Earthquake with magnitude of ML 1.1 on date 21-10-2020 and time 23:43:17 (Italy) in region 6 km E Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 6 km E Norcia (PG), on

  • 21-10-2020 21:43:17 (UTC)
  • 21-10-2020 23:43:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7980, 13.1650 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 6 4957 4957
Castelsantangelo sul Nera MC 11 281 5238
Arquata del Tronto AP 11 1178 6416
Accumoli RI 13 667 7083
Preci PG 14 724 7807
Montegallo AP 15 523 8330
Cascia PG 15 3217 11547
Visso MC 16 1107 12654
Ussita MC 16 444 13098
Montemonaco AP 18 604 13702
Cittareale RI 20 482 14184

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
47 Km W of Teramo (54892 inhabitants)
50 Km NE of Terni (111501 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
94 Km W of Pescara (121014 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NW of Chieti (51815 inhabitants)
96 Km E of Viterbo (67173 inhabitants)
98 Km NE of Tivoli (56533 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2020-10-21
21:43:17
42.7985 13.1648 10 2020-10-21
21:50:22
Sala Sismica INGV-Roma 84004501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-21 21:43:17 ± 0.06
Latitude 42.7985 ± 0.0036
Longitude 13.1648 ± 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 84004501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 406
Semi-minor axis of confidence ellipse (meter) 288
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 260
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.05126
Epicentral distance of station farthest from the epicenter (degree) 0.29498
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 84004501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-21 21:50:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2020-10-21T21:43:29.47 0.3 undecidable manual S 49 31.8459 50 0.54 64
IV.CSP1.EHZ. 2020-10-21T21:43:29.01 0.3 undecidable manual S 6 32.745 50 -0.15 70
IV.CESI.HHZ. 2020-10-21T21:43:28.77 0.6 undecidable manual S 317 31.1466 50 0.03 48
IV.FDMO.HHZ. 2020-10-21T21:43:27.23 0.3 undecidable manual S 347 27.1506 50 -0.44 66
IV.LNSS.HHZ. 2020-10-21T21:43:26.68 0.3 undecidable manual S 205 23.9538 112 -0.02 73
IV.SMA1.EHZ. 2020-10-21T21:43:26.51 0.3 undecidable manual S 143 23.2545 113 0.04 73
IV.GAVE.HNZ. 2020-10-21T21:43:26.81 0.3 undecidable manual S 242 24.9528 112 -0.22 70
IV.T1299.HNZ. 2020-10-21T21:43:25.75 0.3 undecidable manual S 152 20.5683 116 0.12 72
IV.MTRA.HNZ. 2020-10-21T21:43:25.01 0.3 undecidable manual S 104 19.4694 117 -0.26 70
IV.CSP1.EHZ. 2020-10-21T21:43:24.12 0.1 undecidable manual P 6 32.745 50 -0.2 93
IV.CESI.HHZ. 2020-10-21T21:43:24.05 0.1 undecidable manual P 317 31.1466 50 -0.03 96
IV.MF5.EHZ. 2020-10-21T21:43:24.42 0.1 undecidable manual P 49 31.8459 50 0.24 92
IV.MMO1.EHZ. 2020-10-21T21:43:24.33 0.1 undecidable manual S 50 17.2716 120 -0.28 93
IV.GAVE.HNZ. 2020-10-21T21:43:23.25 0.1 undecidable manual P 242 24.9528 112 0.16 95
IV.MC2.EHZ. 2020-10-21T21:43:23.66 0.3 undecidable manual S 9 12.6762 128 0.38 69
IV.FDMO.HHZ. 2020-10-21T21:43:23.22 0.1 undecidable manual P 347 27.1506 50 -0.24 93
IT.MTCL.HGZ. 2020-10-21T21:43:23.92 0.1 undecidable manual P 328 25.4523 111 0.74 80
IV.LNSS.HHZ. 2020-10-21T21:43:22.82 0.1 undecidable manual P 205 23.9538 112 -0.08 96
IV.SMA1.EHZ. 2020-10-21T21:43:22.82 0.1 undecidable manual P 143 23.2545 113 0.06 97
IV.T1299.HNZ. 2020-10-21T21:43:22.41 0.1 undecidable manual P 152 20.5683 116 0.13 96
IV.MC2.EHZ. 2020-10-21T21:43:21.11 0.1 undecidable manual P 9 12.6762 128 0.19 96
IV.MTRA.HNZ. 2020-10-21T21:43:21.84 0.3 undecidable manual P 104 19.4694 117 -0.23 71
IV.MMO1.EHZ. 2020-10-21T21:43:21.53 0.1 undecidable manual P 50 17.2716 120 -0.16 96
IV.NRCA.HHZ. 2020-10-21T21:43:21.29 0.3 undecidable manual S 313 5.6943 150 -0.37 70
IV.NRCA.HHZ. 2020-10-21T21:43:20.03 0.1 undecidable manual P 313 5.6943 150 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.0002765 1.12 AML other m 2020-10-21T21:43:21.98
IV.NRCA.HHE. ML:1.4 0.000393 0.28 AML other m 2020-10-21T21:43:21.54
IV.LNSS.HHE. ML:1.1 0.00008115 0.22 AML other m 2020-10-21T21:43:27.02
IV.LNSS.HHN. ML:1.1 0.00007605 0.18 AML other m 2020-10-21T21:43:27.18
IV.FDMO.HHE. ML:0.7 0.00002615 0.2 AML other m 2020-10-21T21:43:27.65
IV.FDMO.HHN. ML:0.8 0.0000309 0.16 AML other m 2020-10-21T21:43:28.68
IV.CESI.HHN. ML:0.8 0.0000313 0.48 AML other m 2020-10-21T21:43:29.31
IV.CESI.HHE. ML:0.6 0.000017899999999999998 0.96 AML other m 2020-10-21T21:43:29.15
IV.NRCA.HNE. ML:1.3 0.00031962410000000005 0.0768 AML other m 2020-10-21T21:43:21.58
IV.NRCA.HNN. ML:1.2 0.00022757395 0.0512 AML other m 2020-10-21T21:43:21.44
IV.CSP1.EHE. ML:1.3 0.00008261143 0.3584 AML other m 2020-10-21T21:43:29.80
IV.CSP1.EHN. ML:1.1 0.00005641449499999999 0.2176 AML other m 2020-10-21T21:43:30.09
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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