Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 0.9 on date 26-11-2021 and time 17:53:32 (Italy) in region 6 km NE Norcia (PG)

A magnitude Md 0.9 earthquake occured in region: 6 km NE Norcia (PG), on

  • 26-11-2021 16:53:32 (UTC)
  • 26-11-2021 17:53:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8320, 13.1460 at 10 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 6 4957 4957
Castelsantangelo sul Nera MC 7 281 5238
Preci PG 10 724 5962
Visso MC 12 1107 7069
Ussita MC 13 444 7513
Arquata del Tronto AP 14 1178 8691
Montegallo AP 15 523 9214
Cascia PG 17 3217 12431
Montemonaco AP 17 604 13035
Accumoli RI 17 667 13702
Cerreto di Spoleto PG 19 1075 14777
Sellano PG 19 1079 15856
Bolognola MC 19 142 15998

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
50 Km W of Teramo (54892 inhabitants)
51 Km NE of Terni (111501 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
69 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
96 Km W of Pescara (121014 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
99 Km NE of Guidonia Montecelio (88673 inhabitants)
99 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
Bulletin
Rev1000 		Md 0.9 2021-11-26
16:53:32		 42.8322 13.146 11 2022-03-30
13:04:20		 Bollettino Sismico Italiano INGV 98234261
Reviewed
Rev100 		ML 0.9 2021-11-26
16:53:32		 42.8212 13.1395 10 2021-11-26
16:58:22		 Sala Sismica INGV-Roma 97830691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-26 16:53:32 ± 0.06
Latitude 42.8322 ± 0.0036
Longitude 13.1460 ± 0.0061
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 98234261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 491
Semi-minor axis of confidence ellipse (meter) 336
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 120
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) 82
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.02338
Epicentral distance of station farthest from the epicenter (degree) 0.27699
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 97830691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-26 16:58:22

Md:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 3
Type of magnitude Md
Reference to an origin 98234261
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-07 10:23:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHN. 2021-11-26T16:53:43.37 0.6 undecidable manual S 56 30.747 50 -0.01 48
IV.CESI.HHZ. 2021-11-26T16:53:42.57 0.3 undecidable manual S 314 27.4503 50 0.09 71
IV.CSP1.EHZ. 2021-11-26T16:53:42.73 0.6 undecidable manual S 9 29.1486 50 -0.23 46
IV.LNSS.HNZ. 2021-11-26T16:53:42.07 0.6 undecidable manual S 199 26.8509 50 -0.26 46
IV.GAVE.EHZ. 2021-11-26T16:53:41.89 0.3 undecidable manual S 233 25.752 50 -0.14 71
IV.FDMO.HHZ. 2021-11-26T16:53:41.26 0.3 undecidable manual S 348 23.1546 50 -0.08 72
IV.MF5.EHN. 2021-11-26T16:53:39.01 0.1 undecidable manual P 56 30.747 50 0.19 93
IV.MMO1.EHZ. 2021-11-26T16:53:39.16 0.3 undecidable manual S 63 16.4724 123 -0.21 71
IV.CSP1.EHZ. 2021-11-26T16:53:38.54 0.3 undecidable manual P 9 29.1486 50 -0.04 72
IV.GUMA.HNN. 2021-11-26T16:53:38.34 0.6 undecidable manual P 31 29.8479 50 -0.33 45
IV.CESI.HHZ. 2021-11-26T16:53:38.37 0.3 undecidable manual P 314 27.4503 50 0.07 72
IV.SMA1.EHN. 2021-11-26T16:53:38.61 0.1 undecidable manual P 145 27.1506 50 0.35 90
IV.GAVE.EHZ. 2021-11-26T16:53:38.37 0.3 undecidable manual P 233 25.752 50 0.33 68
IV.FDMO.HHZ. 2021-11-26T16:53:37.62 0.3 undecidable manual P 348 23.1546 50 -0.02 73
IV.LNSS.HNZ. 2021-11-26T16:53:37.97 0.3 undecidable manual P 199 26.8509 50 -0.25 69
IV.MC2.EHZ. 2021-11-26T16:53:37.73 0.3 undecidable manual S 22 9.4794 138 0.23 72
IV.MMO1.EHZ. 2021-11-26T16:53:36.25 0.3 undecidable manual P 63 16.4724 123 -0.25 70
IV.NRCA.HHZ. 2021-11-26T16:53:36.11 0.3 undecidable manual S 273 2.5974 166 -0.24 72
IV.MC2.EHZ. 2021-11-26T16:53:35.63 0.1 undecidable manual P 22 9.4794 138 0.21 96
IV.NRCA.HHZ. 2021-11-26T16:53:34.82 0.1 undecidable manual P 273 2.5974 166 0.06 100
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