Earthquake with magnitude of ML 1.2 on date 24-10-2021 and time 14:39:20 (Italy) in region 1 km S Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 1 km S Norcia (PG), on

  • 24-10-2021 12:39:20 (UTC)
  • 24-10-2021 14:39:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.788, 13.093 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.

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 1 4957 4957
Cascia PG 10 3217 8174
Preci PG 11 724 8898
Castelsantangelo sul Nera MC 13 281 9179
Cerreto di Spoleto PG 15 1075 10254
Poggiodomo PG 15 117 10371
Visso MC 16 1107 11478
Accumoli RI 16 667 12145
Arquata del Tronto AP 17 1178 13323
Sellano PG 18 1079 14402
Ussita MC 18 444 14846
Vallo di Nera PG 19 364 15210
Monteleone di Spoleto PG 19 599 15809
Cittareale RI 20 482 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
99 Km W of Pescara (121014 inhabitants)
99 Km SW of Ancona (100861 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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.2 2021-10-24
12:39:20
42.7877 13.0932 11 2021-10-24
12:45:26
Sala Sismica INGV-Roma 96949961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-24 12:39:20 ± 0.05
Latitude 42.7877 ± 0.0018
Longitude 13.0932 ± 0.0025
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96949961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 210
Semi-minor axis of confidence ellipse (meter) 140
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 313
Circular confidence region, given by single value of horizontal uncertainty (meter) 210
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.33725
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 96949961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-24 12:45:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2021-10-24T12:39:58.30 3.0 undecidable manual S -0.73 0
IV.EL6.EHZ. 2021-10-24T12:39:40.13 3.0 undecidable manual S 0.73 0
IV.MF5.EHZ. 2021-10-24T12:39:32.36 0.3 undecidable manual S 53 0.3345 90 -0.09 72
IV.CSP1.EHZ. 2021-10-24T12:39:31.90 0.3 undecidable manual S 15 0.3148 90 0.05 72
IV.RM33.EHZ. 2021-10-24T12:39:30.95 0.3 undecidable manual S 162 0.2923 90 -0.24 70
IV.FDMO.HHZ. 2021-10-24T12:39:29.84 0.3 undecidable manual S 359 0.2491 90 -0.06 72
IV.SMA1.EHZ. 2021-10-24T12:39:29.56 0.3 undecidable manual S 131 0.2374 90 0 73
IV.CESI.HHZ. 2021-10-24T12:39:29.85 0.3 undecidable manual S 328 0.2572 90 -0.3 68
IV.TERO.HHZ. 2021-10-24T12:39:28.22 3.0 undecidable manual P -0.37 0
IV.MTRA.EHZ. 2021-10-24T12:39:28.81 0.3 undecidable manual S 98 0.2248 90 -0.38 69
IV.MC2.EHZ. 2021-10-24T12:39:27.00 0.3 undecidable manual S 30 0.1421 90 0.26 71
IV.GAVE.EHZ. 2021-10-24T12:39:27.97 0.3 undecidable manual S 237 0.1745 90 0.27 71
IV.MF5.EHZ. 2021-10-24T12:39:27.72 1.0 positive manual P 53 0.3345 90 0.5 21
IV.LNSS.HHZ. 2021-10-24T12:39:27.79 0.6 undecidable manual S 192 0.1889 90 -0.33 47
IV.MML1.EHZ. 2021-10-24T12:39:27.19 1.0 undecidable manual P 345 0.3372 90 -0.07 24
IV.RM33.EHZ. 2021-10-24T12:39:26.62 0.6 undecidable manual P 162 0.2923 90 0.13 47
IV.CSP1.EHZ. 2021-10-24T12:39:26.83 0.6 negative manual P 15 0.3148 90 -0.05 48
IV.CESI.HHZ. 2021-10-24T12:39:25.95 0.3 negative manual P 328 0.2572 90 0.06 73
IV.MTRA.EHZ. 2021-10-24T12:39:25.32 1.0 undecidable manual P 98 0.2248 90 -0.01 25
IV.FDMO.HHZ. 2021-10-24T12:39:25.77 0.6 positive manual P 359 0.2491 90 0.03 49
IV.SMA1.EHZ. 2021-10-24T12:39:25.84 0.6 negative manual P 131 0.2374 90 0.29 46
IV.LNSS.HHZ. 2021-10-24T12:39:24.63 0.1 positive manual P 192 0.1889 90 -0.09 98
IV.MC2.EHZ. 2021-10-24T12:39:24.06 0.1 undecidable manual P 30 0.1421 90 0.14 97
IV.GAVE.EHZ. 2021-10-24T12:39:24.50 0.3 positive manual P 237 0.1745 90 0.03 74
IV.NRCA.HHZ. 2021-10-24T12:39:24.21 0.6 undecidable manual S 19 0.0486 146 -0.13 50
IV.NRCA.HHZ. 2021-10-24T12:39:22.63 0.1 undecidable manual P 19 0.0486 146 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.5 0.0002345 0.48 AML other m 2021-10-24T12:39:28.27
IV.GAVE.EHE. ML:1.4 0.000172 1.1 AML other m 2021-10-24T12:39:28.31
IV.LNSS.HHN. ML:1.5 0.0002085 0.58 AML other m 2021-10-24T12:39:28.68
IV.GAVE.EHN. ML:1.3 0.00015 1.48 AML other m 2021-10-24T12:39:29.07
IV.MTRA.EHE. ML:1.4 0.0001325 0.1 AML other m 2021-10-24T12:39:29.77
IV.MTRA.EHN. ML:1.1 7.835E-5 0.36 AML other m 2021-10-24T12:39:29.97
IV.FDMO.HHE. ML:1 5.455E-5 0.22 AML other m 2021-10-24T12:39:30.06
IV.FDMO.HHN. ML:1.1 5.865E-5 0.92 AML other m 2021-10-24T12:39:30.53
IV.CESI.HHE. ML:1.1 6.4E-5 0.48 AML other m 2021-10-24T12:39:30.30
IV.CESI.HHN. ML:1.3 0.00010215 0.28 AML other m 2021-10-24T12:39:30.55
IV.SMA1.EHE. ML:1 6.23E-5 1.24 AML other m 2021-10-24T12:39:32.28
IV.SMA1.EHN. ML:1.1 7.425E-5 0.36 AML other m 2021-10-24T12:39:34.31
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