZ. 2023-03-31T01:49:59.81 0.3 undecidable manual S 154 37.2294 50 0.29 68
IV.FOSV.EHZ. 2023-03-31T01:49:58.45 0.6 undecidable manual S 129 33.6441 103 0.01 48
IV.MPAG.EHZ. 2023-03-31T01:49:57.41 0.6 undecidable manual S 58 30.2475 105 0.12 47
IV.MURB.HHZ. 2023-03-31T01:49:56.09 0.6 undecidable manual S 164 25.8519 107 0.27 46
IV.SSFR.HHZ. 2023-03-31T01:49:56.44 0.6 undecidable manual S 101 28.2495 106 -0.18 47
IV.SSP9.EHZ. 2023-03-31T01:49:55.81 0.6 undecidable manual S 291 26.5512 107 -0.23 46
IV.ATVA.EHZ. 2023-03-31T01:49:55.94 0.6 undecidable manual S 208 26.2515 107 -0.01 49
IV.PE3.EHZ. 2023-03-31T01:49:55.05 0.6 undecidable manual S 11 23.6541 109 -0.04 49
IV.PARC.HHZ. 2023-03-31T01:49:55.36 0.3 undecidable manual S 318 24.0537 108 0.13 72
IV.SNTG.HHZ. 2023-03-31T01:49:55.55 0.3 undecidable manual P 122 48.0186 50 -0.09 69
IV.FRON.EHZ. 2023-03-31T01:49:54.98 0.3 undecidable manual S 82 23.3544 109 -0.02 73
IV.ATSC.EHZ. 2023-03-31T01:49:54.36 0.6 undecidable manual S 109 21.1677 111 0.08 48
IV.ATMI.HHZ. 2023-03-31T01:49:54.59 0.3 undecidable manual S 219 21.867 110 0.08 73
IV.CAFI.HHZ. 2023-03-31T01:49:54.28 0.3 undecidable manual P 245 41.9247 50 -0.43 65
IV.ARVD.HHZ. 2023-03-31T01:49:54.18 0.1 undecidable manual P 88 40.5261 50 -0.31 89
IV.FOSV.EHZ. 2023-03-31T01:49:53.01 0.3 undecidable manual P 129 33.6441 103 -0.35 67
IV.ATMC.EHE. 2023-03-31T01:49:53.94 0.3 undecidable manual S 257 20.2686 112 -0.06 73
IV.ATCC.EHZ. 2023-03-31T01:49:53.86 0.1 undecidable manual P 154 37.2294 50 -0.13 93
IV.NARO.HHZ. 2023-03-31T01:49:53.26 0.6 undecidable manual S 40 17.871 114 0.04 49
IV.ATLO.EHZ. 2023-03-31T01:49:53.68 0.3 undecidable manual S 188 19.2696 113 0.01 74
IV.CDCA.HNN. 2023-03-31T01:49:53.26 0.6 undecidable manual S 259 16.7721 115 0.36 46
IV.SSFR.HHZ. 2023-03-31T01:49:52.04 0.3 undecidable manual P 101 28.2495 106 -0.28 69
IV.ATFO.HHZ. 2023-03-31T01:49:52.88 0.3 undecidable manual S 141 17.1717 115 -0.12 73
IV.MURB.HHZ. 2023-03-31T01:49:52.04 0.3 undecidable manual P 164 25.8519 107 0.19 70
IV.ATVA.EHZ. 2023-03-31T01:49:52.16 0.3 undecidable manual P 208 26.2515 107 0.23 70
IV.BADI.EHZ. 2023-03-31T01:49:52.55 0.3 undecidable manual S 279 15.873 117 -0.04 74
IV.MPAG.EHZ. 2023-03-31T01:49:52.80 0.3 undecidable manual P 58 30.2475 105 0.1 71
IV.PARC.HHZ. 2023-03-31T01:49:51.41 0.1 undecidable manual P 318 24.0537 108 -0.1 96
IV.PIEI.HHZ. 2023-03-31T01:49:51.11 0.3 undecidable manual S 55 9.4794 130 0.38 70
IV.ATVO.HHZ. 2023-03-31T01:49:51.58 0.3 undecidable manual S 192 11.9769 124 0.16 73
IV.FRON.EHZ. 2023-03-31T01:49:51.24 0.1 undecidable manual P 82 23.3544 109 -0.14 95
IV.ATMI.HHZ. 2023-03-31T01:49:51.05 0.1 undecidable manual P 219 21.867 110 -0.05 97
IV.SSP9.EHZ. 2023-03-31T01:49:51.96 0.1 undecidable manual P 291 26.5512 107 -0.02 97
IV.PE3.EHZ. 2023-03-31T01:49:51.67 0.3 undecidable manual P 11 23.6541 109 0.24 70
IV.NARO.HHZ. 2023-03-31T01:49:50.27 0.1 undecidable manual P 40 17.871 114 -0.08 97
IV.ATLO.EHZ. 2023-03-31T01:49:50.59 0.1 positive manual P 188 19.2696 113 -0.02 98
IV.BADI.EHZ. 2023-03-31T01:49:50.07 0.1 negative manual P 279 15.873 117 0.08 98
IV.APEC.HHZ. 2023-03-31T01:49:50.34 0.3 undecidable manual S 349 8.0808 135 -0.03 75
IV.CDCA.HNN. 2023-03-31T01:49:50.36 0.3 undecidable manual P 259 16.7721 115 0.19 71
IV.ATFO.HHZ. 2023-03-31T01:49:50.20 0.1 undecidable manual P 141 17.1717 115 -0.03 99
IV.ATMC.EHE. 2023-03-31T01:49:50.80 0.1 undecidable manual P 257 20.2686 112 -0.01 98
IV.ATBU.EHZ. 2023-03-31T01:49:50.88 0.3 undecidable manual S 98 8.88 132 0.28 71
IV.ATSC.EHZ. 2023-03-31T01:49:50.94 0.1 undecidable manual P 109 21.1677 111 -0.03 98
IV.ATPI.EHZ. 2023-03-31T01:49:49.41 0.3 undecidable manual S 216 4.995 148 -0.3 71
IV.ATBU.EHZ. 2023-03-31T01:49:49.11 0.1 positive manual P 98 8.88 132 0.27 95
IV.ATVO.HHZ. 2023-03-31T01:49:49.42 0.1 positive manual P 192 11.9769 124 0.1 98
IV.PIEI.HHZ. 2023-03-31T01:49:49.10 0.1 positive manual P 55 9.4794 130 0.19 97
IV.ATPI.EHZ. 2023-03-31T01:49:48.27 0.1 positive manual P 216 4.995 148 -0.06 100
IV.APEC.HHZ. 2023-03-31T01:49:48.78 0.1 negative manual P 349 8.0808 135 0.07 99
IV.ATPC.HNZ. 2023-03-31T01:49:48.70 0.3 undecidable manual S 116 1.6983 168 -0.57 67
IV.ATPC.HNZ. 2023-03-31T01:49:47.90 0.1 undecidable manual P 116 1.6983 168 -0.17 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APEC.HHN. ML:1.7 0.000927 0.24 AML other m 2023-03-31T01:49:50.56
IV.APEC.HHE. ML:1.5 0.0005015 0.32 AML other m 2023-03-31T01:49:50.61
IV.PIEI.HNN. ML:1.5 0.0004335 0.32 AML other m 2023-03-31T01:49:51.20
IV.PIEI.HHN. ML:1.5 0.0005204999999999999 0.4 AML other m 2023-03-31T01:49:51.49
IV.PIEI.HNE. ML:1.8 0.000897 0.18 AML other m 2023-03-31T01:49:51.43
IV.PIEI.HHE. ML:1.8 0.000884 0.18 AML other m 2023-03-31T01:49:51.43
IV.ATVO.HHE. ML:1.5 0.000377 0.28 AML other m 2023-03-31T01:49:51.83
IV.ATVO.HHN. ML:1.2 0.0002175 0.3 AML other m 2023-03-31T01:49:51.97
IV.BADI.EHE. ML:1.3 0.0001875 1.16 AML other m 2023-03-31T01:49:53.14
IV.ATFO.HNN. ML:1.5 0.00027150000000000004 1 AML other m 2023-03-31T01:49:53.29
IV.ATFO.HHN. ML:1.3 0.000177 0.98 AML other m 2023-03-31T01:49:53.29
IV.BADI.EHN. ML:1.4 0.000263 0.24 AML other m 2023-03-31T01:49:53.54
IV.ATFO.HHE. ML:1.4 0.0002055 0.18 AML other m 2023-03-31T01:49:53.60
IV.ATFO.HNE. ML:1.4 0.0002117 0.64 AML other m 2023-03-31T01:49:54.19
IV.NARO.HHN. ML:1.1 0.00011999999999999999 0.06 AML other m 2023-03-31T01:49:54.49
IV.NARO.HHE. ML:1.2 0.0001375 0.3 AML other m 2023-03-31T01:49:54.59
IV.FRON.EHE. ML:1.2 0.00009745000000000001 1.08 AML other m 2023-03-31T01:49:55.05
IV.FRON.EHN. ML:1.3 0.0001285 0.3 AML other m 2023-03-31T01:49:55.81
IV.PARC.HHE. ML:1.3 0.0001145 0.9 AML other m 2023-03-31T01:49:55.44
IV.PARC.HHN. ML:1.4 0.000156 0.28 AML other m 2023-03-31T01:49:56.48
IV.MURB.HHN. ML:1.9 0.0004955000000000001 1.8 AML other m 2023-03-31T01:49:57.99
IV.MURB.HHE. ML:1.7 0.000324 0.18 AML other m 2023-03-31T01:49:57.05
IV.SSFR.HNN. ML:1.7 0.000289 1.2 AML other m 2023-03-31T01:49:57.17
IV.SSFR.HHN. ML:1.4 0.00014600000000000003 0.22 AML other m 2023-03-31T01:49:57.39
IV.SSFR.HHE. ML:1.6 0.00020750000000000003 0.16 AML other m 2023-03-31T01:49:57.30
IV.SSFR.HNE. ML:1.7 0.0002825 0.18 AML other m 2023-03-31T01:49:57.38
IV.ATCC.EHN. ML:1.7 0.00017549999999999998 1.06 AML other m 2023-03-31T01:50:00.07
IV.ATCC.EHE. ML:1.6 0.0001555 1.04 AML other m 2023-03-31T01:50:00.63
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