Earthquake with magnitude of ML 1.6 on date 27-11-2021 and time 21:30:29 (Italy) in region 4 km N Norcia (PG)

A magnitude ML 1.6 earthquake occured in region: 4 km N Norcia (PG), on

  • 27-11-2021 20:30:29 (UTC)
  • 27-11-2021 21:30:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.828, 13.103 at 10 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.

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
Preci PG 8 724 5681
Castelsantangelo sul Nera MC 9 281 5962
Visso MC 12 1107 7069
Ussita MC 13 444 7513
Cascia PG 14 3217 10730
Cerreto di Spoleto PG 15 1075 11805
Sellano PG 16 1079 12884
Arquata del Tronto AP 17 1178 14062
Poggiodomo PG 19 117 14179
Montegallo AP 19 523 14702
Accumoli RI 19 667 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
58 Km NW of L'Aquila (69753 inhabitants)
66 Km E of Perugia (166134 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km N of Tivoli (56533 inhabitants)
100 Km W of Pescara (121014 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.6 2021-11-27
20:30:29
42.8278 13.1027 10 2021-11-27
20:37:00
Sala Sismica INGV-Roma 97879351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-27 20:30:29 ± 0.05
Latitude 42.8278 ± 0.0027
Longitude 13.1027 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97879351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 329
Semi-minor axis of confidence ellipse (meter) 123
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00989
Epicentral distance of station farthest from the epicenter (degree) 0.42088
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 97879351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-27 20:37:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MF5.EHZ. 2021-11-27T20:30:41.45 0.6 undecidable manual S 58 0.3067 50 0.53 44
IV.RM33.EHZ. 2021-11-27T20:30:41.74 0.6 undecidable manual S 166 0.3292 50 0.15 47
IV.MML1.EHZ. 2021-11-27T20:30:40.72 0.6 undecidable manual S 341 0.3013 50 -0.05 49
IV.GUMA.HHZ. 2021-11-27T20:30:40.77 0.6 undecidable manual S 36 0.2896 50 0.34 46
IV.CSP1.EHZ. 2021-11-27T20:30:39.71 0.6 undecidable manual S 16 0.2743 50 -0.26 47
IV.CESI.HHZ. 2021-11-27T20:30:38.13 0.6 undecidable manual S 321 0.2284 111 -0.47 45
IV.MTRA.EHZ. 2021-11-27T20:30:38.15 0.6 undecidable manual S 108 0.2266 112 -0.39 46
IV.LNSS.HHZ. 2021-11-27T20:30:38.60 0.6 undecidable manual S 192 0.2293 111 -0.03 49
IV.TERO.HHZ. 2021-11-27T20:30:37.63 0.1 undecidable manual P 119 0.4209 50 -0.27 91
IV.FDMO.HHZ. 2021-11-27T20:30:37.64 0.6 undecidable manual S 357 0.2086 113 -0.26 47
IV.GAVE.EHZ. 2021-11-27T20:30:37.85 0.6 undecidable manual S 229 0.2041 114 0.11 49
IV.ASSB.HHZ. 2021-11-27T20:30:37.31 1.0 negative manual P 304 0.3894 50 -0.05 24
IV.RM33.EHZ. 2021-11-27T20:30:36.23 0.6 positive manual P 166 0.3292 50 -0.1 48
IT.MTCL.HGN. 2021-11-27T20:30:36.81 0.6 undecidable manual S 336 0.1826 116 -0.16 49
IV.MMO1.EHZ. 2021-11-27T20:30:36.51 0.6 undecidable manual S 66 0.179 117 -0.35 47
IV.MF5.EHZ. 2021-11-27T20:30:36.17 1.0 negative manual P 58 0.3067 50 0.23 23
IV.CSP1.EHZ. 2021-11-27T20:30:35.27 0.1 undecidable manual P 16 0.2743 50 -0.12 96
IV.MML1.EHZ. 2021-11-27T20:30:35.77 0.6 negative manual P 341 0.3013 50 -0.08 48
IV.GUMA.HHZ. 2021-11-27T20:30:35.87 0.6 positive manual P 36 0.2896 50 0.21 47
IV.SMA1.EHZ. 2021-11-27T20:30:35.09 0.6 undecidable manual P 139 0.2608 50 -0.07 49
IV.MTRA.EHZ. 2021-11-27T20:30:34.45 0.1 undecidable manual P 108 0.2266 112 -0.11 97
IV.LNSS.HHZ. 2021-11-27T20:30:34.58 0.6 negative manual P 192 0.2293 111 -0.04 49
IV.MC2.EHZ. 2021-11-27T20:30:34.68 0.6 undecidable manual S 37 0.1043 131 0.22 49
IV.FDMO.HHZ. 2021-11-27T20:30:34.16 0.1 negative manual P 357 0.2086 113 -0.04 99
IV.CESI.HHZ. 2021-11-27T20:30:34.65 0.1 undecidable manual P 321 0.2284 111 0.04 99
IV.GAVE.EHZ. 2021-11-27T20:30:34.42 1.0 positive manual P 229 0.2041 114 0.32 23
IV.MMO1.EHZ. 2021-11-27T20:30:33.57 0.1 undecidable manual P 66 0.179 117 -0.03 100
IT.MTCL.HGN. 2021-11-27T20:30:33.68 0.1 undecidable manual P 336 0.1826 116 0.02 100
IV.FEMA.HNN. 2021-11-27T20:30:33.13 0.6 undecidable manual P 344 0.1394 123 0.3 48
IV.NRCA.HNZ. 2021-11-27T20:30:32.59 0.6 undecidable manual S 56 0.0099 173 -0.03 52
IV.MC2.EHZ. 2021-11-27T20:30:32.57 0.1 positive manual P 37 0.1043 131 0.36 94
IV.NRCA.HNZ. 2021-11-27T20:30:31.48 0.3 undecidable manual P 56 0.0099 173 0.33 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:2 0.00184 0.12 AML other m 2021-11-27T20:30:32.79
IV.NRCA.HNE. ML:1.9 0.001685 0.12 AML other m 2021-11-27T20:30:32.79
IV.NRCA.HHN. ML:1.9 0.0015 0.14 AML other m 2021-11-27T20:30:32.80
IV.NRCA.HNN. ML:1.9 0.00152 0.12 AML other m 2021-11-27T20:30:32.80
IV.MC2.EHN. ML:1.9 0.0008545 0.82 AML other m 2021-11-27T20:30:35.54
IV.MC2.EHE. ML:1.8 0.0007415 0.32 AML other m 2021-11-27T20:30:36.14
IV.MMO1.EHE. ML:1.3 0.000138 1.28 AML other m 2021-11-27T20:30:36.89
IV.MMO1.EHN. ML:1.5 0.0002235 0.68 AML other m 2021-11-27T20:30:37.88
IV.FDMO.HHE. ML:1.3 0.0001165 0.26 AML other m 2021-11-27T20:30:37.96
IV.FDMO.HHN. ML:1.2 0.000108 0.98 AML other m 2021-11-27T20:30:37.84
IV.GAVE.EHN. ML:1.7 0.0003065 0.3 AML other m 2021-11-27T20:30:38.09
IV.MTRA.EHN. ML:1.6 0.000216 1.18 AML other m 2021-11-27T20:30:38.99
IV.CESI.HHE. ML:1.5 0.000172 0.18 AML other m 2021-11-27T20:30:38.79
IV.CESI.HHN. ML:1.7 0.0002675 0.24 AML other m 2021-11-27T20:30:38.93
IV.GAVE.EHE. ML:1.7 0.0003485 1.8 AML other m 2021-11-27T20:30:38.02
IV.LNSS.HHE. ML:1.5 0.000177 1.32 AML other m 2021-11-27T20:30:39.80
IV.LNSS.HHN. ML:1.6 0.0002045 0.26 AML other m 2021-11-27T20:30:39.20
IV.MTRA.EHE. ML:1.6 0.0002615 0.16 AML other m 2021-11-27T20:30:39.23
IV.GUMA.HHE. ML:1.7 0.0002065 0.18 AML other m 2021-11-27T20:30:40.84
IV.GUMA.HHN. ML:1.6 0.000165 1.02 AML other m 2021-11-27T20:30:41.29
IV.ASSB.HHE. ML:1.4 8.51E-5 0.18 AML other m 2021-11-27T20:30:44.02
IV.ASSB.HHN. ML:1.4 7.18E-5 0.64 AML other m 2021-11-27T20:30:45.32
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