Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.3 on date 19-04-2021 and time 22:23:48 (Italy) in region 4 km E Pietralunga (PG)

A magnitude ML 0.3 earthquake occured in region: 4 km E Pietralunga (PG), on

  • 19-04-2021 20:23:48 (UTC)
  • 19-04-2021 22:23:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4370, 12.4900 at 9 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
Gubbio PG 12 32216 34327
Cantiano PU 12 2245 36572
Apecchio PU 15 1882 38454
Scheggia e Pascelupo PG 15 1393 39847
Montone PG 15 1680 41527
Piobbico PU 17 2029 43556
Cagli PU 18 8731 52287
Umbertide PG 20 16681 68968
Costacciaro PG 20 1216 70184

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km N of Perugia (166134 inhabitants)
49 Km E of Arezzo (99543 inhabitants)
56 Km NW of Foligno (57155 inhabitants)
62 Km SW of Fano (60888 inhabitants)
63 Km SW of Pesaro (94582 inhabitants)
70 Km S of Rimini (147750 inhabitants)
80 Km S of Cesena (96758 inhabitants)
85 Km W of Ancona (100861 inhabitants)
94 Km E of Siena (53903 inhabitants)
95 Km SE of Forlì (117913 inhabitants)
98 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
Reviewed
Rev100 		ML 0.3 2021-04-19
20:23:48		 43.437 12.4897 9 2021-04-19
20:41:37		 Sala Sismica INGV-Roma 89268361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-19 20:23:48 ± 0.11
Latitude 43.4370 ± 0.0027
Longitude 12.4897 ± 0.0037
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 89268361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 298
Semi-minor axis of confidence ellipse (meter) 80
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 133
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 46
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.04946
Epicentral distance of station farthest from the epicenter (degree) 0.19245
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:0.3

Field Value
Value 0.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 89268361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-19 20:41:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BADI.EHZ. 2021-04-19T20:23:57.06 0.6 undecidable manual S 292 21.3675 113 0.09 48
IV.MURB.HHZ. 2021-04-19T20:23:56.73 0.6 undecidable manual S 172 19.4694 115 0.33 46
IV.NARO.HHZ. 2021-04-19T20:23:56.51 0.3 undecidable manual S 21 20.6682 113 -0.24 70
IV.FRON.EHZ. 2021-04-19T20:23:56.88 0.6 undecidable manual S 65 21.0678 113 0.01 49
IV.ATSC.EHE. 2021-04-19T20:23:55.32 0.3 undecidable manual S 95 15.9729 119 0.03 74
IV.PIEI.HHE. 2021-04-19T20:23:54.31 0.6 undecidable manual S 18 11.5773 128 0.3 47
IV.ATLO.EHE. 2021-04-19T20:23:54.87 0.6 undecidable manual S 206 15.0738 121 -0.16 48
IV.TB02.DHZ. 2021-04-19T20:23:53.32 0.3 undecidable manual S 221 9.7791 132 -0.24 71
IV.BADI.EHZ. 2021-04-19T20:23:53.86 0.6 negative manual P 292 21.3675 113 0.28 46
IV.MURB.HHZ. 2021-04-19T20:23:53.18 1.0 positive manual P 172 19.4694 115 -0.07 24
IV.TB03.DHZ.01 2021-04-19T20:23:53.76 0.6 undecidable manual S 238 7.4814 140 0.76 41
IV.NARO.HHZ. 2021-04-19T20:23:53.34 0.1 positive manual P 21 20.6682 113 -0.11 96
IV.ATFO.HHZ. 2021-04-19T20:23:53.46 0.6 undecidable manual S 140 10.1787 131 -0.2 48
IV.FRON.EHZ. 2021-04-19T20:23:53.44 0.1 undecidable manual P 65 21.0678 113 -0.09 96
IV.ATSC.EHE. 2021-04-19T20:23:52.65 0.1 undecidable manual P 95 15.9729 119 0.04 98
IV.ATBU.EHZ. 2021-04-19T20:23:52.84 0.6 undecidable manual S 48 6.3936 144 0.08 49
IV.ATPC.HHZ. 2021-04-19T20:23:52.42 0.3 undecidable manual S 332 5.4945 148 -0.17 73
IV.ATLO.EHE. 2021-04-19T20:23:52.44 0.1 undecidable manual P 206 15.0738 121 -0.02 99
IV.ATPI.EHZ. 2021-04-19T20:23:52.71 0.6 undecidable manual S 282 7.1928 141 -0.22 48
IV.PIEI.HHE. 2021-04-19T20:23:52.00 0.1 undecidable manual P 18 11.5773 128 0.12 97
IV.ATFO.HHZ. 2021-04-19T20:23:51.68 0.6 positive manual P 140 10.1787 131 0.01 50
IV.TB01.DHN.01 2021-04-19T20:23:51.22 0.1 undecidable manual P 215 7.4814 140 -0.07 99
IV.TB02.DHZ. 2021-04-19T20:23:51.59 0.1 undecidable manual P 221 9.7791 132 -0.02 100
IV.ATBU.EHZ. 2021-04-19T20:23:51.34 0.1 undecidable manual P 48 6.3936 144 0.19 97
IV.ATPC.HHZ. 2021-04-19T20:23:51.09 0.1 undecidable manual P 332 5.4945 148 0.04 100
IV.ATPI.EHZ. 2021-04-19T20:23:51.22 1.0 undecidable manual P 282 7.1928 141 -0.03 25
IV.TB03.DHZ.01 2021-04-19T20:23:51.20 0.1 undecidable manual P 238 7.4814 140 -0.09 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.EHE. ML:0.4 0.00004045 1.56 AML other m 2021-04-19T20:23:52.08
IV.ATPI.EHN. ML:0.5 0.000052449999999999994 1.46 AML other m 2021-04-19T20:23:53.91
IV.ATFO.HHE. ML:0.2 0.00001942004 0.1408 AML other m 2021-04-19T20:23:53.94
IV.ATFO.HHN. ML:0.0 0.000015680050000000002 0.192 AML other m 2021-04-19T20:23:54.57
IV.MURB.HHE. ML:0.5 0.000027219215 0.2304 AML other m 2021-04-19T20:23:57.75
IV.MURB.HHN. ML:0.4 0.000019077035 0.1152 AML other m 2021-04-19T20:23:57.24
IV.NARO.HHE. ML:0.1 0.000011586470000000001 0.064 AML other m 2021-04-19T20:23:57.70
IV.NARO.HHN. ML:0.1 0.0000082302725 0.064 AML other m 2021-04-19T20:23:57.31
IV.BADI.EHE. ML:0.4 0.000021560985 0.1408 AML other m 2021-04-19T20:23:57.38
IV.BADI.EHN. ML:0.3 0.000016952599999999998 0.2176 AML other m 2021-04-19T20:23:57.41
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