Earthquake with magnitude of ML 1.3 on date 27-10-2021 and time 17:05:20 (UTC) in region 2 km NE Norcia (PG)

A magnitude ML 1.3 earthquake occured in region: 2 km NE Norcia (PG), on

  • 27-10-2021 17:05:20 (UTC)
  • 27-10-2021 19:05:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.805, 13.109 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 2 4957 4957
Preci PG 10 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cascia PG 12 3217 9179
Visso MC 14 1107 10286
Cerreto di Spoleto PG 16 1075 11361
Ussita MC 16 444 11805
Arquata del Tronto AP 16 1178 12983
Accumoli RI 17 667 13650
Sellano PG 18 1079 14729
Poggiodomo PG 18 117 14846
Montegallo AP 19 523 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 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 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 1.3 2021-10-27
17:05:20
42.8048 13.1092 11 2021-10-27
17:11:22
Sala Sismica INGV-Roma 97026741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-27 17:05:20 ± 0.06
Latitude 42.8048 ± 0.0045
Longitude 13.1092 ± 0.0074
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97026741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 634
Semi-minor axis of confidence ellipse (meter) 467
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 51
Circular confidence region, given by single value of horizontal uncertainty (meter) 630
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 14
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) 0.30577
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 97026741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-27 17:11:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2021-10-27T17:05:29.64 3.0 positive manual P 0.27 0
IV.TERO.HHZ. 2021-10-27T17:05:29.14 3.0 undecidable manual P -0.41 0
IV.MMO1.EHZ. 2021-10-27T17:05:28.56 0.6 undecidable manual S 59 0.1853 117 -0.2 47
IV.MF5.EHZ. 2021-10-27T17:05:28.00 3.0 negative manual P 0.24 0
IV.MML1.EHZ. 2021-10-27T17:05:27.80 3.0 undecidable manual P -0.12 0
IV.MC2.EHZ. 2021-10-27T17:05:27.07 0.6 undecidable manual S 29 0.1214 128 0.39 46
IV.CSP1.EHZ. 2021-10-27T17:05:27.19 3.0 positive manual P -0.17 0
IV.GUMA.HHZ. 2021-10-27T17:05:27.71 3.0 undecidable manual P 0.14 0
IV.RM33.EHZ. 2021-10-27T17:05:27.44 0.3 undecidable manual P 165 0.3058 50 -0.04 72
IV.FEMA.HNE. 2021-10-27T17:05:27.85 0.6 undecidable manual S 345 0.1628 120 -0.16 48
IV.MTRA.EHZ. 2021-10-27T17:05:26.10 3.0 positive manual P 0.1 0
IV.T1299.EHN. 2021-10-27T17:05:26.07 0.3 undecidable manual P 143 0.2122 50 0.18 71
IV.FDMO.HHZ. 2021-10-27T17:05:26.09 3.0 positive manual P -0.11 0
IV.SMA1.EHZ. 2021-10-27T17:05:26.20 0.6 undecidable manual P 136 0.241 50 -0.17 47
IV.CESI.HHZ. 2021-10-27T17:05:26.52 0.3 undecidable manual P 323 0.25 50 -0.01 73
IV.GAVE.EHZ. 2021-10-27T17:05:25.71 3.0 positive manual P 0.04 0
IV.FEMA.HNE. 2021-10-27T17:05:25.04 0.6 undecidable manual P 345 0.1628 120 0.1 49
IT.MTCL.HGE. 2021-10-27T17:05:25.66 0.3 undecidable manual P 337 0.205 50 -0.1 72
IV.LNSS.HHZ. 2021-10-27T17:05:25.83 0.3 undecidable manual P 194 0.2077 50 0.02 74
IV.MMO1.EHZ. 2021-10-27T17:05:25.19 0.3 positive manual P 59 0.1853 117 -0.19 71
IV.NRCA.HNZ. 2021-10-27T17:05:24.26 0.6 undecidable manual S 7 0.0288 163 -0.29 48
IV.MC2.EHZ. 2021-10-27T17:05:24.34 0.1 positive manual P 29 0.1214 128 0.17 97
IV.NRCA.HNZ. 2021-10-27T17:05:23.04 0.1 negative manual P 7 0.0288 163 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.8 0.0010787244 0.0768 AML other m 2021-10-27T17:05:24.36
IV.NRCA.HHN. ML:1.6 0.00068928205 0.1408 AML other m 2021-10-27T17:05:24.86
IV.GAVE.EHN. ML:1.1 7.83464E-5 0.1152 AML other m 2021-10-27T17:05:30.11
IV.LNSS.HHN. ML:1.2 0.0001057062 0.2304 AML other m 2021-10-27T17:05:31.25
IV.FDMO.HHE. ML:0.8 3.4948245E-5 0.1024 AML other m 2021-10-27T17:05:30.12
IV.LNSS.HHE. ML:1.3 0.000120553675 0.128 AML other m 2021-10-27T17:05:30.47
IV.FDMO.HHN. ML:0.8 4.1277545E-5 0.0896 AML other m 2021-10-27T17:05:30.24
IV.MTRA.EHE. ML:1 6.182683E-5 0.0896 AML other m 2021-10-27T17:05:30.68
IV.GAVE.EHE. ML:1.1 9.0964225E-5 0.1792 AML other m 2021-10-27T17:05:30.98
IV.MTRA.EHN. ML:1 5.835E-5 0.36 AML other m 2021-10-27T17:05:33.59
IV.GUMA.HHN. ML:1.5 0.00012245581 0.0768 AML other m 2021-10-27T17:05:42.57
IV.GUMA.HHE. ML:1.5 0.00013755775 0.0768 AML other m 2021-10-27T17:05:42.85
IV.NRCA.HNE. ML:1.7 0.00099386635 0.0768 AML other m 2021-10-27T17:05:24.37
IV.NRCA.HNN. ML:1.6 0.00063221055 0.0768 AML other m 2021-10-27T17:05:24.34
IV.GAVE.HNN. ML:1.6 0.0003070092 0.7936 AML other m 2021-10-27T17:05:29.29
IV.LNSS.HNE. ML:1.4 0.00014909731 0.1408 AML other m 2021-10-27T17:05:30.41
IV.MTRA.HNE. ML:1.3 0.00011230249 0.4608 AML other m 2021-10-27T17:05:36.58
IV.MTRA.HNN. ML:1.3 0.000111243535 0.6912 AML other m 2021-10-27T17:05:36.19
IV.CESI.HNE. ML:1.3 0.00010336465 0.5888 AML other m 2021-10-27T17:05:41.48
IV.CESI.HNN. ML:1.5 0.000169100245 0.8064 AML other m 2021-10-27T17:05:38.12
IV.CESI.HHE. ML:0.7 2.567119E-5 0.1408 AML other m 2021-10-27T17:05:31.44
IV.CESI.HHN. ML:0.8 3.717396E-5 0.1024 AML other m 2021-10-27T17:05:31.70
IV.CSP1.EHE. ML:1.2 6.4457415E-5 0.6656 AML other m 2021-10-27T17:05:38.83
IV.CSP1.EHN. ML:1.2 6.5284835E-5 0.1664 AML other m 2021-10-27T17:05:33.11
IV.RM33.EHE. ML:0.8 2.515893E-5 0.1408 AML other m 2021-10-27T17:05:33.68
IV.RM33.EHN. ML:0.8 2.4967757E-5 0.1024 AML other m 2021-10-27T17:05:33.23
IV.RM33.HNE. ML:1.3 8.49730355E-5 0.5504 AML other m 2021-10-27T17:05:35.06
IV.RM33.HNN. ML:1.5 0.00013905765 0.6528 AML other m 2021-10-27T17:05:36.24
IV.GUMA.HNE. ML:1.7 0.00021439565 0.064 AML other m 2021-10-27T17:05:42.80
IV.GUMA.HNN. ML:1.7 0.0002071248 0.7552 AML other m 2021-10-27T17:05:34.18
IV.MML1.EHE. ML:0.7 1.8645371E-5 0.1152 AML other m 2021-10-27T17:05:33.82
IV.MML1.EHN. ML:0.8 2.582182E-5 1.3824 AML other m 2021-10-27T17:05:43.28
IV.MML1.HNE. ML:1.4 0.00010952143 0.8448 AML other m 2021-10-27T17:05:43.01
IV.MML1.HNN. ML:1.3 8.707936E-5 0.5248 AML other m 2021-10-27T17:05:39.96
IV.MF5.EHE. ML:1.3 7.6597505E-5 1.984 AML other m 2021-10-27T17:05:45.32
IV.MF5.EHN. ML:1.5 0.00011765495 1.9328 AML other m 2021-10-27T17:05:30.61
IV.TERO.HHE. ML:1.4 7.397663E-5 0.3328 AML other m 2021-10-27T17:05:46.18
IV.TERO.HHN. ML:0.8 2.035365E-5 0.1024 AML other m 2021-10-27T17:05:36.19
IV.TERO.HNE. ML:1.6 0.0001231634 0.6912 AML other m 2021-10-27T17:05:47.35
IV.TERO.HNN. ML:1.8 0.0001666731 1.3312 AML other m 2021-10-27T17:05:45.15
IV.MOMA.HHE. ML:0.8 2.1551871E-5 0.1536 AML other m 2021-10-27T17:05:36.41
IV.MOMA.HHN. ML:0.7 1.43214045E-5 0.1536 AML other m 2021-10-27T17:05:36.95
IV.MOMA.HNE. ML:1.6 0.00013340705 0.7168 AML other m 2021-10-27T17:05:31.90
IV.MOMA.HNN. ML:1.7 0.0001564454 0.6272 AML other m 2021-10-27T17:05:39.16
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