Earthquake with magnitude of ML 1.2 on date 18-11-2021 and time 21:23:37 (Italy) in region 4 km E Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km E Norcia (PG), on

  • 18-11-2021 20:23:37 (UTC)
  • 18-11-2021 21:23:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.794, 13.142 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
Castelsantangelo sul Nera MC 11 281 5238
Preci PG 13 724 5962
Arquata del Tronto AP 13 1178 7140
Cascia PG 13 3217 10357
Accumoli RI 14 667 11024
Visso MC 16 1107 12131
Montegallo AP 17 523 12654
Ussita MC 17 444 13098
Cerreto di Spoleto PG 19 1075 14173
Poggiodomo PG 19 117 14290
Montemonaco AP 19 604 14894
Cittareale RI 20 482 15376

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
48 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 Km W of Pescara (121014 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
97 Km NW of Chieti (51815 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 1.2 2021-11-18
20:23:37
42.7942 13.1422 10 2021-11-18
20:31:53
Sala Sismica INGV-Roma 97566771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-18 20:23:37 ± 0.05
Latitude 42.7942 ± 0.0027
Longitude 13.1422 ± 0.0049
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 97566771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 315
Semi-minor axis of confidence ellipse (meter) 290
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 245
Circular confidence region, given by single value of horizontal uncertainty (meter) 310
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.12231
Epicentral distance of station farthest from the epicenter (degree) 0.536
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 97566771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-18 20:31:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-11-18T20:23:56.67 0.3 undecidable manual S 357 0.536 50 0.6 61
IV.MF5.EHZ. 2021-11-18T20:23:50.02 0.6 undecidable manual S 50 0.3022 50 0.86 38
IV.MML1.EHZ. 2021-11-18T20:23:50.36 0.6 undecidable manual S 339 0.3426 50 0 49
IV.CSP1.EHZ. 2021-11-18T20:23:48.83 0.6 undecidable manual S 9 0.3013 50 -0.3 46
IV.RM33.EHZ. 2021-11-18T20:23:48.74 0.3 undecidable manual S 169 0.2896 50 -0.05 73
IV.EL6.EHZ. 2021-11-18T20:23:48.15 0.1 undecidable manual P 357 0.536 50 -0.06 93
IV.CESI.HHZ. 2021-11-18T20:23:48.13 0.3 undecidable manual S 321 0.2734 50 -0.17 72
IV.FDMO.HHZ. 2021-11-18T20:23:47.04 0.6 undecidable manual S 351 0.2455 50 -0.44 45
IV.LNSS.HHZ. 2021-11-18T20:23:46.22 0.6 undecidable manual S 201 0.205 113 0.15 49
IV.SMA1.EHZ. 2021-11-18T20:23:46.34 0.6 undecidable manual S 139 0.2167 112 -0.12 49
IV.GAVE.HNZ. 2021-11-18T20:23:46.41 0.3 undecidable manual S 241 0.2086 113 0.22 72
IT.MTCL.HGE. 2021-11-18T20:23:46.54 0.6 undecidable manual S 332 0.2257 111 -0.24 48
IV.MTRA.HNE. 2021-11-18T20:23:45.12 0.6 undecidable manual S 101 0.1907 115 -0.42 46
IV.MML1.EHZ. 2021-11-18T20:23:44.93 0.1 undecidable manual P 339 0.3426 50 0.02 97
IV.CSP1.EHZ. 2021-11-18T20:23:44.06 0.1 undecidable manual P 9 0.3013 50 -0.13 96
IV.MMO1.EHZ. 2021-11-18T20:23:44.85 0.6 undecidable manual S 52 0.1718 117 -0.03 50
IV.MF5.EHZ. 2021-11-18T20:23:44.53 0.6 negative manual P 50 0.3022 50 0.31 46
IV.CESI.HHZ. 2021-11-18T20:23:43.67 0.6 positive manual P 321 0.2734 50 -0.05 49
IV.MC2.EHZ. 2021-11-18T20:23:43.60 0.6 undecidable manual S 16 0.1223 126 0.34 48
IV.RM33.EHZ. 2021-11-18T20:23:43.96 0.6 positive manual P 169 0.2896 50 -0.04 49
IV.FDMO.HHZ. 2021-11-18T20:23:43.03 0.3 positive manual P 351 0.2455 50 -0.21 71
IT.MTCL.HGE. 2021-11-18T20:23:42.65 0.1 undecidable manual P 332 0.2257 111 -0.19 96
IV.LNSS.HHZ. 2021-11-18T20:23:42.47 0.1 undecidable manual P 201 0.205 113 0.04 99
IV.SMA1.EHZ. 2021-11-18T20:23:42.73 1.0 undecidable manual P 139 0.2167 112 0.07 25
IV.GAVE.HNZ. 2021-11-18T20:23:42.51 0.1 undecidable manual P 241 0.2086 113 0.01 100
IV.MTRA.HNE. 2021-11-18T20:23:42.02 0.1 undecidable manual P 101 0.1907 115 -0.1 99
IV.MMO1.EHZ. 2021-11-18T20:23:41.69 0.1 undecidable manual P 52 0.1718 117 -0.06 100
IV.MC2.EHZ. 2021-11-18T20:23:41.07 0.1 positive manual P 16 0.1223 126 0.26 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMO1.EHN. ML:1.2 0.00013165 0.2 AML other m 2021-11-18T20:23:45.11
IV.MMO1.EHE. ML:1.2 0.000124 0.56 AML other m 2021-11-18T20:23:46.07
IV.LNSS.HHN. ML:1.6 0.0002645 0.18 AML other m 2021-11-18T20:23:46.55
IV.LNSS.HHE. ML:1.6 0.000256 0.28 AML other m 2021-11-18T20:23:46.41
IV.CESI.HHN. ML:1.2 7.975E-5 0.32 AML other m 2021-11-18T20:23:48.71
IV.CESI.HHE. ML:1.1 5.42E-5 1.18 AML other m 2021-11-18T20:23:48.63
IV.MML1.EHE. ML:1.3 8.165E-5 0.78 AML other m 2021-11-18T20:23:50.97
IV.MML1.EHN. ML:1.2 5.465E-5 0.16 AML other m 2021-11-18T20:23:50.87
IV.MC2.EHE. ML:1.4 0.00024378795 0.2688 AML other m 2021-11-18T20:23:44.35
IV.MC2.EHN. ML:1.4 0.0002785798 0.2304 AML other m 2021-11-18T20:23:44.88
IV.SMA1.EHE. ML:1.1 8.051057E-5 0.4224 AML other m 2021-11-18T20:23:49.93
IV.SMA1.EHN. ML:1 6.163584E-5 0.7168 AML other m 2021-11-18T20:23:50.48
IV.FDMO.HHE. ML:1 4.8703005E-5 0.1792 AML other m 2021-11-18T20:23:47.78
IV.FDMO.HHN. ML:0.9 4.417771E-5 0.1408 AML other m 2021-11-18T20:23:47.45
IV.RM33.EHE. ML:0.9 3.6780915E-5 0.1152 AML other m 2021-11-18T20:23:49.72
IV.RM33.EHN. ML:0.9 3.3872428E-5 0.9216 AML other m 2021-11-18T20:23:49.54
IV.CSP1.EHE. ML:1.4 0.00011930934 0.3968 AML other m 2021-11-18T20:23:49.55
IV.CSP1.EHN. ML:1.4 9.690185E-5 0.2176 AML other m 2021-11-18T20:23:50.59
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