Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 06-07-2020 and time 17:35:20 (UTC) in region 1 km W Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 1 km W Norcia (PG), on

  • 06-07-2020 17:35:20 (UTC)
  • 06-07-2020 19:35:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7950, 13.0840 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 1 4957 4957
Preci PG 10 724 5681
Cascia PG 10 3217 8898
Castelsantangelo sul Nera MC 13 281 9179
Cerreto di Spoleto PG 14 1075 10254
Poggiodomo PG 15 117 10371
Visso MC 15 1107 11478
Sellano PG 17 1079 12557
Ussita MC 17 444 13001
Accumoli RI 17 667 13668
Arquata del Tronto AP 18 1178 14846
Vallo di Nera PG 18 364 15210
Monteleone di Spoleto PG 19 599 15809

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
100 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
Reviewed
Rev100 		ML 1.2 2020-07-06
17:35:20		 42.7952 13.0837 11 2020-07-06
17:49:35		 Sala Sismica INGV-Roma 80835611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-06 17:35:20 ± 0.05
Latitude 42.7952 ± 0.0027
Longitude 13.0837 ± 0.0037
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 80835611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 359
Semi-minor axis of confidence ellipse (meter) 191
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 295
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.30937
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 80835611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-06 17:49:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-07-06T17:35:32.20 0.3 undecidable manual S 17 34.3434 50 0.2 69
IV.FIAM.HHZ. 2020-07-06T17:35:31.02 3.0 undecidable manual P -0.06 0
IV.SMA1.EHZ. 2020-07-06T17:35:30.40 0.6 undecidable manual S 132 27.4503 50 0.23 46
IV.FDMO.HHZ. 2020-07-06T17:35:29.80 0.3 undecidable manual S 1 26.751 50 -0.18 70
IV.MTRA.HNZ. 2020-07-06T17:35:29.65 0.6 undecidable manual S 99 25.8519 50 -0.08 48
IV.LNSS.HHZ. 2020-07-06T17:35:28.60 0.6 undecidable manual S 189 21.6672 50 -0.01 49
IV.MMO1.EHZ. 2020-07-06T17:35:28.70 0.6 undecidable manual S 60 22.8549 50 -0.25 47
IV.MC2.EHZ. 2020-07-06T17:35:27.00 0.6 undecidable manual S 34 15.4734 125 0.09 49
IV.CSP1.EHZ. 2020-07-06T17:35:27.15 0.1 undecidable manual P 17 34.3434 50 0.08 95
IV.GAVE.EHZ. 2020-07-06T17:35:27.90 0.3 undecidable manual S 234 19.1697 50 -0.06 73
IV.MMO1.EHZ. 2020-07-06T17:35:25.30 0.1 undecidable manual P 60 22.8549 50 -0.01 98
IV.MTRA.HNZ. 2020-07-06T17:35:25.79 0.1 undecidable manual P 99 25.8519 50 0.03 97
IV.FDMO.HHZ. 2020-07-06T17:35:25.89 0.1 undecidable manual P 1 26.751 50 -0.01 97
IV.LNSS.HHZ. 2020-07-06T17:35:25.20 0.1 undecidable manual P 189 21.6672 50 0.09 97
IV.SMA1.EHZ. 2020-07-06T17:35:25.86 0.1 undecidable manual P 132 27.4503 50 -0.16 94
IV.NRCA.HHZ. 2020-07-06T17:35:24.10 0.6 undecidable manual S 30 4.8951 156 -0.39 47
IV.GAVE.EHZ. 2020-07-06T17:35:24.75 0.1 undecidable manual P 234 19.1697 50 0.01 98
IV.MC2.EHZ. 2020-07-06T17:35:24.32 0.1 undecidable manual P 34 15.4734 125 0.19 96
IV.NRCA.HHZ. 2020-07-06T17:35:22.79 0.1 undecidable manual P 30 4.8951 156 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.7 0.0007130000000000001 0.14 AML other m 2020-07-06T17:35:24.25
IV.NRCA.HHE. ML:1.4 0.00035250000000000006 0.2 AML other m 2020-07-06T17:35:24.24
IV.GAVE.EHE. ML:0.9 0.00006615 0.18 AML other m 2020-07-06T17:35:28.26
IV.GAVE.EHN. ML:0.8 0.000048549999999999994 1.3 AML other m 2020-07-06T17:35:28.26
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