Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 27-09-2021 and time 04:15:18 (Italy) in region 3 km NE Sigillo (PG)

A magnitude ML 1.3 earthquake occured in region: 3 km NE Sigillo (PG), on

  • 27-09-2021 02:15:18 (UTC)
  • 27-09-2021 04:15:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3590, 12.7630 at 16 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 4 1216 3620
Fossato di Vico PG 7 2840 6460
Scheggia e Pascelupo PG 9 1393 7853
Sassoferrato AN 12 7285 15138
Fabriano AN 12 31480 46618
Gualdo Tadino PG 14 15208 61826
Serra Sant'Abbondio PU 15 1027 62853
Gubbio PG 15 32216 95069
Genga AN 16 1797 96866
Cantiano PU 17 2245 99111
Frontone PU 18 1300 100411
Cerreto d'Esi AN 19 3817 104228
Esanatoglia MC 19 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)
72 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 1.3 2021-09-27
02:15:18		 43.3587 12.7627 16 2021-09-27
02:23:49		 Sala Sismica INGV-Roma 95924911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 02:15:18 ± 0.09
Latitude 43.3587 ± 0.0027
Longitude 12.7627 ± 0.0049
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95924911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 419
Semi-minor axis of confidence ellipse (meter) 204
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 29
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) 0.41818
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:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 95924911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 02:23:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2021-09-27T02:15:33.91 0.6 undecidable manual S 144 44.3223 98 0.55 42
IV.CESI.HHZ. 2021-09-27T02:15:32.43 0.6 undecidable manual S 164 40.9257 99 -0.02 47
IV.ASSB.HHZ. 2021-09-27T02:15:31.08 0.6 undecidable manual S 194 36.0417 101 -0.1 47
IV.NARO.HHZ. 2021-09-27T02:15:30.06 0.6 undecidable manual S 332 31.5462 103 0.05 48
IV.MML1.EHZ. 2021-09-27T02:15:30.47 0.6 undecidable manual S 148 32.0457 103 0.35 45
IV.PE3.EHZ. 2021-09-27T02:15:29.49 3.0 positive manual P 2.32 0
IV.ATCC.EHZ. 2021-09-27T02:15:27.63 0.6 undecidable manual S 207 21.6672 113 0.15 48
IV.FDMO.HHZ. 2021-09-27T02:15:27.21 0.1 undecidable manual P 144 44.3223 98 -0.08 94
IV.ARVD.HHZ. 2021-09-27T02:15:27.62 0.6 undecidable manual S 43 21.1677 113 0.26 47
IV.ATBU.EHE. 2021-09-27T02:15:27.77 0.6 undecidable manual S 307 21.6672 113 0.3 46
IV.CSP1.EHZ. 2021-09-27T02:15:27.05 0.6 undecidable manual P 129 46.4202 97 -0.56 42
IV.MURB.HHZ. 2021-09-27T02:15:27.89 0.6 undecidable manual S 241 21.9669 112 0.34 46
IV.SNTG.HHZ. 2021-09-27T02:15:26.55 0.6 undecidable manual S 129 18.3705 118 -0.14 48
IV.CESI.HHZ. 2021-09-27T02:15:26.84 0.6 undecidable manual P 164 40.9257 99 0.08 47
IV.FRON.EHZ. 2021-09-27T02:15:26.47 0.6 undecidable manual S 350 17.871 119 -0.11 49
IV.ASSB.HHZ. 2021-09-27T02:15:25.79 0.1 undecidable manual P 194 36.0417 101 -0.24 92
IV.NARO.HHZ. 2021-09-27T02:15:25.27 1.0 undecidable manual P 332 31.5462 103 -0.09 24
IV.ATFO.HHZ. 2021-09-27T02:15:25.83 0.6 undecidable manual S 273 15.4734 124 -0.19 48
IV.MML1.EHZ. 2021-09-27T02:15:25.29 0.1 undecidable manual P 148 32.0457 103 -0.13 95
IV.ATBU.EHE. 2021-09-27T02:15:24.14 0.3 undecidable manual P 307 21.6672 113 0.25 70
IV.MURB.HHZ. 2021-09-27T02:15:24.07 0.3 negative manual P 241 21.9669 112 0.14 72
IV.SSFR.HHZ. 2021-09-27T02:15:24.58 0.6 undecidable manual S 10 8.7801 144 -0.16 49
IV.ATSC.EHZ. 2021-09-27T02:15:24.64 0.6 undecidable manual S 320 9.4794 142 -0.22 48
IV.ARVD.HHZ. 2021-09-27T02:15:23.95 0.1 negative manual P 43 21.1677 113 0.13 96
IV.FRON.EHZ. 2021-09-27T02:15:23.32 0.1 negative manual P 350 17.871 119 -0.05 99
IV.SNTG.HHZ. 2021-09-27T02:15:23.41 0.1 undecidable manual P 129 18.3705 118 -0.03 99
IV.ATCC.EHZ. 2021-09-27T02:15:23.92 0.1 positive manual P 207 21.6672 113 0.03 98
IV.ATFO.HHZ. 2021-09-27T02:15:22.88 0.6 undecidable manual P 273 15.4734 124 -0.17 48
IV.ATSC.EHZ. 2021-09-27T02:15:22.34 0.1 undecidable manual P 320 9.4794 142 -0.04 100
IV.SSFR.HHZ. 2021-09-27T02:15:22.27 0.6 undecidable manual P 10 8.7801 144 -0.04 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSFR.HHN. ML:1.0 0.00010750000000000001 0.72 AML other m 2021-09-27T02:15:24.87
IV.SSFR.HHE. ML:1.2 0.00014450000000000002 0.14 AML other m 2021-09-27T02:15:25.22
IV.SSFR.HNE. ML:1.6 0.000373 0.06 AML other m 2021-09-27T02:15:25.29
IV.SSFR.HNN. ML:1.5 0.000325 0.3 AML other m 2021-09-27T02:15:25.56
IV.FRON.EHE. ML:1.2 0.00012124999999999999 0.14 AML other m 2021-09-27T02:15:26.60
IV.FRON.EHN. ML:1.3 0.0001289 0.98 AML other m 2021-09-27T02:15:26.96
IV.ATCC.EHE. ML:1.2 0.00008885000000000002 1.44 AML other m 2021-09-27T02:15:27.19
IV.ATCC.EHN. ML:1.1 0.00006994999999999999 1.48 AML other m 2021-09-27T02:15:27.19
IV.MURB.HHN. ML:1.4 0.0001445 0.3 AML other m 2021-09-27T02:15:28.10
IV.MURB.HHE. ML:1.4 0.000161 0.24 AML other m 2021-09-27T02:15:28.24
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