Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 13-10-2020 and time 16:21:47 (UTC) in region 4 km SE Norcia (PG)

A magnitude ML 0.5 earthquake occured in region: 4 km SE Norcia (PG), on

  • 13-10-2020 16:21:47 (UTC)
  • 13-10-2020 18:21:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7630, 13.1170 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 4 4957 4957
Cascia PG 10 3217 8174
Accumoli RI 13 667 8841
Preci PG 14 724 9565
Arquata del Tronto AP 15 1178 10743
Castelsantangelo sul Nera MC 15 281 11024
Poggiodomo PG 16 117 11141
Cittareale RI 16 482 11623
Cerreto di Spoleto PG 18 1075 12698
Monteleone di Spoleto PG 18 599 13297
Visso MC 19 1107 14404
Montegallo AP 20 523 14927

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
96 Km W of Pescara (121014 inhabitants)
98 Km W 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
Bulletin
Rev1000 		ML 0.5 2020-10-13
16:21:47		 42.7627 13.1168 11 2021-02-26
14:56:01		 Bollettino Sismico Italiano INGV 84208121
Reviewed
Rev100 		ML 1.0 2020-10-13
16:21:47		 42.7647 13.103 11 2020-10-13
16:26:08		 Sala Sismica INGV-Roma 83758531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-13 16:21:47 ± 0.06
Latitude 42.7627 ± 0.0027
Longitude 13.1168 ± 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 84208121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 318
Semi-minor axis of confidence ellipse (meter) 131
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 96
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) 48
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43707
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 84208121
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-28 10:29:06

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 83758531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-13 16:26:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VIVA.HHZ. 2020-10-13T16:22:05.37 3.0 undecidable manual P -0.07 0
IV.MOMA.HNZ. 2020-10-13T16:22:02.35 0.6 undecidable manual S 276 44.7219 50 0.33 45
IV.FAGN.HHZ. 2020-10-13T16:22:00.59 3.0 negative manual P 0.4 0
IV.RM33.EHZ. 2020-10-13T16:21:58.01 0.3 undecidable manual S 164 29.2485 50 0.13 72
IV.CESI.HHE. 2020-10-13T16:21:58.43 0.3 undecidable manual S 327 31.9458 50 -0.17 71
IV.FDMO.HHZ. 2020-10-13T16:21:57.97 0.3 undecidable manual S 355 30.4473 50 -0.24 70
IV.ASSB.HHN. 2020-10-13T16:21:56.78 0.3 undecidable manual P 310 48.5181 50 0.28 67
IV.CESX.HHE. 2020-10-13T16:21:56.42 0.3 undecidable manual P 249 46.5201 50 0.22 68
IV.MMO1.HNZ. 2020-10-13T16:21:56.28 0.3 undecidable manual S 48 22.8549 50 0.11 73
IV.MOMA.HNZ. 2020-10-13T16:21:56.24 0.3 undecidable manual P 276 44.7219 50 0.31 67
IV.LNSS.HHZ. 2020-10-13T16:21:55.09 0.6 undecidable manual S 199 18.7701 50 0 50
IV.MTRA.HNZ. 2020-10-13T16:21:55.87 0.6 undecidable manual S 92 22.755 50 -0.29 47
IV.GAVE.EHZ. 2020-10-13T16:21:55.11 0.3 undecidable manual S 247 19.7691 50 -0.24 71
IV.MC2.EHZ. 2020-10-13T16:21:54.99 0.3 undecidable manual S 20 17.4714 50 0.24 72
IV.CESI.HHE. 2020-10-13T16:21:53.63 0.1 undecidable manual P 327 31.9458 50 -0.33 91
IV.RM33.EHZ. 2020-10-13T16:21:53.39 0.1 undecidable manual P 164 29.2485 50 -0.15 95
IV.FDMO.HHZ. 2020-10-13T16:21:53.81 0.3 undecidable manual P 355 30.4473 50 0.08 72
IV.MTRA.HNZ. 2020-10-13T16:21:52.59 0.6 undecidable manual P 92 22.755 50 0.04 49
IV.NRCA.HHZ. 2020-10-13T16:21:52.19 0.3 undecidable manual S 359 7.881 145 -0.13 75
IV.MMO1.HNZ. 2020-10-13T16:21:52.53 0.3 undecidable manual P 48 22.8549 50 -0.03 74
IV.SMA1.EHZ. 2020-10-13T16:21:52.65 0.1 undecidable manual P 129 23.0547 50 0.06 98
IV.T1299.EHZ. 2020-10-13T16:21:52.07 0.3 undecidable manual P 137 19.6692 50 0.01 75
IV.MC2.EHZ. 2020-10-13T16:21:51.82 0.1 undecidable manual P 20 17.4714 50 0.09 99
IV.GAVE.EHZ. 2020-10-13T16:21:51.96 0.1 undecidable manual P 247 19.7691 50 -0.12 98
IV.LNSS.HHZ. 2020-10-13T16:21:51.88 0.1 undecidable manual P 199 18.7701 50 -0.05 99
IV.NRCA.HHZ. 2020-10-13T16:21:50.43 0.1 undecidable manual P 359 7.881 145 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:0.6 0.000022444147000000003 1.0784 AML other m 2020-10-13T16:22:01.14
IV.LNSS.HHN. ML:0.6 0.000033312935 0.1408 AML other m 2020-10-13T16:21:55.59
IV.GAVE.EHE. ML:0.5 0.000032359899999999995 0.1792 AML other m 2020-10-13T16:21:55.80
IV.LNSS.HHE. ML:0.7 0.000043522794999999996 0.1024 AML other m 2020-10-13T16:21:55.93
IV.FDMO.HHN. ML:0.5 0.0000128622925 0.2944 AML other m 2020-10-13T16:21:58.23
IV.FDMO.HHE. ML:0.5 0.0000146536535 0.2304 AML other m 2020-10-13T16:21:58.24
IV.RM33.EHN. ML:0.5 0.000013468803500000002 0.768 AML other m 2020-10-13T16:22:07.14
IV.GAVE.EHN. ML:0.5 0.000022624634999999996 0.128 AML other m 2020-10-13T16:21:55.49
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