Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 09-08-2020 and time 19:12:47 (Italy) in region 4 km SW Norcia (PG)

A magnitude ML 1.4 earthquake occured in region: 4 km SW Norcia (PG), on

  • 09-08-2020 17:12:47 (UTC)
  • 09-08-2020 19:12:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7710, 13.0630 at 10 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
Norcia PG 4 4957 4957
Cascia PG 7 3217 8174
Preci PG 12 724 8898
Poggiodomo PG 12 117 9015
Cerreto di Spoleto PG 13 1075 10090
Castelsantangelo sul Nera MC 16 281 10371
Monteleone di Spoleto PG 16 599 10970
Vallo di Nera PG 16 364 11334
Sellano PG 17 1079 12413
Accumoli RI 17 667 13080
Visso MC 18 1107 14187
Cittareale RI 19 482 14669
Sant'Anatolia di Narco PG 19 564 15233
Arquata del Tronto AP 19 1178 16411
Scheggino PG 20 461 16872

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of Foligno (57155 inhabitants)
41 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
88 Km E of Viterbo (67173 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
93 Km W of Montesilvano (53738 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 1.4 2020-08-09
17:12:47		 42.7708 13.0633 10 2020-08-09
17:20:04		 Sala Sismica INGV-Roma 81819151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-09 17:12:47 ± 0.05
Latitude 42.7708 ± 0.0027
Longitude 13.0633 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81819151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 326
Semi-minor axis of confidence ellipse (meter) 269
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 290
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.07285
Epicentral distance of station farthest from the epicenter (degree) 0.42358
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 81819151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-09 17:20:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SMA1.EHZ. 2020-08-09T17:12:57.45 0.6 undecidable manual S 125 27.0507 50 0.12 63
IV.FDMO.HHZ. 2020-08-09T17:12:57.65 0.6 undecidable manual S 4 29.5482 50 -0.33 60
IV.MTRA.EHZ. 2020-08-09T17:12:57.22 0.6 undecidable manual S 93 27.1506 50 -0.13 63
IV.T1299.EHZ. 2020-08-09T17:12:56.49 0.6 undecidable manual S 130 23.4543 50 0.14 64
IV.MMO1.EHZ. 2020-08-09T17:12:56.69 0.3 undecidable manual S 56 25.752 50 -0.28 92
IV.TERO.HHZ. 2020-08-09T17:12:56.01 0.3 undecidable manual P 110 47.0196 50 -0.23 90
IV.MF5.EHZ. 2020-08-09T17:12:55.71 0.3 undecidable manual P 53 40.2264 50 0.52 85
IV.GUMA.HHZ. 2020-08-09T17:12:55.24 0.3 undecidable manual P 34 39.2274 50 0.21 91
IV.ASSB.HHZ. 2020-08-09T17:12:55.85 0.3 undecidable manual P 313 44.622 50 -0.01 94
IV.MOMA.HHZ. 2020-08-09T17:12:55.46 0.3 undecidable manual P 275 40.3263 50 0.25 90
IV.FEMA.HNZ. 2020-08-09T17:12:55.48 0.6 undecidable manual S 357 21.2676 116 -0.2 63
IV.CESX.HHZ. 2020-08-09T17:12:55.16 0.3 undecidable manual P 245 42.8238 50 -0.43 87
IV.LNSS.HHZ. 2020-08-09T17:12:54.75 0.6 undecidable manual S 186 18.7701 119 -0.16 64
IV.MC2.EHZ. 2020-08-09T17:12:54.88 0.6 undecidable manual S 33 18.6702 119 0 66
IV.CSP1.EHZ. 2020-08-09T17:12:54.88 0.3 undecidable manual P 18 37.4292 50 0.12 93
IV.GAVE.EHZ. 2020-08-09T17:12:54.17 0.6 undecidable manual S 238 16.2726 122 -0.02 66
IV.ARRO.EHZ. 2020-08-09T17:12:53.86 0.3 undecidable manual P 229 32.2455 50 -0.11 95
IV.CESI.HNZ. 2020-08-09T17:12:53.65 0.3 undecidable manual P 334 28.9488 50 0.19 93
IV.MTRA.EHZ. 2020-08-09T17:12:53.03 0.3 undecidable manual P 93 27.1506 50 -0.15 95
IV.SMA1.EHZ. 2020-08-09T17:12:53.23 0.3 undecidable manual P 125 27.0507 50 0.06 96
IV.FDMO.HHZ. 2020-08-09T17:12:53.44 0.3 undecidable manual P 4 29.5482 50 -0.1 95
IV.MMO1.EHZ. 2020-08-09T17:12:52.83 0.3 undecidable manual P 56 25.752 50 -0.13 95
IV.T1299.EHZ. 2020-08-09T17:12:52.80 0.3 undecidable manual P 130 23.4543 50 0.2 94
IV.FEMA.HNZ. 2020-08-09T17:12:52.48 0.3 undecidable manual P 357 21.2676 116 0.27 93
IV.GAVE.EHZ. 2020-08-09T17:12:51.39 0.3 undecidable manual P 238 16.2726 122 0.04 99
IV.LNSS.HHZ. 2020-08-09T17:12:51.82 0.3 undecidable manual P 186 18.7701 119 0.05 98
IV.NRCA.HNZ. 2020-08-09T17:12:51.79 0.6 undecidable manual S 31 8.0808 142 -0.25 64
IV.MC2.EHZ. 2020-08-09T17:12:51.84 0.3 undecidable manual P 33 18.6702 119 0.09 97
IV.NRCA.HNZ. 2020-08-09T17:12:50.15 0.3 undecidable manual P 31 8.0808 142 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.0 0.00008360358 0.2944 AML other m 2020-08-09T17:12:59.33
IV.SMA1.EHN. ML:0.0 0.00008555704 0.384 AML other m 2020-08-09T17:13:00.29
IV.NRCA.HHE. ML:1.6 0.0005663913000000001 0.1152 AML other m 2020-08-09T17:12:52.15
IV.NRCA.HHN. ML:1.7 0.0007136144 0.1408 AML other m 2020-08-09T17:12:51.85
IV.NRCA.HNE. ML:1.6 0.0005270145000000001 0.1024 AML other m 2020-08-09T17:12:52.15
IV.GAVE.EHE. ML:1.7 0.0004089739 0.2304 AML other m 2020-08-09T17:12:54.34
IV.GAVE.EHN. ML:1.6 0.00037407144999999995 0.1408 AML other m 2020-08-09T17:12:54.81
IV.GAVE.HNE. ML:1.7 0.0004516676 0.1152 AML other m 2020-08-09T17:12:54.81
IV.GAVE.HNN. ML:1.2 0.00014068645000000002 0.2432 AML other m 2020-08-09T17:12:54.35
IV.LNSS.HHE. ML:1.5 0.00026420345 0.2176 AML other m 2020-08-09T17:12:55.30
IV.LNSS.HHN. ML:1.6 0.0003458341 0.1408 AML other m 2020-08-09T17:12:55.35
IV.LNSS.HNE. ML:1.5 0.0002314881 0.128 AML other m 2020-08-09T17:12:55.24
IV.LNSS.HNN. ML:1.6 0.00029781124999999996 0.1536 AML other m 2020-08-09T17:12:55.42
IV.MTRA.EHE. ML:1.4 0.0001524838 0.256 AML other m 2020-08-09T17:12:58.60
IV.MTRA.EHN. ML:1.4 0.0001452272 0.1664 AML other m 2020-08-09T17:12:58.14
IV.MTRA.HNE. ML:1.5 0.0001705085 0.2432 AML other m 2020-08-09T17:12:58.60
IV.MTRA.HNN. ML:1.4 0.00013839107000000002 0.1792 AML other m 2020-08-09T17:12:58.14
IV.FDMO.HHE. ML:1.1 0.000062223775 0.1536 AML other m 2020-08-09T17:12:58.32
IV.FDMO.HHN. ML:1.3 0.00008753845999999999 0.1536 AML other m 2020-08-09T17:12:58.48
IV.GUMA.HNE. ML:1.7 0.0001583675 0.4736 AML other m 2020-08-09T17:13:04.10
IV.GUMA.HHE. ML:1.6 0.00012256735 0.384 AML other m 2020-08-09T17:13:04.28
IV.GUMA.HHN. ML:1.4 0.00008657478 0.2432 AML other m 2020-08-09T17:13:02.37
IV.MOMA.HHE. ML:1.4 0.000090285635 0.2048 AML other m 2020-08-09T17:13:02.99
IV.MOMA.HHN. ML:1.5 0.00010746475 0.1408 AML other m 2020-08-09T17:13:02.71
IV.ASSB.HHE. ML:1.2 0.000052253264999999994 0.1792 AML other m 2020-08-09T17:13:03.82
IV.ASSB.HHN. ML:1.3 0.000057155285 0.1792 AML other m 2020-08-09T17:13:03.82
IV.TERO.HHE. ML:1.2 0.00004468726 0.1408 AML other m 2020-08-09T17:13:03.53
IV.TERO.HHN. ML:1.2 0.00004005823 0.2432 AML other m 2020-08-09T17:13:04.72
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