Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 28-11-2020 and time 06:38:46 (Italy) in region 4 km NE Norcia (PG)

A magnitude ML 0.8 earthquake occured in region: 4 km NE Norcia (PG), on

  • 28-11-2020 05:38:46 (UTC)
  • 28-11-2020 06:38:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8260, 13.1220 at 9 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 8 281 5238
Preci PG 9 724 5962
Visso MC 12 1107 7069
Ussita MC 13 444 7513
Cascia PG 15 3217 10730
Arquata del Tronto AP 15 1178 11908
Cerreto di Spoleto PG 17 1075 12983
Sellano PG 17 1079 14062
Montegallo AP 17 523 14585
Accumoli RI 18 667 15252
Montemonaco AP 19 604 15856
Poggiodomo PG 20 117 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
67 Km E of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km W of Pescara (121014 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
Reviewed
Rev100 		ML 0.8 2020-11-28
05:38:46		 42.8255 13.1222 9 2020-11-28
05:59:05		 Sala Sismica INGV-Roma 85061991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-28 05:38:46 ± 0.09
Latitude 42.8255 ± 0.0045
Longitude 13.1222 ± 0.0086
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85061991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 618
Semi-minor axis of confidence ellipse (meter) 480
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 270
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
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) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00989
Epicentral distance of station farthest from the epicenter (degree) 0.40739
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 85061991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-28 05:59:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-11-28T05:39:00.92 0.3 undecidable manual S 120 45.2214 50 -0.48 65
IV.MF5.EHZ. 2020-11-28T05:38:58.84 0.3 undecidable manual S 57 32.8449 50 0.76 60
IV.CSP1.EHZ. 2020-11-28T05:38:57.14 0.3 undecidable manual S 13 30.3474 50 -0.27 70
IV.CESI.HHZ. 2020-11-28T05:38:56.30 0.3 undecidable manual S 318 26.6511 109 0.09 73
IV.LNSS.HHZ. 2020-11-28T05:38:55.81 0.3 undecidable manual S 195 25.5522 110 -0.06 74
IV.TERO.HHZ. 2020-11-28T05:38:55.18 0.3 undecidable manual P 120 45.2214 50 0.1 71
IV.FDMO.HHZ. 2020-11-28T05:38:55.09 0.3 undecidable manual S 353 23.5542 111 -0.13 73
IV.MF5.EHZ. 2020-11-28T05:38:53.33 0.1 undecidable manual P 57 32.8449 50 0.17 95
IV.MMO1.EHZ. 2020-11-28T05:38:53.27 0.3 undecidable manual S 64 18.5703 116 -0.35 70
IV.CSP1.EHZ. 2020-11-28T05:38:52.63 0.1 undecidable manual P 13 30.3474 50 -0.14 96
IV.LNSS.HHZ. 2020-11-28T05:38:52.02 0.1 undecidable manual P 195 25.5522 110 0.13 97
IV.CESI.HHZ. 2020-11-28T05:38:52.15 0.1 undecidable manual P 318 26.6511 109 0.07 98
IV.FDMO.HHZ. 2020-11-28T05:38:51.04 0.1 undecidable manual P 353 23.5542 111 -0.47 90
IV.MC2.EHZ. 2020-11-28T05:38:51.68 0.3 undecidable manual S 30 10.9779 130 0.28 72
IV.MMO1.EHZ. 2020-11-28T05:38:50.52 0.1 undecidable manual P 64 18.5703 116 -0.07 99
IV.NRCA.HHZ. 2020-11-28T05:38:49.47 0.1 undecidable manual S 325 1.0989 173 -0.17 100
IV.MC2.EHZ. 2020-11-28T05:38:49.63 0.1 undecidable manual P 30 10.9779 130 0.32 95
IV.NRCA.HHZ. 2020-11-28T05:38:48.54 0.1 undecidable manual P 325 1.0989 173 0.25 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.9 0.0000421 0.42 AML other m 2020-11-28T05:38:57.83
IV.CESI.HHN. ML:0.7 0.000032 0.88 AML other m 2020-11-28T05:38:57.27
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