Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 09-08-2021 and time 18:11:10 (Italy) in region 5 km S Preci (PG)

A magnitude ML 1.5 earthquake occured in region: 5 km S Preci (PG), on

  • 09-08-2021 16:11:10 (UTC)
  • 09-08-2021 18:11:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8350, 13.0430 at 11 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 5 724 724
Norcia PG 6 4957 5681
Cerreto di Spoleto PG 10 1075 6756
Castelsantangelo sul Nera MC 11 281 7037
Sellano PG 11 1079 8116
Visso MC 11 1107 9223
Cascia PG 13 3217 12440
Ussita MC 15 444 12884
Poggiodomo PG 16 117 13001
Vallo di Nera PG 16 364 13365
Monte Cavallo MC 18 145 13510

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
58 Km W of Teramo (54892 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
61 Km SE of Perugia (166134 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km N of Guidonia Montecelio (88673 inhabitants)
97 Km W of Montesilvano (53738 inhabitants)
99 Km N of Tivoli (56533 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 1.5 2021-08-09
16:11:10		 42.8352 13.0432 11 2021-12-29
11:12:30		 Bollettino Sismico Italiano INGV 95414641
Reviewed
Rev100 		ML 1.6 2021-08-09
16:11:10		 42.8352 13.0423 10 2021-08-09
16:22:36		 Sala Sismica INGV-Roma 93890321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-09 16:11:10 ± 0.04
Latitude 42.8352 ± 0.0018
Longitude 13.0432 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95414641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 286
Semi-minor axis of confidence ellipse (meter) 163
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 98
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 30
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 37
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) 0.05216
Epicentral distance of station farthest from the epicenter (degree) 0.68618
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 95414641
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-15 07:34:03

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 93890321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-09 16:22:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGAB.HHZ. 2021-08-09T16:11:23.25 0.6 undecidable manual P 277 76.1682 50 -0.45 42
IT.MMP1.HGE. 2021-08-09T16:11:22.30 0.3 undecidable manual P 200 69.2751 50 -0.35 65
IV.MML1.EHZ. 2021-08-09T16:11:21.60 0.3 undecidable manual S 349 31.4463 50 0.18 73
IV.MTRA.EHE. 2021-08-09T16:11:21.10 0.3 undecidable manual S 107 30.0477 50 0.05 75
IV.CSP1.EHZ. 2021-08-09T16:11:21.40 0.3 undecidable manual S 25 31.3464 50 -0.01 75
IV.EL6.EHZ. 2021-08-09T16:11:20.46 0.3 undecidable manual P 5 55.0005 50 0.02 72
IV.LNSS.HHZ. 2021-08-09T16:11:19.60 0.6 undecidable manual S 181 25.752 50 -0.31 47
IV.ATCC.EHZ. 2021-08-09T16:11:19.89 0.6 undecidable manual P 320 50.8158 50 0.1 47
IV.GAVE.EHZ. 2021-08-09T16:11:18.40 0.3 undecidable manual S 217 19.9689 118 0.04 76
IV.CESI.HNZ. 2021-08-09T16:11:18.80 0.3 undecidable manual S 329 21.9669 50 -0.09 75
IV.CAMP.HHE. 2021-08-09T16:11:18.89 0.3 undecidable manual P 138 44.622 50 0.05 73
IV.CESX.HHZ. 2021-08-09T16:11:18.98 0.6 undecidable manual P 236 44.9217 50 0.1 48
IV.FDMO.HHZ. 2021-08-09T16:11:18.80 0.3 undecidable manual S 9 22.6551 50 -0.27 72
IV.MOMA.HNZ. 2021-08-09T16:11:18.19 0.3 undecidable manual P 265 38.628 50 0.27 70
IV.MF5.EHZ. 2021-08-09T16:11:18.19 0.3 undecidable manual P 63 37.8288 50 0.4 68
IV.ARRO.EHZ. 2021-08-09T16:11:17.63 0.3 undecidable manual P 219 36.3414 50 0.07 74
IV.PF6.EHN. 2021-08-09T16:11:17.17 0.3 undecidable manual P 20 35.742 50 -0.3 70
IT.MTCL.HGZ. 2021-08-09T16:11:17.50 0.3 undecidable manual S 349 17.9709 121 -0.25 73
IV.RM33.EHZ. 2021-08-09T16:11:17.87 0.3 undecidable manual P 159 38.8278 50 -0.07 73
IV.GUMA.HHZ. 2021-08-09T16:11:17.68 0.6 undecidable manual P 43 34.6431 50 0.38 46
IV.ASSB.HHZ. 2021-08-09T16:11:17.95 0.1 undecidable manual P 307 38.8278 50 0.01 99
IT.GNU.HGE. 2021-08-09T16:11:17.93 0.3 undecidable manual P 265 38.628 50 0.01 74
IV.CSP1.EHZ. 2021-08-09T16:11:16.81 0.1 undecidable manual P 25 31.3464 50 0.01 100
IV.MC2.EHZ. 2021-08-09T16:11:16.70 0.3 undecidable manual S 54 14.5743 126 -0.07 76
IV.MTRA.EHE. 2021-08-09T16:11:16.58 0.3 undecidable manual P 107 30.0477 50 -0.01 75
IV.FEMA.HNZ. 2021-08-09T16:11:16.50 0.3 undecidable manual S 2 14.0748 127 -0.14 75
IV.MML1.EHZ. 2021-08-09T16:11:16.81 0.3 undecidable manual P 349 31.4463 50 0 75
IV.SMA1.EHN. 2021-08-09T16:11:16.72 0.6 undecidable manual P 134 32.8449 50 -0.31 47
IV.GAVE.EHZ. 2021-08-09T16:11:15.19 0.1 undecidable manual P 217 19.9689 118 0.16 99
IV.LNSS.HHZ. 2021-08-09T16:11:15.95 0.3 undecidable manual P 181 25.752 50 0.01 76
IV.CESI.HNZ. 2021-08-09T16:11:15.37 0.3 undecidable manual P 329 21.9669 50 0.03 76
IV.FDMO.HHZ. 2021-08-09T16:11:15.44 0.3 undecidable manual P 9 22.6551 50 -0.01 76
IT.MTCL.HGZ. 2021-08-09T16:11:14.79 0.3 undecidable manual P 349 17.9709 121 0.1 75
IV.FEMA.HNZ. 2021-08-09T16:11:14.24 0.3 undecidable manual P 2 14.0748 127 0.2 74
IV.MC2.EHZ. 2021-08-09T16:11:14.37 0.1 undecidable manual P 54 14.5743 126 0.25 98
IV.NRCA.HNZ. 2021-08-09T16:11:14.40 0.3 undecidable manual S 92 5.7942 152 -0.32 74
IV.NRCA.HNZ. 2021-08-09T16:11:13.04 0.3 undecidable manual P 92 5.7942 152 0.1 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2.0 0.001695 0.58 AML other m 2021-08-09T16:11:14.20
IV.NRCA.HNE. ML:2.0 0.0017268259999999999 0.1792 AML other m 2021-08-09T16:11:14.49
IV.NRCA.HHE. ML:2.1 0.0018 0.18 AML other m 2021-08-09T16:11:14.49
IV.NRCA.HNN. ML:2.0 0.001415 0.1 AML other m 2021-08-09T16:11:15.20
IV.GAVE.EHN. ML:1.8 0.0005275 1.12 AML other m 2021-08-09T16:11:18.59
IV.GAVE.EHE. ML:1.8 0.00047750000000000006 0.74 AML other m 2021-08-09T16:11:19.07
IV.LNSS.HHN. ML:1.8 0.000377 0.16 AML other m 2021-08-09T16:11:20.33
IV.LNSS.HHE. ML:1.7 0.00029000000000000006 0.78 AML other m 2021-08-09T16:11:20.29
IV.MML1.EHN. ML:1.2 0.0000757 0.56 AML other m 2021-08-09T16:11:22.64
IV.MML1.EHE. ML:1.2 0.00007274999999999999 0.26 AML other m 2021-08-09T16:11:23.05
IV.CSP1.EHN. ML:2.0 0.0004455 0.42 AML other m 2021-08-09T16:11:23.19
IV.GUMA.HHN. ML:1.8 0.00024042819999999998 0.3456 AML other m 2021-08-09T16:11:23.88
IV.CSP1.EHE. ML:1.9 0.000354 0.46 AML other m 2021-08-09T16:11:23.71
IV.RM33.EHE. ML:1.2 0.00005574999999999999 1.08 AML other m 2021-08-09T16:11:24.02
IV.ARRO.EHE. ML:1.3 0.00007475000000000001 0.12 AML other m 2021-08-09T16:11:24.66
IV.RM33.EHN. ML:1.2 0.00005044999999999999 0.14 AML other m 2021-08-09T16:11:24.64
IV.ARRO.EHN. ML:1.4 0.0001 0.7 AML other m 2021-08-09T16:11:24.34
IV.ASSB.HHE. ML:1.2 0.00005714999999999999 1.76 AML other m 2021-08-09T16:11:24.92
IV.ASSB.HHN. ML:1.2 0.00006204999999999999 1.4 AML other m 2021-08-09T16:11:25.80
IV.CESX.HHE. ML:1.3 0.0000562 0.18 AML other m 2021-08-09T16:11:27.20
IV.CESX.HHN. ML:1.3 0.0000649 0.22 AML other m 2021-08-09T16:11:27.86
IV.ATCC.EHE. ML:1.2 0.0000446 0.24 AML other m 2021-08-09T16:11:29.55
IV.ATCC.EHN. ML:1.3 0.000048799999999999994 0.66 AML other m 2021-08-09T16:11:30.02
IV.GUMA.HHE. ML:1.9 0.0003005 0.4 AML other m 2021-08-09T16:11:31.36
IV.GAVE.HNE. ML:1.8 0.0004335984 0.192 AML other m 2021-08-09T16:11:20.31
IV.GAVE.HNN. ML:1.3 0.0001587666 0.1024 AML other m 2021-08-09T16:11:18.98
IV.LNSS.HNN. ML:1.8 0.00034364095 0.1664 AML other m 2021-08-09T16:11:20.35
IV.LNSS.HNE. ML:1.6 0.00020159295 0.0896 AML other m 2021-08-09T16:11:20.25
IV.MML1.HNN. ML:1.1 0.0000617973285 0.192 AML other m 2021-08-09T16:11:22.20
IV.MML1.HNE. ML:1.2 0.00006446088499999999 0.1408 AML other m 2021-08-09T16:11:23.06
IV.MF5.EHN. ML:1.4 0.00009704271999999999 0.2944 AML other m 2021-08-09T16:11:24.82
IV.MF5.EHE. ML:1.6 0.00016365476 0.32 AML other m 2021-08-09T16:11:24.69
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