Earthquake with magnitude of ML 0.5 on date 20-04-2021 and time 22:56:42 (Italy) in region 10 km SW Gubbio (PG)

A magnitude ML 0.5 earthquake occured in region: 10 km SW Gubbio (PG), on

  • 20-04-2021 20:56:42 (UTC)
  • 20-04-2021 22:56:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2780, 12.5160 at 10 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Gubbio PG 10 32216 32216
Valfabbrica PG 15 3389 35605
Umbertide PG 16 16681 52286
Montone PG 18 1680 53966
Costacciaro PG 18 1216 55182
Scheggia e Pascelupo PG 19 1393 56575
Sigillo PG 19 2404 58979
Pietralunga PG 19 2111 61090

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NE of Perugia (166134 inhabitants)
39 Km NW of Foligno (57155 inhabitants)
55 Km E of Arezzo (99543 inhabitants)
75 Km SW of Fano (60888 inhabitants)
77 Km SW of Pesaro (94582 inhabitants)
80 Km N of Terni (111501 inhabitants)
87 Km S of Rimini (147750 inhabitants)
89 Km W of Ancona (100861 inhabitants)
96 Km E of Siena (53903 inhabitants)
98 Km S of Cesena (96758 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 0.5 2021-04-20
20:56:42
43.2777 12.5157 10 2021-04-20
21:04:22
Sala Sismica INGV-Roma 89308581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-20 20:56:42 ± 0.1
Latitude 43.2777 ± 0.0054
Longitude 12.5157 ± 0.0086
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 89308581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 737
Semi-minor axis of confidence ellipse (meter) 539
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 66
Circular confidence region, given by single value of horizontal uncertainty (meter) 740.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.01619
Epicentral distance of station farthest from the epicenter (degree) 0.46855
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 89308581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-20 21:04:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGAB.HNE. 2021-04-20T20:56:59.81 0.3 undecidable manual S 219 52.0035 50 0.42 64
IV.MGAB.HNE. 2021-04-20T20:56:52.28 0.1 undecidable manual P 219 52.0035 50 -0.06 92
IV.ASSB.HHZ. 2021-04-20T20:56:52.67 0.3 undecidable manual S 156 28.5492 50 -0.44 67
IV.PIEI.HHZ. 2021-04-20T20:56:52.69 0.3 undecidable manual S 3 28.6491 50 -0.46 66
IV.ATPI.EHZ. 2021-04-20T20:56:50.22 0.3 undecidable manual S 335 21.2676 114 -0.6 64
IV.FOSV.EHZ. 2021-04-20T20:56:50.56 0.3 undecidable manual S 84 19.9689 116 0.17 72
IV.PIEI.HHZ. 2021-04-20T20:56:49.14 0.1 undecidable manual P 3 28.6491 50 0.4 90
IV.ASSB.HHZ. 2021-04-20T20:56:48.36 0.6 undecidable manual P 156 28.5492 50 -0.36 45
IV.ATCC.EHZ. 2021-04-20T20:56:48.71 0.3 undecidable manual S 136 14.3745 124 -0.01 75
IV.ATPI.EHZ. 2021-04-20T20:56:47.24 0.1 undecidable manual P 335 21.2676 114 -0.15 96
IV.ATMI.HHZ. 2021-04-20T20:56:47.82 0.1 undecidable manual P 287 20.9679 115 0.48 89
IV.ATFO.HHZ. 2021-04-20T20:56:47.94 0.3 undecidable manual S 25 10.878 132 0.19 73
IV.FOSV.EHZ. 2021-04-20T20:56:47.34 0.1 undecidable manual P 84 19.9689 116 0.19 95
IV.ATCC.EHZ. 2021-04-20T20:56:46.35 1.0 positive manual P 136 14.3745 124 0.17 24
IV.ATFO.HHZ. 2021-04-20T20:56:45.88 0.1 undecidable manual P 25 10.878 132 0.26 95
IV.MURB.HHZ. 2021-04-20T20:56:45.66 0.3 undecidable manual S 156 1.7982 170 -0.46 70
IV.MURB.HHZ. 2021-04-20T20:56:44.58 0.1 undecidable manual P 156 1.7982 170 -0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATFO.HHE. ML:0.6 0.00004845 0.34 AML other m 2021-04-20T20:56:48.34
IV.ATFO.HHN. ML:0.5 0.000038599999999999996 0.54 AML other m 2021-04-20T20:56:48.28
IV.ATCC.EHE. ML:0.7 0.0000505 0.3 AML other m 2021-04-20T20:56:50.27
IV.ATPI.EHN. ML:0.3 0.000017465000000000003 1.4 AML other m 2021-04-20T20:56:50.83
IV.ATCC.EHN. ML:0.6 0.000038900000000000004 0.24 AML other m 2021-04-20T20:56:50.88
IV.FOSV.EHN. ML:0.5 0.0000269 1.42 AML other m 2021-04-20T20:56:50.90
IV.ATPI.EHE. ML:0.2 0.000012250000000000001 0.82 AML other m 2021-04-20T20:56:50.96
IV.FOSV.EHE. ML:0.4 0.00002235 1.7 AML other m 2021-04-20T20:56:51.92
IV.PIEI.HHE. ML:0.6 0.00001855 1.04 AML other m 2021-04-20T20:56:53.54
IV.PIEI.HHN. ML:0.5 0.000017 0.18 AML other m 2021-04-20T20:56:54.04
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