Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 17-07-2020 and time 13:28:11 (Italy) in region 3 km NE Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km NE Norcia (PG), on

  • 17-07-2020 11:28:11 (UTC)
  • 17-07-2020 13:28:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8130, 13.1240 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 3 4957 4957
Castelsantangelo sul Nera MC 10 281 5238
Preci PG 10 724 5962
Visso MC 14 1107 7069
Cascia PG 14 3217 10286
Ussita MC 15 444 10730
Arquata del Tronto AP 15 1178 11908
Accumoli RI 17 667 12575
Cerreto di Spoleto PG 17 1075 13650
Montegallo AP 17 523 14173
Sellano PG 18 1079 15252
Poggiodomo PG 19 117 15369
Montemonaco AP 19 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
97 Km W of Pescara (121014 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
100 Km NW of Chieti (51815 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 1.0 2020-07-17
11:28:11		 42.8128 13.1245 10 2020-07-17
11:36:39		 Sala Sismica INGV-Roma 81103141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-17 11:28:11 ± 0.07
Latitude 42.8128 ± 0.0027
Longitude 13.1245 ± 0.0061
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 81103141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 488
Semi-minor axis of confidence ellipse (meter) 302
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) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32106
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 81103141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-17 11:36:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.RORO.HHZ. 2020-07-17T11:29:53.76 3.0 undecidable manual Sn 2.89 0
GU.RRL.HHZ. 2020-07-17T11:29:37.04 3.0 undecidable manual Pg 16.700001 0
IV.OPPE.HNZ. 2020-07-17T11:29:31.37 3.0 undecidable manual Sn 1.24 0
SL.KOGS.BHZ. 2020-07-17T11:29:25.82 3.0 undecidable manual Pg 14.1 0
GU.TRAV.HHZ. 2020-07-17T11:29:19.87 3.0 positive manual Pn 3.22 0
IV.CMPR.HHZ. 2020-07-17T11:29:16.10 3.0 undecidable manual Sn -0.04 0
IV.FIR.HHZ. 2020-07-17T11:29:10.17 3.0 undecidable manual Sg 11.52 0
XK.ALB1.HHZ. 2020-07-17T11:29:09.28 3.0 undecidable manual Pn 2.06 0
OX.VARN.HHZ. 2020-07-17T11:29:09.21 3.0 undecidable manual Pg 10.64 0
IV.RIBO.EHZ.01 2020-07-17T11:28:50.17 3.0 undecidable manual Sn -0.96 0
IV.CPOZ.HHZ. 2020-07-17T11:28:48.71 3.0 undecidable manual Sn -5.4 0
OT.OT13.EHZ. 2020-07-17T11:28:46.62 3.0 negative manual Pg 6.29 0
IV.FIU.EHZ. 2020-07-17T11:28:43.26 3.0 positive manual Pn 0.18 0
IV.APEC.HHZ. 2020-07-17T11:28:41.20 3.0 undecidable manual Sn -0.96 0
IV.NARO.HHZ. 2020-07-17T11:28:40.71 3.0 undecidable manual Sn -1.6 0
IV.MML1.EHZ. 2020-07-17T11:28:23.86 0.6 undecidable manual S 340 35.6421 50 0.1 49
IV.CSP1.EHZ. 2020-07-17T11:28:22.63 0.6 undecidable manual S 12 31.6461 50 -0.08 49
IV.CESI.HNZ. 2020-07-17T11:28:21.62 0.6 undecidable manual S 320 27.8499 50 -0.06 50
IV.LNSS.HNE. 2020-07-17T11:28:20.70 0.6 undecidable manual S 196 24.2535 113 0 51
IV.TERO.HHZ. 2020-07-17T11:28:20.48 3.0 undecidable manual S -0.89 0
IV.FDMO.HHZ. 2020-07-17T11:28:20.75 0.6 undecidable manual S 353 24.9528 112 -0.18 49
IT.MTCL.HGE. 2020-07-17T11:28:19.94 0.6 undecidable manual S 333 22.5552 114 -0.2 49
IV.CSP1.EHZ. 2020-07-17T11:28:18.09 0.6 negative manual P 12 31.6461 50 0.09 49
IV.MMO1.EHE. 2020-07-17T11:28:18.84 0.6 undecidable manual S 60 19.0698 118 -0.22 49
IV.MML1.EHZ. 2020-07-17T11:28:18.45 1.0 undecidable manual P 340 35.6421 50 -0.16 24
IV.CESI.HNZ. 2020-07-17T11:28:17.45 0.1 undecidable manual P 320 27.8499 50 0.04 100
IV.VVLD.HHZ. 2020-07-17T11:28:16.00 3.0 positive manual P -1.32 0
IV.LNSS.HNE. 2020-07-17T11:28:16.69 0.1 undecidable manual P 196 24.2535 113 -0.15 98
IT.MTCL.HGE. 2020-07-17T11:28:16.53 0.3 undecidable manual P 333 22.5552 114 0.01 76
IV.FDMO.HHZ. 2020-07-17T11:28:16.97 0.6 positive manual P 353 24.9528 112 -0.01 50
IV.MMO1.EHE. 2020-07-17T11:28:15.79 0.1 undecidable manual P 60 19.0698 118 -0.11 100
IV.MC2.EHZ. 2020-07-17T11:28:15.10 0.1 undecidable manual P 26 12.1767 130 0.36 96
IV.NRCA.HHZ. 2020-07-17T11:28:14.99 0.6 undecidable manual S 340 2.4975 166 -0.19 51
IV.NRCA.HHZ. 2020-07-17T11:28:13.92 0.1 undecidable manual P 340 2.4975 166 0.27 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.000305 0.14 AML other m 2020-07-17T11:28:15.21
IV.NRCA.HHE. ML:1.1 0.00024249999999999999 0.26 AML other m 2020-07-17T11:28:15.69
IV.FDMO.HHN. ML:0.4 0.000013000000000000001 1.58 AML other m 2020-07-17T11:28:21.92
IV.NRCA.HNE. ML:1.0 0.0002050215 0.128 AML other m 2020-07-17T11:28:15.76
IV.NRCA.HNN. ML:1.2 0.00029228402 0.1472 AML other m 2020-07-17T11:28:15.22
IV.FDMO.HHE. ML:-0.1 0.0000074428445 0.1024 AML other m 2020-07-17T11:28:21.48
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