Earthquake with magnitude of ML 1.2 on date 02-12-2021 and time 23:09:56 (Italy) in region 4 km W Norcia (PG)

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

  • 02-12-2021 22:09:56 (UTC)
  • 02-12-2021 23:09:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.784, 13.04 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 5 4957 4957
Cascia PG 8 3217 8174
Preci PG 11 724 8898
Cerreto di Spoleto PG 11 1075 9973
Poggiodomo PG 12 117 10090
Vallo di Nera PG 15 364 10454
Sellano PG 15 1079 11533
Castelsantangelo sul Nera MC 16 281 11814
Monteleone di Spoleto PG 16 599 12413
Visso MC 17 1107 13520
Sant'Anatolia di Narco PG 18 564 14084
Scheggino PG 19 461 14545
Accumoli RI 20 667 15212
Ussita MC 20 444 15656

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SE of Foligno (57155 inhabitants)
41 Km NE of Terni (111501 inhabitants)
56 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
64 Km SE of Perugia (166134 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
91 Km N of Guidonia Montecelio (88673 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
96 Km W of Montesilvano (53738 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 2021-12-02
22:09:56
42.7838 13.0402 10 2021-12-02
22:34:49
Sala Sismica INGV-Roma 98076031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-02 22:09:56 ± 0.09
Latitude 42.7838 ± 0.0036
Longitude 13.0402 ± 0.0074
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 98076031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 650
Semi-minor axis of confidence ellipse (meter) 87
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) 650
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 156
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) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.07374
Epicentral distance of station farthest from the epicenter (degree) 0.33095
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 16
Type of magnitude ML
Reference to an origin 98076031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-02 22:34:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-12-02T22:10:09.38 0.1 undecidable manual S 21 0.331 50 0.04 96
IV.SMA1.EHZ. 2021-12-02T22:10:07.85 0.1 undecidable manual S 125 0.2653 50 0.44 90
IV.FDMO.HHZ. 2021-12-02T22:10:06.82 0.1 undecidable manual S 8 0.2545 50 -0.28 93
IV.MTRA.HNZ. 2021-12-02T22:10:06.88 0.3 undecidable manual S 96 0.2626 50 -0.45 67
IV.CESI.HHZ. 2021-12-02T22:10:06.65 0.1 undecidable manual S 336 0.2419 50 -0.07 97
IT.MTCL.HGZ. 2021-12-02T22:10:05.61 0.3 undecidable manual S 352 0.2122 113 -0.19 72
IV.FEMA.HNZ. 2021-12-02T22:10:04.58 0.3 undecidable manual S 2 0.1781 117 -0.05 74
IV.MC2.EHZ. 2021-12-02T22:10:04.35 0.1 undecidable manual S 40 0.1682 119 0.08 99
IV.LNSS.HHZ. 2021-12-02T22:10:04.51 0.1 undecidable manual S 180 0.1808 117 -0.21 96
IV.CSP1.EHZ. 2021-12-02T22:10:04.23 0.1 undecidable manual P 21 0.331 50 0.14 94
IV.SMA1.EHZ. 2021-12-02T22:10:03.16 0.1 undecidable manual P 125 0.2653 50 0.19 95
IV.CESI.HHZ. 2021-12-02T22:10:02.66 0.1 negative manual P 336 0.2419 50 0.09 97
IT.MTCL.HGZ. 2021-12-02T22:10:02.06 0.3 undecidable manual P 352 0.2122 113 0.02 74
IV.FDMO.HHZ. 2021-12-02T22:10:02.77 0.1 undecidable manual P 8 0.2545 50 -0.01 98
IV.MTRA.HNZ. 2021-12-02T22:10:02.38 0.3 undecidable manual P 96 0.2626 50 -0.54 65
IV.NRCA.HHZ. 2021-12-02T22:10:01.22 0.1 undecidable manual S 48 0.0737 141 -0.22 97
IV.FEMA.HNZ. 2021-12-02T22:10:01.93 0.3 undecidable manual P 2 0.1781 117 0.57 66
IV.MC2.EHZ. 2021-12-02T22:10:01.33 0.1 undecidable manual P 40 0.1682 119 0.17 97
IV.LNSS.HHZ. 2021-12-02T22:10:01.37 0.1 undecidable manual P 180 0.1808 117 -0.05 99
IV.NRCA.HHZ. 2021-12-02T22:09:59.62 0.1 undecidable manual P 48 0.0737 141 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.0002069087 0.1408 AML other m 2021-12-02T22:10:01.33
IV.NRCA.HHE. ML:1.3 0.0002727731 0.0768 AML other m 2021-12-02T22:10:01.33
IV.NRCA.HNE. ML:1.3 0.000266185 0.1408 AML other m 2021-12-02T22:10:01.41
IV.NRCA.HNN. ML:1.3 0.0002533448 0.1536 AML other m 2021-12-02T22:10:01.41
IV.MC2.EHE. ML:1.2 0.00013796146 0.128 AML other m 2021-12-02T22:10:04.64
IV.MC2.EHN. ML:1.1 0.0001024859 0.1536 AML other m 2021-12-02T22:10:04.63
IV.LNSS.HNE. ML:1.2 0.000111215495 0.1152 AML other m 2021-12-02T22:10:04.81
IV.LNSS.HNN. ML:1.2 0.00012472295915 0.1536 AML other m 2021-12-02T22:10:04.94
IV.LNSS.HHE. ML:1.2 0.0001323554 0.1152 AML other m 2021-12-02T22:10:04.81
IV.LNSS.HHN. ML:1.3 0.0001465335 0.1408 AML other m 2021-12-02T22:10:04.93
IV.CESI.HHE. ML:1 5.0225415E-5 0.4096 AML other m 2021-12-02T22:10:07.00
IV.CESI.HHN. ML:1.3 0.000103943105 0.32 AML other m 2021-12-02T22:10:06.96
IV.FDMO.HHE. ML:1 5.499211E-5 0.256 AML other m 2021-12-02T22:10:06.99
IV.FDMO.HHN. ML:0.9 4.19198E-5 0.1408 AML other m 2021-12-02T22:10:07.14
IV.SMA1.EHE. ML:1 4.96871365E-5 0.4736 AML other m 2021-12-02T22:10:08.31
IV.SMA1.EHN. ML:1 4.35170215E-5 0.1152 AML other m 2021-12-02T22:10:08.54
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