Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 23-02-2021 and time 05:55:35 (Italy) in region 4 km NW Scheggia e Pascelupo (PG)

A magnitude ML 0.4 earthquake occured in region: 4 km NW Scheggia e Pascelupo (PG), on

  • 23-02-2021 04:55:35 (UTC)
  • 23-02-2021 05:55:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4230, 12.6260 at 12 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
Scheggia e Pascelupo PG 4 1393 1393
Cantiano PU 6 2245 3638
Gubbio PG 9 32216 35854
Costacciaro PG 10 1216 37070
Sigillo PG 14 2404 39474
Frontone PU 14 1300 40774
Cagli PU 14 8731 49505
Serra Sant'Abbondio PU 14 1027 50532
Pietralunga PG 15 2111 52643
Fossato di Vico PG 18 2840 55483
Sassoferrato AN 19 7285 62768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NE of Perugia (166134 inhabitants)
52 Km N of Foligno (57155 inhabitants)
57 Km SW of Fano (60888 inhabitants)
59 Km SW of Pesaro (94582 inhabitants)
60 Km E of Arezzo (99543 inhabitants)
71 Km S of Rimini (147750 inhabitants)
75 Km W of Ancona (100861 inhabitants)
85 Km SE of Cesena (96758 inhabitants)
96 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 0.4 2021-02-23
04:55:35		 43.4232 12.6255 12 2021-02-23
04:59:23		 Sala Sismica INGV-Roma 87399021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-23 04:55:35 ± 0.07
Latitude 43.4232 ± 0.0027
Longitude 12.6255 ± 0.0050
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87399021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 380
Semi-minor axis of confidence ellipse (meter) 71
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
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) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.04407
Epicentral distance of station farthest from the epicenter (degree) 0.19066
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:0.4

Field Value
Value 0.4
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 87399021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-23 04:59:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NARO.HHZ. 2021-02-23T04:55:43.17 0.3 undecidable manual S 350 21.1677 98 0 72
IV.MURB.HHZ. 2021-02-23T04:55:42.75 0.3 undecidable manual S 205 19.5693 99 0 73
IV.FOSV.EHZ. 2021-02-23T04:55:42.25 0.3 undecidable manual S 142 17.9709 102 -0.09 73
IV.FRON.EHZ. 2021-02-23T04:55:41.07 0.1 undecidable manual S 38 13.2756 115 -0.07 97
IV.PIEI.HNN. 2021-02-23T04:55:41.18 0.3 undecidable manual S 330 14.4744 110 -0.25 69
IV.ATBU.EHE. 2021-02-23T04:55:40.44 0.1 undecidable manual S 313 8.4804 134 0.34 93
IV.ATFO.HHZ. 2021-02-23T04:55:39.76 0.1 undecidable manual S 215 7.6812 138 -0.17 96
IV.NARO.HHZ. 2021-02-23T04:55:39.63 0.6 negative manual P 350 21.1677 98 -0.11 47
IV.MURB.HHZ. 2021-02-23T04:55:39.66 0.6 undecidable manual P 205 19.5693 99 0.16 47
IV.ATSC.EHN. 2021-02-23T04:55:39.51 0.1 undecidable manual S 89 4.8951 152 0 100
IV.FOSV.EHZ. 2021-02-23T04:55:39.25 1.0 undecidable manual P 142 17.9709 102 -0.01 24
IV.FRON.EHZ. 2021-02-23T04:55:38.62 0.6 positive manual P 38 13.2756 115 0.05 49
IV.ATBU.EHE. 2021-02-23T04:55:38.17 0.1 undecidable manual P 313 8.4804 134 0.2 96
IV.PIEI.HNN. 2021-02-23T04:55:38.57 0.1 undecidable manual P 330 14.4744 110 -0.17 94
IV.ATSC.EHN. 2021-02-23T04:55:37.67 0.1 undecidable manual P 89 4.8951 152 0.04 99
IV.ATFO.HHZ. 2021-02-23T04:55:37.86 0.1 undecidable manual P 215 7.6812 138 -0.01 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRON.EHE. ML:0.3 0.0000223 0.14 AML other m 2021-02-23T04:55:41.10
IV.FRON.EHN. ML:0.4 0.00002715 0.6 AML other m 2021-02-23T04:55:41.50
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