Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.2 on date 21-04-2021 and time 21:50:15 (Italy) in region 6 km E Pietralunga (PG)

A magnitude ML 0.2 earthquake occured in region: 6 km E Pietralunga (PG), on

  • 21-04-2021 19:50:15 (UTC)
  • 21-04-2021 21:50:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4190, 12.5020 at 7 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 6 2111 2111
Gubbio PG 10 32216 34327
Cantiano PU 12 2245 36572
Scheggia e Pascelupo PG 14 1393 37965
Montone PG 15 1680 39645
Apecchio PU 17 1882 41527
Costacciaro PG 18 1216 42743
Cagli PU 19 8731 51474
Umbertide PG 19 16681 68155
Piobbico PU 19 2029 70184

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km N of Perugia (166134 inhabitants)
50 Km E of Arezzo (99543 inhabitants)
54 Km NW of Foligno (57155 inhabitants)
63 Km SW of Fano (60888 inhabitants)
64 Km SW of Pesaro (94582 inhabitants)
72 Km S of Rimini (147750 inhabitants)
83 Km S of Cesena (96758 inhabitants)
85 Km W of Ancona (100861 inhabitants)
95 Km E of Siena (53903 inhabitants)
96 Km N of Terni (111501 inhabitants)
97 Km SE of Forlì (117913 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 0.2 2021-04-21
19:50:15		 43.4187 12.5022 7 2021-07-12
16:55:12		 Bollettino Sismico Italiano INGV 90456521
Reviewed
Rev100 		ML 0.3 2021-04-21
19:50:16		 43.4237 12.511 5 2021-04-21
19:55:28		 Sala Sismica INGV-Roma 89337321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-21 19:50:15 ± 0.14
Latitude 43.4187 ± 0.0027
Longitude 12.5022 ± 0.0037
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90456521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 350
Semi-minor axis of confidence ellipse (meter) 86
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 147
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.06115
Epicentral distance of station farthest from the epicenter (degree) 0.20774
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:0.2

Field Value
Value 0.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 90456521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-24 15:43:20

ML:0.3

Field Value
Value 0.3
Uncertainty 0.1
Num. used stations 3
Type of magnitude ML
Reference to an origin 89337321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-21 19:55:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BADI.EHE. 2021-04-21T19:50:24.47 0.6 undecidable manual S 296 23.0547 107 0.22 47
IV.NARO.HHZ. 2021-04-21T19:50:23.66 0.3 undecidable manual S 16 22.2555 107 -0.32 69
IV.SSFR.HHN. 2021-04-21T19:50:23.90 0.6 undecidable manual S 85 22.6551 107 -0.22 47
IV.MURB.HHZ. 2021-04-21T19:50:22.78 0.3 undecidable manual S 174 17.3715 112 0.41 68
IV.ATSC.EHE. 2021-04-21T19:50:21.74 0.3 undecidable manual S 88 14.874 115 0.16 72
IV.ATLO.EHE. 2021-04-21T19:50:21.10 0.6 undecidable manual S 214 13.7751 116 -0.14 48
IV.PIEI.HHZ. 2021-04-21T19:50:21.29 0.3 undecidable manual S 12 13.2756 117 0.21 71
IV.MURB.HHZ. 2021-04-21T19:50:20.52 0.1 undecidable manual P 174 17.3715 112 0.88 76
IV.NARO.HHZ. 2021-04-21T19:50:20.29 0.6 negative manual P 16 22.2555 107 -0.27 46
IV.BADI.EHE. 2021-04-21T19:50:20.65 0.1 undecidable manual P 296 23.0547 107 -0.07 96
IV.SSFR.HHN. 2021-04-21T19:50:20.28 0.1 undecidable manual P 85 22.6551 107 -0.36 90
IV.PIEI.HHZ. 2021-04-21T19:50:19.07 0.6 positive manual P 12 13.2756 117 0.18 48
IV.ATFO.HHZ. 2021-04-21T19:50:19.28 0.1 undecidable manual S 136 8.0808 131 -0.29 94
IV.ATPI.EHZ. 2021-04-21T19:50:19.77 0.3 undecidable manual S 294 8.7801 128 0 75
IV.TB02.DHZ.01 2021-04-21T19:50:19.76 0.6 undecidable manual S 234 9.1797 127 -0.12 49
IV.ATSC.EHE. 2021-04-21T19:50:19.16 0.1 undecidable manual P 88 14.874 115 -0.02 98
IV.ATPC.HHE. 2021-04-21T19:50:19.73 0.6 undecidable manual S 332 7.7811 131 0.23 48
IV.TB03.DHZ. 2021-04-21T19:50:19.37 0.6 undecidable manual S 256 7.5813 132 -0.09 49
IV.ATBU.EHZ. 2021-04-21T19:50:19.90 0.6 undecidable manual S 30 7.3815 133 0.51 45
IV.TB01.DHZ. 2021-04-21T19:50:19.09 0.3 undecidable manual S 233 6.7932 136 -0.15 73
IV.ATBU.EHZ. 2021-04-21T19:50:18.13 0.1 undecidable manual P 30 7.3815 133 0.22 96
IV.ATPI.EHZ. 2021-04-21T19:50:18.10 0.1 undecidable manual P 294 8.7801 128 -0.03 99
IV.ATLO.EHE. 2021-04-21T19:50:18.89 0.1 undecidable manual P 214 13.7751 116 -0.09 97
IV.TB02.DHZ.01 2021-04-21T19:50:18.11 0.1 undecidable manual P 234 9.1797 127 -0.09 98
IV.ATPC.HHE. 2021-04-21T19:50:17.98 0.1 undecidable manual P 332 7.7811 131 0 100
IV.TB03.DHZ. 2021-04-21T19:50:17.86 0.1 undecidable manual P 256 7.5813 132 -0.1 98
IV.TB01.DHZ. 2021-04-21T19:50:17.74 0.1 undecidable manual P 233 6.7932 136 -0.09 99
IV.ATFO.HHZ. 2021-04-21T19:50:17.88 0.1 positive manual P 136 8.0808 131 -0.13 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATFO.HHE. ML:0.4 0.000038651985 0.1152 AML other m 2021-04-21T19:50:19.71
IV.ATPI.EHN. ML:0.2 0.000030233785 0.256 AML other m 2021-04-21T19:50:19.83
IV.ATPI.EHE. ML:0.4 0.000041447775 0.6432 AML other m 2021-04-21T19:50:20.41
IV.MURB.HHN. ML:0.2 0.0000146029595 0.256 AML other m 2021-04-21T19:50:23.24
IV.ATFO.HHN. ML:0.2 0.000027410035 0.1152 AML other m 2021-04-21T19:50:19.65
IV.PIEI.HHE. ML:0.1 0.000014086695 0.1024 AML other m 2021-04-21T19:50:21.84
IV.PIEI.HHN. ML:-0.4 0.0000072992835 0.0768 AML other m 2021-04-21T19:50:21.72
IV.NARO.HHE. ML:0.2 0.000008563066500000001 0.064 AML other m 2021-04-21T19:50:23.80
IV.NARO.HHN. ML:-0.2 0.0000045267540000000004 0.3968 AML other m 2021-04-21T19:50:24.37
IV.MURB.HHE. ML:0.2 0.000016259305000000002 0.1792 AML other m 2021-04-21T19:50:23.51
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