Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 25-08-2020 and time 10:32:55 (UTC) in region 2 km NE Norcia (PG)

A magnitude ML 1.6 earthquake occured in region: 2 km NE Norcia (PG), on

  • 25-08-2020 10:32:55 (UTC)
  • 25-08-2020 12:32:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8100, 13.1070 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
Norcia PG 2 4957 4957
Preci PG 10 724 5681
Castelsantangelo sul Nera MC 10 281 5962
Cascia PG 13 3217 9179
Visso MC 14 1107 10286
Ussita MC 15 444 10730
Cerreto di Spoleto PG 16 1075 11805
Arquata del Tronto AP 16 1178 12983
Sellano PG 17 1079 14062
Accumoli RI 17 667 14729
Poggiodomo PG 18 117 14846
Montegallo AP 19 523 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 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 2020-08-25
10:32:55		 42.8102 13.1072 9 2020-11-19
12:36:59		 Bollettino Sismico Italiano INGV 82562761
Reviewed
Rev100 		ML 1.6 2020-08-25
10:32:55		 42.8247 13.0808 10 2020-08-25
10:36:53		 Sala Sismica INGV-Roma 82312231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-25 10:32:55 ± 0.05
Latitude 42.8102 ± 0.0027
Longitude 13.1072 ± 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 82562761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 306
Semi-minor axis of confidence ellipse (meter) 205
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 73
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) 62
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 53
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.02428
Epicentral distance of station farthest from the epicenter (degree) 0.69787
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 82562761
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-09-02 14:56:10

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 82312231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-25 10:36:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2020-08-25T10:33:20.11 0.3 undecidable manual S 350 77.4669 50 1.12 47
IV.MURB.HHZ. 2020-08-25T10:33:16.97 0.3 undecidable manual S 317 68.9754 50 0.26 66
IV.EL6.EHZ. 2020-08-25T10:33:13.85 0.3 undecidable manual S 360 57.5979 50 0.17 69
IV.SNTG.HHE. 2020-08-25T10:33:12.37 0.3 undecidable manual S 345 51.2154 50 0.41 66
IV.CESX.HHZ. 2020-08-25T10:33:11.34 0.6 undecidable manual S 242 47.9187 50 0.23 46
IV.ASSB.HHZ. 2020-08-25T10:33:10.13 0.3 undecidable manual S 305 44.622 50 -0.09 71
IV.MOMA.HHZ. 2020-08-25T10:33:10.28 0.3 undecidable manual S 269 43.7229 50 0.31 68
IV.TERO.HHZ. 2020-08-25T10:33:10.13 0.6 undecidable manual S 117 45.5211 50 -0.32 45
IV.SAP2.EHZ. 2020-08-25T10:33:09.44 0.3 undecidable manual S 37 39.627 50 0.56 65
IV.MURB.HHZ. 2020-08-25T10:33:08.09 0.1 undecidable manual P 317 68.9754 50 0.36 86
IV.MF5.EHZ. 2020-08-25T10:33:08.20 0.6 undecidable manual S 55 34.743 50 0.62 42
IV.CAMP.HHE. 2020-08-25T10:33:08.42 0.3 undecidable manual S 141 39.1275 50 -0.33 69
IV.ARRO.EHZ. 2020-08-25T10:33:08.74 0.6 undecidable manual S 227 37.8288 50 0.34 46
IV.ARVD.HHZ. 2020-08-25T10:33:08.63 0.6 undecidable manual P 350 77.4669 50 -0.41 42
IV.RM33.EHZ. 2020-08-25T10:33:07.48 0.3 undecidable manual S 165 34.5432 50 -0.04 73
IV.PF6.EHN. 2020-08-25T10:33:07.71 0.3 undecidable manual S 11 37.0296 50 -0.48 67
IV.GUMA.HHZ. 2020-08-25T10:33:07.34 0.3 undecidable manual S 33 33.5442 50 0.07 73
IV.MML1.HNE. 2020-08-25T10:33:07.44 0.3 undecidable manual S 342 35.4423 50 -0.31 69
IV.EL6.EHZ. 2020-08-25T10:33:05.71 0.1 undecidable manual P 360 57.5979 50 -0.27 90
IV.MNTT.EHZ. 2020-08-25T10:33:05.41 0.3 undecidable manual P 55 48.5181 50 0.83 57
IV.CESI.HHZ. 2020-08-25T10:33:05.04 0.3 undecidable manual S 323 27.1506 109 -0.39 69
IV.SMA1.EHZ. 2020-08-25T10:33:05.26 0.3 undecidable manual S 137 27.2505 109 -0.2 72
IV.MTRA.EHZ. 2020-08-25T10:33:04.42 0.3 undecidable manual S 104 24.2535 111 -0.07 74
IV.CESX.HHZ. 2020-08-25T10:33:04.27 0.1 undecidable manual P 242 47.9187 50 -0.22 92
IV.FDMO.HHZ. 2020-08-25T10:33:04.17 0.3 undecidable manual S 356 25.1526 110 -0.6 65
IV.SNTG.HHE. 2020-08-25T10:33:04.88 0.1 undecidable manual P 345 51.2154 50 -0.11 94
IV.T1299.HNN. 2020-08-25T10:33:04.91 0.3 undecidable manual S 144 24.1536 111 0.46 69
IV.ASSB.HHZ. 2020-08-25T10:33:03.63 0.1 undecidable manual P 305 44.622 50 -0.35 90
IV.MMO1.EHZ. 2020-08-25T10:33:03.00 0.3 undecidable manual S 61 20.4684 115 -0.25 72
IV.SAP2.EHZ. 2020-08-25T10:33:03.41 0.1 undecidable manual P 37 39.627 50 0.2 94
IV.MOMA.HHZ. 2020-08-25T10:33:03.83 0.1 undecidable manual P 269 43.7229 50 -0.01 97
IV.GAVE.EHZ. 2020-08-25T10:33:03.84 0.3 undecidable manual S 233 21.7671 113 0.17 73
IV.TERO.HHZ. 2020-08-25T10:33:03.81 0.1 undecidable manual P 117 45.5211 50 -0.31 91
IV.CAMP.HHE. 2020-08-25T10:33:02.84 0.1 undecidable manual P 141 39.1275 50 -0.29 92
IV.ARRO.EHZ. 2020-08-25T10:33:02.85 0.1 undecidable manual P 227 37.8288 50 -0.08 97
IV.MML1.HNE. 2020-08-25T10:33:02.21 0.1 undecidable manual P 342 35.4423 50 -0.35 92
IV.RM33.EHZ. 2020-08-25T10:33:02.29 0.1 undecidable manual P 165 34.5432 50 -0.14 96
IV.PF6.EHN. 2020-08-25T10:33:02.41 0.1 undecidable manual P 11 37.0296 50 -0.4 90
IV.GUMA.HHZ. 2020-08-25T10:33:02.26 0.1 undecidable manual P 33 33.5442 50 -0.02 99
IV.FEMA.HNE. 2020-08-25T10:33:02.20 0.3 undecidable manual S 345 17.4714 118 -0.14 74
IV.MF5.EHZ. 2020-08-25T10:33:02.60 0.1 undecidable manual P 55 34.743 50 0.14 96
IV.SMA1.EHZ. 2020-08-25T10:33:01.14 0.1 undecidable manual P 137 27.2505 109 -0.09 98
IV.MC2.EHZ. 2020-08-25T10:33:01.40 0.3 undecidable manual S 31 13.0758 126 0.37 71
IV.CESI.HHZ. 2020-08-25T10:33:01.04 0.1 undecidable manual P 323 27.1506 109 -0.18 97
IV.GAVE.EHZ. 2020-08-25T10:33:00.38 0.1 undecidable manual P 233 21.7671 113 0.18 97
IV.MTRA.EHZ. 2020-08-25T10:33:00.54 0.1 undecidable manual P 104 24.2535 111 -0.14 98
IV.FDMO.HHZ. 2020-08-25T10:33:00.60 0.1 undecidable manual P 356 25.1526 110 -0.24 96
IV.T1299.HNN. 2020-08-25T10:33:00.89 0.1 undecidable manual P 144 24.1536 111 0.24 96
IV.FEMA.HNE. 2020-08-25T10:32:59.54 0.1 undecidable manual P 345 17.4714 118 0.1 100
IV.MMO1.EHZ. 2020-08-25T10:32:59.90 0.1 undecidable manual P 61 20.4684 115 -0.06 100
IV.NRCA.HHZ. 2020-08-25T10:32:58.98 0.3 undecidable manual S 12 2.6973 164 0.15 76
IV.MC2.EHZ. 2020-08-25T10:32:58.99 0.1 undecidable manual P 31 13.0758 126 0.31 96
IV.NRCA.HHZ. 2020-08-25T10:32:57.76 0.1 undecidable manual P 12 2.6973 164 0.35 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.8 0.000483 0.32 AML other m 2020-08-25T10:33:04.19
IV.GAVE.EHE. ML:1.9 0.00063 0.76 AML other m 2020-08-25T10:33:04.07
IV.FDMO.HHN. ML:1.5 0.0001955 0.48 AML other m 2020-08-25T10:33:04.77
IV.FDMO.HHE. ML:1.6 0.000225 0.8 AML other m 2020-08-25T10:33:04.49
IV.CESI.HHE. ML:1.4 0.0001505 0.18 AML other m 2020-08-25T10:33:05.32
IV.CESI.HHN. ML:1.8 0.0003165 0.4 AML other m 2020-08-25T10:33:05.52
IV.MTRA.EHN. ML:1.7 0.0002985 1.42 AML other m 2020-08-25T10:33:06.03
IV.MTRA.EHE. ML:1.6 0.00027400000000000005 0.98 AML other m 2020-08-25T10:33:06.57
IV.SMA1.EHE. ML:1.5 0.000162 0.56 AML other m 2020-08-25T10:33:06.62
IV.RM33.EHE. ML:1.4 0.00010950000000000002 0.14 AML other m 2020-08-25T10:33:08.62
IV.SMA1.EHN. ML:1.5 0.00016700000000000002 0.54 AML other m 2020-08-25T10:33:09.68
IV.SAP2.EHN. ML:2.6 0.001305 0.16 AML other m 2020-08-25T10:33:09.70
IV.GUMA.HHE. ML:1.8 0.000259 0.42 AML other m 2020-08-25T10:33:09.71
IV.RM33.EHN. ML:1.3 0.00007545 0.26 AML other m 2020-08-25T10:33:10.28
IV.SAP2.EHE. ML:1.8 0.000202 0.14 AML other m 2020-08-25T10:33:10.45
IV.TERO.HHN. ML:1.4 0.00007985 1.22 AML other m 2020-08-25T10:33:10.63
IV.TERO.HHE. ML:1.4 0.00007975 0.6 AML other m 2020-08-25T10:33:10.80
IV.MOMA.HHN. ML:1.4 0.00008035 0.92 AML other m 2020-08-25T10:33:11.01
IV.ARRO.EHE. ML:1.3 0.00006765 0.2 AML other m 2020-08-25T10:33:11.18
IV.ARRO.EHN. ML:1.3 0.00007575 0.2 AML other m 2020-08-25T10:33:11.39
IV.MOMA.HHE. ML:1.5 0.0001007 0.84 AML other m 2020-08-25T10:33:11.25
IV.ASSB.HHN. ML:1.5 0.00009775 0.16 AML other m 2020-08-25T10:33:11.88
IV.GUMA.HHN. ML:1.7 0.00022 0.32 AML other m 2020-08-25T10:33:12.26
IV.ASSB.HHE. ML:1.4 0.00008465 0.52 AML other m 2020-08-25T10:33:12.32
IV.CESX.HHE. ML:1.3 0.000052000000000000004 0.2 AML other m 2020-08-25T10:33:12.87
IV.CESX.HHN. ML:1.4 0.0000637 1.66 AML other m 2020-08-25T10:33:13.85
IV.EL6.EHN. ML:1.6 0.00008054999999999999 0.48 AML other m 2020-08-25T10:33:14.10
IV.EL6.EHE. ML:1.6 0.00008135000000000001 1.38 AML other m 2020-08-25T10:33:17.92
IV.MURB.HHN. ML:1.8 0.00010775 0.32 AML other m 2020-08-25T10:33:20.34
IV.MURB.HHE. ML:1.9 0.000147 0.44 AML other m 2020-08-25T10:33:22.50
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