Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 03-09-2020 and time 22:08:42 (Italy) in region 2 km W Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 2 km W Norcia (PG), on

  • 03-09-2020 20:08:42 (UTC)
  • 03-09-2020 22:08:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7980, 13.0700 at 11 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 2 4957 4957
Preci PG 9 724 5681
Cascia PG 10 3217 8898
Cerreto di Spoleto PG 13 1075 9973
Castelsantangelo sul Nera MC 13 281 10254
Poggiodomo PG 15 117 10371
Visso MC 15 1107 11478
Sellano PG 16 1079 12557
Vallo di Nera PG 17 364 12921
Ussita MC 17 444 13365
Accumoli RI 19 667 14032
Arquata del Tronto AP 19 1178 15210
Monteleone di Spoleto PG 19 599 15809

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
65 Km SE of Perugia (166134 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
98 Km SW of Ancona (100861 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 0.9 2020-09-03
20:08:42		 42.7978 13.0702 11 2020-09-03
20:16:56		 Sala Sismica INGV-Roma 82597721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-03 20:08:42 ± 0.06
Latitude 42.7978 ± 0.0027
Longitude 13.0702 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82597721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 497
Semi-minor axis of confidence ellipse (meter) 309
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 105
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 12
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) 0.31027
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 82597721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-03 20:16:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CMPR.HHZ. 2020-09-03T20:09:55.80 3.0 undecidable manual Sn 0.52 0
IV.NDIM.HHZ. 2020-09-03T20:09:41.60 3.0 undecidable manual Sn -0.63 0
IT.MCLF.HNZ. 2020-09-03T20:09:24.81 3.0 undecidable manual Sn -0.64 0
IV.ROSPO.HHZ. 2020-09-03T20:09:08.79 3.0 undecidable manual Pg 7.87 0
IV.APEC.HHZ. 2020-09-03T20:09:06.61 3.0 undecidable manual Sg 0.19 0
IV.MCIV.CHZ. 2020-09-03T20:09:02.50 3.0 undecidable manual Sn -0.62 0
IV.CSP1.EHZ. 2020-09-03T20:08:54.07 0.3 undecidable manual S 18 34.4433 50 0 72
IV.SMA1.EHZ. 2020-09-03T20:08:52.33 0.1 undecidable manual S 131 28.4493 50 -0.16 94
IV.FDMO.HHZ. 2020-09-03T20:08:51.93 0.1 undecidable manual S 3 26.5512 50 -0.04 96
IV.TERO.HHZ. 2020-09-03T20:08:51.41 3.0 undecidable manual Pn 2.21 0
IV.NARO.HHZ. 2020-09-03T20:08:50.06 3.0 undecidable manual Pn -1.23 0
IV.CSP1.EHZ. 2020-09-03T20:08:49.11 0.1 undecidable manual P 18 34.4433 50 -0.03 95
IV.MC2.EHZ. 2020-09-03T20:08:49.27 0.1 undecidable manual S 37 15.873 125 0.18 95
IV.FOSV.EHZ. 2020-09-03T20:08:49.79 3.0 negative manual Pg 1.39 0
IV.GAVE.EHZ. 2020-09-03T20:08:49.83 0.1 undecidable manual S 231 18.4704 50 0 98
IV.SMA1.EHZ. 2020-09-03T20:08:48.51 0.3 undecidable manual P 131 28.4493 50 0.28 68
IV.MMO1.EHZ. 2020-09-03T20:08:47.46 3.0 undecidable manual P -0.41 0
IV.FDMO.HHZ. 2020-09-03T20:08:47.81 0.1 undecidable manual P 3 26.5512 50 -0.11 95
IV.GAVE.EHZ. 2020-09-03T20:08:46.75 0.1 undecidable manual P 231 18.4704 50 0.06 97
IV.NRCA.HHZ. 2020-09-03T20:08:46.36 0.1 undecidable manual S 42 5.3946 154 -0.27 95
IV.MC2.EHZ. 2020-09-03T20:08:46.40 0.1 undecidable manual P 37 15.873 125 0.14 96
IV.NRCA.HHZ. 2020-09-03T20:08:44.87 0.1 undecidable manual P 42 5.3946 154 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.000442 0.12 AML other m 2020-09-03T20:08:46.49
IV.NRCA.HHE. ML:1.2 0.00025 0.08 AML other m 2020-09-03T20:08:46.58
IV.GAVE.EHN. ML:0.7 0.0000369 0.84 AML other m 2020-09-03T20:08:50.06
IV.GAVE.EHE. ML:0.6 0.0000305 1.8 AML other m 2020-09-03T20:08:51.93
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