Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 25-07-2020 and time 17:53:18 (Italy) in region 4 km E Norcia (PG)

A magnitude ML 1.3 earthquake occured in region: 4 km E Norcia (PG), on

  • 25-07-2020 15:53:18 (UTC)
  • 25-07-2020 17:53:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7990, 13.1390 at 12 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
Castelsantangelo sul Nera MC 11 281 5238
Preci PG 12 724 5962
Arquata del Tronto AP 13 1178 7140
Cascia PG 14 3217 10357
Accumoli RI 15 667 11024
Visso MC 15 1107 12131
Ussita MC 16 444 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Montemonaco AP 19 604 14777
Poggiodomo PG 19 117 14894

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km W of Pescara (121014 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 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 1.3 2020-07-25
15:53:18		 42.7988 13.1392 12 2020-07-25
16:00:17		 Sala Sismica INGV-Roma 81337151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-25 15:53:18 ± 0.06
Latitude 42.7988 ± 0.0027
Longitude 13.1392 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81337151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 363
Semi-minor axis of confidence ellipse (meter) 175
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
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) 132
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 13
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38401
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 81337151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-25 16:00:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.GBOS.HHZ. 2020-07-25T15:55:17.61 3.0 undecidable manual Sn 0.61 0
IV.CAPR.HNZ. 2020-07-25T15:55:13.20 3.0 undecidable manual Sg 8.73 0
IV.MILN.HNZ. 2020-07-25T15:55:13.33 3.0 undecidable manual Sn 2.92 0
IV.QLNO.HHZ. 2020-07-25T15:55:12.91 3.0 undecidable manual Sn 3.66 0
IV.CADC.HNZ. 2020-07-25T15:55:07.41 3.0 undecidable manual Sg 8.48 0
IV.CMPR.HHZ. 2020-07-25T15:54:53.12 3.0 undecidable manual Sg 6.15 0
IV.PANTE.HHZ. 2020-07-25T15:54:51.63 3.0 negative manual Pn -1.09 0
MN.TRI.HHZ. 2020-07-25T15:54:48.61 3.0 undecidable manual Sg 3.56 0
IV.HVZN.HNZ. 2020-07-25T15:54:46.77 3.0 undecidable manual Pn -1.3 0
IV.EVRN.HNZ. 2020-07-25T15:54:44.49 3.0 negative manual Pn 2.23 0
GU.RRL.HHZ. 2020-07-25T15:54:43.10 3.0 undecidable manual Pn 4 0
MN.TUE.HHZ. 2020-07-25T15:54:37.43 3.0 undecidable manual Pg 5.85 0
IV.MCRV.HHZ. 2020-07-25T15:54:37.36 3.0 undecidable manual Sg 1.32 0
GU.MGRO.HHZ. 2020-07-25T15:54:29.33 3.0 undecidable manual Pn 3.54 0
GU.RORO.HHZ. 2020-07-25T15:54:25.37 3.0 positive manual Pn 1.78 0
CR.ZAG.BHZ. 2020-07-25T15:54:22.64 3.0 undecidable manual Pg 5.03 0
ST.RONC.EHZ. 2020-07-25T15:54:17.79 3.0 positive manual Pn -1.19 0
IV.NOCI.HHZ. 2020-07-25T15:54:16.08 3.0 undecidable manual Pn -0.87 0
IV.SFI.EHZ. 2020-07-25T15:54:05.71 3.0 undecidable manual S -5.11 0
IV.CRE.HHZ. 2020-07-25T15:53:42.54 3.0 undecidable manual P -3.14 0
IV.ROSPO.HHZ. 2020-07-25T15:53:42.36 3.0 undecidable manual P -5.31 0
IV.ATCC.EHZ. 2020-07-25T15:53:41.71 3.0 undecidable manual S -1.96 0
IV.EL6.EHZ. 2020-07-25T15:53:37.46 3.0 undecidable manual S -3.19 0
IV.TERO.HHZ. 2020-07-25T15:53:31.77 0.3 undecidable manual S 117 42.624 91 -0.07 72
IV.FDMO.HHZ. 2020-07-25T15:53:27.47 0.3 undecidable manual S 351 26.6511 92 -0.12 72
IV.TERO.HHZ. 2020-07-25T15:53:26.07 0.6 undecidable manual P 117 42.624 91 0.08 47
IV.LNSS.HHZ. 2020-07-25T15:53:26.73 0.6 undecidable manual S 200 23.1546 92 0.07 48
IV.MMO1.EHZ. 2020-07-25T15:53:25.28 0.6 undecidable manual S 54 18.87 94 -0.23 48
IV.MC2.EHZ. 2020-07-25T15:53:24.33 0.6 undecidable manual S 18 13.0758 108 0.34 47
IV.CSP1.EHZ. 2020-07-25T15:53:24.52 0.3 negative manual P 9 32.9448 91 0.02 73
IV.LNSS.HHZ. 2020-07-25T15:53:23.11 0.6 undecidable manual P 200 23.1546 92 0.11 48
IV.FDMO.HHZ. 2020-07-25T15:53:23.46 0.1 positive manual P 351 26.6511 92 -0.08 98
IV.MMO1.EHZ. 2020-07-25T15:53:22.34 0.1 positive manual P 54 18.87 94 0 100
IV.NRCA.HHZ. 2020-07-25T15:53:22.17 0.6 undecidable manual S 332 4.3956 153 -0.06 51
IV.MC2.EHZ. 2020-07-25T15:53:21.67 1.0 undecidable manual P 18 13.0758 108 0.21 24
IV.NRCA.HHZ. 2020-07-25T15:53:20.57 0.6 undecidable manual P 332 4.3956 153 0.12 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.0004685 0.1 AML other m 2020-07-25T15:53:22.85
IV.NRCA.HHE. ML:1.5 0.0005455 1.48 AML other m 2020-07-25T15:53:23.11
IV.LNSS.HHN. ML:1.3 0.00011499999999999999 0.44 AML other m 2020-07-25T15:53:27.67
IV.LNSS.HHE. ML:1.2 0.00009934999999999999 1 AML other m 2020-07-25T15:53:28.20
IV.FDMO.HHN. ML:0.8 0.00003105 1.28 AML other m 2020-07-25T15:53:28.00
IV.FDMO.HHE. ML:0.8 0.000029500000000000002 0.82 AML other m 2020-07-25T15:53:29.46
IV.ATCC.EHN. ML:1.4 0.0000569 0.56 AML other m 2020-07-25T15:53:51.23
IV.ATCC.EHE. ML:1.5 0.000059399999999999994 1 AML other m 2020-07-25T15:54:01.65
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