Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 08-10-2021 and time 00:29:29 (UTC) in region 1 km S Preci (PG)

A magnitude ML 1.6 earthquake occured in region: 1 km S Preci (PG), on

  • 08-10-2021 00:29:29 (UTC)
  • 08-10-2021 02:29:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8690, 13.0360 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Preci PG 1 724 724
Visso MC 8 1107 1831
Sellano PG 9 1079 2910
Norcia PG 10 4957 7867
Castelsantangelo sul Nera MC 10 281 8148
Cerreto di Spoleto PG 11 1075 9223
Ussita MC 12 444 9667
Monte Cavallo MC 14 145 9812
Cascia PG 17 3217 13029
Vallo di Nera PG 18 364 13393
Poggiodomo PG 19 117 13510
Fiordimonte MC 19 202 13712
Pieve Torina MC 20 1458 15170

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
59 Km E of Perugia (166134 inhabitants)
59 Km W of Teramo (54892 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
99 Km W of Montesilvano (53738 inhabitants)
100 Km N of Guidonia Montecelio (88673 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
Bulletin
Rev1000 		ML 1.6 2021-10-08
00:29:29		 42.8693 13.036 9 2022-03-30
13:04:27		 Bollettino Sismico Italiano INGV 99440441
Reviewed
Rev100 		ML 1.6 2021-10-08
00:29:29		 42.8738 13.03 10 2021-10-08
00:33:41		 Sala Sismica INGV-Roma 96334961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-08 00:29:29 ± 0.05
Latitude 42.8693 ± 0.0027
Longitude 13.0360 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99440441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 306
Semi-minor axis of confidence ellipse (meter) 179
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 49
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.06745
Epicentral distance of station farthest from the epicenter (degree) 0.48384
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 99440441
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-07 15:45:38

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 96334961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-08 00:33:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-10-08T00:29:46.40 0.6 undecidable manual S 6 51.3153 50 0.07 47
IV.TERO.HHZ. 2021-10-08T00:29:46.71 0.6 undecidable manual S 120 53.7018 50 -0.26 45
IV.MOMA.HNZ. 2021-10-08T00:29:43.31 0.6 undecidable manual S 259 38.628 50 0.38 45
IV.MF5.EHZ. 2021-10-08T00:29:43.09 0.6 undecidable manual S 69 36.8298 50 0.63 42
IV.GUMA.HHZ. 2021-10-08T00:29:41.42 0.6 undecidable manual S 48 32.4453 50 0.14 48
IV.ASSB.HHZ. 2021-10-08T00:29:41.71 0.6 undecidable manual S 302 36.1416 50 -0.57 43
IV.T1299.HNN. 2021-10-08T00:29:41.53 0.6 undecidable manual S 142 32.9448 50 0.12 48
IV.LNSS.HHZ. 2021-10-08T00:29:40.16 0.6 undecidable manual S 179 29.5482 107 -0.28 47
IV.EL6.EHZ. 2021-10-08T00:29:39.77 0.6 undecidable manual P 6 51.3153 50 0.46 43
IV.CSP1.EHZ. 2021-10-08T00:29:39.52 0.6 undecidable manual S 29 28.2495 108 -0.48 45
IV.TERO.HHZ. 2021-10-08T00:29:39.32 0.3 undecidable manual P 120 53.7018 50 -0.36 66
IV.MML1.EHZ. 2021-10-08T00:29:39.94 0.6 undecidable manual S 349 27.5502 108 0.15 48
IV.MMO1.EHZ. 2021-10-08T00:29:38.24 0.6 undecidable manual S 82 23.8539 111 -0.33 47
IV.GAVE.EHZ. 2021-10-08T00:29:38.25 0.6 undecidable manual S 210 22.755 112 0.03 50
IV.MF5.EHZ. 2021-10-08T00:29:37.21 0.1 undecidable manual P 69 36.8298 50 0.13 95
IV.MOMA.HNZ. 2021-10-08T00:29:37.49 0.3 undecidable manual P 259 38.628 50 0.15 71
IV.CESI.HHZ. 2021-10-08T00:29:36.73 0.6 undecidable manual S 325 18.4704 116 -0.11 50
IV.GUMA.HHZ. 2021-10-08T00:29:36.30 0.1 undecidable manual P 48 32.4453 50 -0.09 97
IV.FDMO.HHZ. 2021-10-08T00:29:36.85 0.6 undecidable manual S 13 18.9699 115 -0.17 49
IV.ASSB.HHZ. 2021-10-08T00:29:36.57 0.3 undecidable manual P 302 36.1416 50 -0.4 68
IV.T1299.HNN. 2021-10-08T00:29:36.45 0.3 undecidable manual P 142 32.9448 50 -0.02 74
IT.MTCL.HGZ. 2021-10-08T00:29:35.30 0.6 undecidable manual S 348 14.1747 123 -0.23 49
IV.MML1.EHZ. 2021-10-08T00:29:35.77 0.3 undecidable manual P 349 27.5502 108 0.24 71
IV.MC2.EHZ. 2021-10-08T00:29:35.56 0.6 undecidable manual S 69 13.2756 124 0.28 48
IV.LNSS.HHZ. 2021-10-08T00:29:35.71 0.3 undecidable manual P 179 29.5482 107 -0.19 72
IV.CSP1.EHZ. 2021-10-08T00:29:35.34 0.1 undecidable manual P 29 28.2495 108 -0.31 93
IV.MMO1.EHZ. 2021-10-08T00:29:34.65 0.1 undecidable manual P 82 23.8539 111 -0.18 97
IV.GAVE.EHZ. 2021-10-08T00:29:34.74 0.1 undecidable manual P 210 22.755 112 0.12 98
IV.FEMA.HNE. 2021-10-08T00:29:34.51 0.6 undecidable manual S 6 10.3785 131 0.03 51
IV.NRCA.HNZ. 2021-10-08T00:29:33.82 0.6 undecidable manual S 122 7.4814 140 0.04 51
IV.FDMO.HHZ. 2021-10-08T00:29:33.87 0.1 undecidable manual P 13 18.9699 115 -0.06 100
IT.MTCL.HGZ. 2021-10-08T00:29:33.19 0.3 undecidable manual P 348 14.1747 123 0.12 75
IV.MC2.EHZ. 2021-10-08T00:29:33.14 0.1 undecidable manual P 69 13.2756 124 0.21 98
IV.CESI.HHZ. 2021-10-08T00:29:33.90 0.1 undecidable manual P 325 18.4704 116 0.07 100
IV.FEMA.HNE. 2021-10-08T00:29:32.79 0.3 undecidable manual P 6 10.3785 131 0.32 72
IV.NRCA.HNZ. 2021-10-08T00:29:32.29 0.1 negative manual P 122 7.4814 140 0.23 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:1.8 0.001105 0.08 AML other m 2021-10-08T00:29:33.88
IV.NRCA.HHN. ML:1.9 0.0011595 0.08 AML other m 2021-10-08T00:29:33.88
IV.NRCA.HHE. ML:1.7 0.0008945000000000001 0.84 AML other m 2021-10-08T00:29:33.99
IV.NRCA.HNE. ML:1.7 0.000794 0.98 AML other m 2021-10-08T00:29:34.08
IV.FDMO.HHE. ML:1.3 0.000175 0.18 AML other m 2021-10-08T00:29:37.33
IV.FDMO.HHN. ML:1.2 0.0001215 0.48 AML other m 2021-10-08T00:29:37.49
IV.GAVE.EHN. ML:1.5 0.0001975 1.06 AML other m 2021-10-08T00:29:38.53
IV.GAVE.EHE. ML:1.4 0.0001805 0.14 AML other m 2021-10-08T00:29:38.59
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