Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 03-07-2020 and time 23:45:33 (UTC) in region 5 km NW Norcia (PG)

A magnitude ML 0.8 earthquake occured in region: 5 km NW Norcia (PG), on

  • 03-07-2020 23:45:33 (UTC)
  • 04-07-2020 01:45:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8350, 13.0700 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
Norcia PG 5 4957 4957
Preci PG 6 724 5681
Castelsantangelo sul Nera MC 10 281 5962
Visso MC 11 1107 7069
Cerreto di Spoleto PG 13 1075 8144
Sellano PG 13 1079 9223
Ussita MC 14 444 9667
Cascia PG 14 3217 12884
Poggiodomo PG 17 117 13001
Vallo di Nera PG 18 364 13365
Monte Cavallo MC 19 145 13510
Arquata del Tronto AP 20 1178 14688

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
55 Km W of Teramo (54892 inhabitants)
60 Km NW of L'Aquila (69753 inhabitants)
63 Km E of Perugia (166134 inhabitants)
92 Km NE of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
97 Km N of Guidonia Montecelio (88673 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 		Md 1.5
ML 0.8 		2020-07-03
23:45:33		 42.8348 13.0698 11 2020-11-19
12:37:07		 Bollettino Sismico Italiano INGV 84763221
Reviewed
Rev100 		Md 1.5 2020-07-03
23:45:33		 42.8313 13.0708 10 2020-07-03
23:54:08		 Sala Sismica INGV-Roma 80748741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-03 23:45:33 ± 0.05
Latitude 42.8348 ± 0.0027
Longitude 13.0698 ± 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 84763221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 316
Semi-minor axis of confidence ellipse (meter) 269
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 46
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.03238
Epicentral distance of station farthest from the epicenter (degree) 0.44606
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 84763221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-16 03:46:51

Md:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude Md
Reference to an origin 84763221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-16 03:46:51

Md:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude Md
Reference to an origin 80748741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-03 23:54:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-07-03T23:45:49.86 0.6 undecidable manual S 118 49.5171 50 0.25 44
IV.SMA1.EHZ. 2020-07-03T23:45:44.79 0.6 undecidable manual S 136 31.3464 50 0.02 48
IV.MTRA.EHZ. 2020-07-03T23:45:43.92 0.6 undecidable manual S 108 27.9498 50 0.05 47
IV.CESI.HHE. 2020-07-03T23:45:42.56 0.6 undecidable manual S 325 23.1546 50 -0.02 48
IV.FDMO.HHZ. 2020-07-03T23:45:42.20 0.6 undecidable manual S 4 22.4553 50 -0.18 47
IV.TERO.HHZ. 2020-07-03T23:45:42.85 0.3 undecidable manual P 118 49.5171 50 -0.12 68
IV.MMO1.EHZ. 2020-07-03T23:45:42.07 0.6 undecidable manual S 71 22.0668 50 -0.23 46
IV.GAVE.EHZ. 2020-07-03T23:45:42.03 0.6 undecidable manual S 222 21.3675 50 -0.06 48
IV.SMA1.EHZ. 2020-07-03T23:45:40.12 0.3 undecidable manual P 136 31.3464 50 -0.05 71
IV.MC2.EHZ. 2020-07-03T23:45:39.92 0.6 undecidable manual S 49 12.876 130 0.17 48
IV.MTRA.EHZ. 2020-07-03T23:45:39.62 0.3 undecidable manual P 108 27.9498 50 -0.04 71
IV.MMO1.EHZ. 2020-07-03T23:45:38.70 0.1 undecidable manual P 71 22.0668 50 -0.04 96
IV.GAVE.EHZ. 2020-07-03T23:45:38.74 0.3 undecidable manual P 222 21.3675 50 0.11 71
IV.CESI.HHE. 2020-07-03T23:45:38.89 0.1 undecidable manual P 325 23.1546 50 -0.02 96
IV.FDMO.HHZ. 2020-07-03T23:45:38.95 0.3 undecidable manual P 4 22.4553 50 0.16 70
IV.NRCA.HHZ. 2020-07-03T23:45:37.51 0.6 undecidable manual S 92 3.5964 162 -0.37 46
IV.MC2.EHZ. 2020-07-03T23:45:37.44 0.1 undecidable manual P 49 12.876 130 0.16 95
IV.NRCA.HHZ. 2020-07-03T23:45:36.20 0.1 undecidable manual P 92 3.5964 162 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:0.9 0.000132000895 0.064 AML other m 2020-07-03T23:45:37.73
IV.NRCA.HNN. ML:1.0 0.00016925019999999998 0.064 AML other m 2020-07-03T23:45:37.53
IV.NRCA.HHN. ML:1.1 0.0001908456 0.0512 AML other m 2020-07-03T23:45:37.53
IV.NRCA.HHE. ML:0.9 0.0001418824 0.0768 AML other m 2020-07-03T23:45:37.73
IV.GAVE.EHN. ML:0.6 0.000024147135 0.1408 AML other m 2020-07-03T23:45:42.94
IV.GAVE.EHE. ML:0.6 0.000023913685 0.2176 AML other m 2020-07-03T23:45:42.91
IV.FDMO.HHN. ML:0.2 0.000011712236899999999 0.2176 AML other m 2020-07-03T23:45:42.34
IV.MTRA.EHN. ML:0.6 0.00001992364 0.2048 AML other m 2020-07-03T23:45:44.39
IV.MTRA.EHE. ML:0.7 0.000023251645000000003 0.1536 AML other m 2020-07-03T23:45:44.02
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