Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 26-11-2020 and time 16:11:57 (UTC) in region 4 km SE Norcia (PG)

A magnitude ML 0.7 earthquake occured in region: 4 km SE Norcia (PG), on

  • 26-11-2020 16:11:57 (UTC)
  • 26-11-2020 17:11:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7550, 13.1120 at 11 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 5 4957 4957
Cascia PG 9 3217 8174
Accumoli RI 13 667 8841
Preci PG 15 724 9565
Poggiodomo PG 15 117 9682
Arquata del Tronto AP 15 1178 10860
Cittareale RI 16 482 11342
Castelsantangelo sul Nera MC 16 281 11623
Monteleone di Spoleto PG 17 599 12222
Cerreto di Spoleto PG 18 1075 13297
Visso MC 20 1107 14404

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
50 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)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
96 Km W of Pescara (121014 inhabitants)
97 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
Reviewed
Rev100 		ML 0.7 2020-11-26
16:11:57		 42.7553 13.1122 11 2020-11-26
16:30:39		 Sala Sismica INGV-Roma 85033701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-26 16:11:57 ± 0.1
Latitude 42.7553 ± 0.0045
Longitude 13.1122 ± 0.0135
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85033701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1146
Semi-minor axis of confidence ellipse (meter) 388
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 282
Circular confidence region, given by single value of horizontal uncertainty (meter) 1150.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.07824
Epicentral distance of station farthest from the epicenter (degree) 0.34264
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 85033701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-26 16:30:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-11-26T16:12:10.31 0.6 undecidable manual S 11 38.0286 50 0.24 48
IV.MMO1.EHZ. 2020-11-26T16:12:06.32 0.3 undecidable manual S 47 23.6541 50 0.1 75
IV.MC2.EHZ. 2020-11-26T16:12:05.16 0.3 undecidable manual S 20 18.3705 50 0.34 70
IV.CSP1.EHZ. 2020-11-26T16:12:04.72 0.3 undecidable manual P 11 38.0286 50 -0.01 73
IV.LNSS.HHZ. 2020-11-26T16:12:04.96 0.3 undecidable manual S 199 17.871 50 0.27 71
IV.CESI.HHE. 2020-11-26T16:12:04.04 0.6 undecidable manual P 329 32.4453 50 0.18 49
IV.FDMO.HHZ. 2020-11-26T16:12:03.04 0.3 undecidable manual P 356 31.2465 50 -0.64 62
IV.NRCA.HHZ. 2020-11-26T16:12:02.06 0.3 undecidable manual S 1 8.6802 142 -0.25 77
IV.MMO1.EHZ. 2020-11-26T16:12:02.58 0.3 undecidable manual P 47 23.6541 50 0.07 75
IV.MC2.EHZ. 2020-11-26T16:12:01.79 0.3 undecidable manual P 20 18.3705 50 0.09 74
IV.LNSS.HHZ. 2020-11-26T16:12:01.70 0.3 undecidable manual P 199 17.871 50 0.07 75
IV.T1299.HNE. 2020-11-26T16:12:01.62 0.3 undecidable manual P 134 19.2696 50 -0.22 75
IV.NRCA.HHZ. 2020-11-26T16:12:00.32 0.1 undecidable manual P 1 8.6802 142 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.8 0.000073 0.08 AML other m 2020-11-26T16:12:02.22
IV.NRCA.HHE. ML:1.1 0.000174 0.16 AML other m 2020-11-26T16:12:02.22
IV.LNSS.HHE. ML:0.5 0.000026799999999999998 0.14 AML other m 2020-11-26T16:12:05.44
IV.LNSS.HHN. ML:0.6 0.000034149999999999997 0.76 AML other m 2020-11-26T16:12:05.66
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