Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 25-02-2021 and time 08:57:26 (Italy) in region 3 km N Sigillo (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km N Sigillo (PG), on

  • 25-02-2021 07:57:26 (UTC)
  • 25-02-2021 08:57:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3580, 12.7510 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
Sigillo PG 3 2404 2404
Costacciaro PG 3 1216 3620
Fossato di Vico PG 7 2840 6460
Scheggia e Pascelupo PG 8 1393 7853
Sassoferrato AN 12 7285 15138
Fabriano AN 13 31480 46618
Gubbio PG 14 32216 78834
Gualdo Tadino PG 14 15208 94042
Serra Sant'Abbondio PU 15 1027 95069
Cantiano PU 16 2245 97314
Genga AN 17 1797 99111
Frontone PU 18 1300 100411
Cerreto d'Esi AN 19 3817 104228
Esanatoglia MC 20 2034 106262

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km NE of Perugia (166134 inhabitants)
45 Km N of Foligno (57155 inhabitants)
58 Km SW of Fano (60888 inhabitants)
63 Km S of Pesaro (94582 inhabitants)
68 Km W of Ancona (100861 inhabitants)
71 Km E of Arezzo (99543 inhabitants)
80 Km S of Rimini (147750 inhabitants)
89 Km N of Terni (111501 inhabitants)
96 Km SE 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 1.0 2021-02-25
07:57:26		 43.3585 12.7513 12 2021-02-25
08:02:49		 Sala Sismica INGV-Roma 87474531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-25 07:57:26 ± 0.05
Latitude 43.3585 ± 0.0027
Longitude 12.7513 ± 0.0037
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 87474531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 320
Semi-minor axis of confidence ellipse (meter) 121
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 180
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 30
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27070
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 87474531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-25 08:02:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPAG.HNZ. 2021-02-25T07:57:37.05 0.3 undecidable manual S 1 30.0477 93 0.17 70
IV.ATPI.EHZ. 2021-02-25T07:57:37.08 0.3 undecidable manual S 290 29.9478 93 0.23 69
IV.ATVO.HNZ. 2021-02-25T07:57:36.25 0.3 undecidable manual S 276 27.9498 94 -0.06 72
IV.ATPC.HNZ. 2021-02-25T07:57:36.30 0.3 undecidable manual S 300 27.3504 94 0.15 71
IV.EL6.EHZ. 2021-02-25T07:57:36.69 0.3 undecidable manual S 96 28.4493 93 0.24 69
IV.PIEI.HHZ. 2021-02-25T07:57:35.64 0.3 undecidable manual S 319 26.2515 94 -0.23 70
IV.ATCC.EHZ. 2021-02-25T07:57:34.59 0.3 undecidable manual S 205 21.2676 96 0.06 73
IV.MURB.HNZ. 2021-02-25T07:57:34.74 0.3 undecidable manual S 240 21.1677 96 0.23 71
IV.ARVD.HHZ. 2021-02-25T07:57:34.69 0.3 undecidable manual S 45 21.7671 96 0.01 73
IV.ATBU.HNZ. 2021-02-25T07:57:34.78 0.3 undecidable manual S 309 20.868 97 0.33 69
IV.FDMO.HHZ. 2021-02-25T07:57:33.46 3.0 undecidable manual P -1.39 0
IV.FRON.EHZ. 2021-02-25T07:57:33.48 0.3 undecidable manual S 353 17.7711 100 -0.14 72
IV.EL6.EHZ. 2021-02-25T07:57:32.18 0.6 undecidable manual P 96 28.4493 93 -0.02 49
IV.ATPI.EHZ. 2021-02-25T07:57:32.29 0.3 undecidable manual P 290 29.9478 93 -0.14 71
IV.ATFO.HHZ. 2021-02-25T07:57:32.69 0.3 undecidable manual S 274 14.5743 109 -0.09 73
IV.MPAG.HNZ. 2021-02-25T07:57:32.75 0.6 undecidable manual P 1 30.0477 93 0.3 45
IV.FOSV.EHZ. 2021-02-25T07:57:31.10 0.3 undecidable manual S 174 7.0929 140 -0.04 74
IV.ATPC.HNZ. 2021-02-25T07:57:31.85 0.3 undecidable manual P 300 27.3504 94 -0.18 71
IV.SSFR.HHZ. 2021-02-25T07:57:31.67 0.3 undecidable manual S 16 8.9799 131 0.17 73
IV.ATCC.EHZ. 2021-02-25T07:57:31.00 0.6 positive manual P 205 21.2676 96 -0.09 48
IV.MURB.HNZ. 2021-02-25T07:57:31.45 0.3 undecidable manual P 240 21.1677 96 0.37 68
IV.ATVO.HNZ. 2021-02-25T07:57:31.90 0.3 undecidable manual P 276 27.9498 94 -0.22 70
IV.ARVD.HHZ. 2021-02-25T07:57:31.03 0.3 undecidable manual P 45 21.7671 96 -0.15 72
IV.ATSC.EHZ. 2021-02-25T07:57:31.44 0.3 undecidable manual S 324 8.9799 131 -0.05 74
IV.PIEI.HHZ. 2021-02-25T07:57:31.51 0.1 undecidable manual P 319 26.2515 94 -0.36 91
IV.FRON.EHZ. 2021-02-25T07:57:30.40 0.6 undecidable manual P 353 17.7711 100 -0.17 48
IV.ATBU.HNZ. 2021-02-25T07:57:30.97 0.3 undecidable manual P 309 20.868 97 -0.07 73
IV.ATSC.EHZ. 2021-02-25T07:57:29.32 0.3 undecidable manual P 324 8.9799 131 -0.02 75
IV.FOSV.EHZ. 2021-02-25T07:57:29.24 0.6 positive manual P 174 7.0929 140 0.1 50
IV.SSFR.HHZ. 2021-02-25T07:57:29.32 0.1 negative manual P 16 8.9799 131 -0.02 100
IV.ATFO.HHZ. 2021-02-25T07:57:29.99 0.3 undecidable manual P 274 14.5743 109 -0.09 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHN. ML:0.8 0.0000824 0.26 AML other m 2021-02-25T07:57:31.28
IV.FOSV.EHE. ML:0.7 0.000060200000000000006 0.18 AML other m 2021-02-25T07:57:31.13
IV.SSFR.HHE. ML:1.1 0.000144 0.18 AML other m 2021-02-25T07:57:31.78
IV.SSFR.HHN. ML:1.1 0.00016399999999999997 1.3 AML other m 2021-02-25T07:57:31.86
IV.ATFO.HHN. ML:0.9 0.00007544999999999999 0.08 AML other m 2021-02-25T07:57:33.04
IV.ATFO.HHE. ML:0.7 0.00005145 0.74 AML other m 2021-02-25T07:57:33.92
IV.FRON.EHE. ML:1.1 0.00010690000000000001 0.3 AML other m 2021-02-25T07:57:33.69
IV.FRON.EHN. ML:1.0 0.00008024999999999999 0.08 AML other m 2021-02-25T07:57:34.15
IV.ATCC.EHN. ML:1.2 0.0001116 0.12 AML other m 2021-02-25T07:57:34.74
IV.ATCC.EHE. ML:1.4 0.000154 0.1 AML other m 2021-02-25T07:57:34.86
IV.EL6.EHE. ML:1.2 0.00007089999999999999 0.14 AML other m 2021-02-25T07:57:36.89
IV.EL6.EHN. ML:1.0 0.00005605 0.58 AML other m 2021-02-25T07:57:37.67
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