Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 20-10-2019 and time 04:41:26 (Italy) in region 1 km W Norcia (PG)

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

  • 20-10-2019 02:41:26 (UTC)
  • 20-10-2019 04:41:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7880, 13.0770 at 9 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.

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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
Cascia PG 9 3217 8174
Preci PG 11 724 8898
Cerreto di Spoleto PG 14 1075 9973
Castelsantangelo sul Nera MC 14 281 10254
Poggiodomo PG 14 117 10371
Visso MC 16 1107 11478
Sellano PG 17 1079 12557
Accumoli RI 17 667 13224
Vallo di Nera PG 18 364 13588
Arquata del Tronto AP 18 1178 14766
Ussita MC 18 444 15210
Monteleone di Spoleto PG 18 599 15809
Cittareale RI 20 482 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
99 Km SW of Ancona (100861 inhabitants)
100 Km W of Pescara (121014 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 1.2 2019-10-20
02:41:26		 42.7878 13.0773 9 2019-10-20
02:47:33		 Sala Sismica INGV-Roma 73349991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-20 02:41:26 ± 0.07
Latitude 42.7878 ± 0.0027
Longitude 13.0773 ± 0.0049
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73349991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 327
Semi-minor axis of confidence ellipse (meter) 272
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 223
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.62323
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 18
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 73349991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-20 02:47:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PE3.EHZ. 2019-10-20T02:42:00.06 3.0 undecidable manual S -0.11 0
IV.MURB.HHZ. 2019-10-20T02:41:48.98 0.3 undecidable manual S 320 69.1752 50 0.79 56
IV.EL6.EHZ. 2019-10-20T02:41:46.34 0.3 undecidable manual S 2 60.0954 50 0.57 62
IV.SNTG.HHZ. 2019-10-20T02:41:43.87 0.6 undecidable manual S 348 53.0025 50 0 48
IV.TERO.HHZ. 2019-10-20T02:41:41.82 0.1 undecidable manual S 113 46.7199 50 -0.37 90
IV.MOMA.HHZ. 2019-10-20T02:41:41.22 0.3 undecidable manual S 273 41.3253 50 0.46 66
IV.MMUR.HNZ. 2019-10-20T02:41:40.04 3.0 undecidable manual P 0.17 0
IV.MF5.EHZ. 2019-10-20T02:41:40.55 0.3 undecidable manual S 54 38.1285 50 0.63 63
IV.MURB.HHZ. 2019-10-20T02:41:39.22 0.1 undecidable manual P 320 69.1752 50 0.1 91
IV.CSP1.EHZ. 2019-10-20T02:41:38.86 0.3 undecidable manual S 17 35.2425 50 -0.28 70
IV.ARRO.EHZ. 2019-10-20T02:41:38.83 0.3 undecidable manual S 228 34.3434 50 -0.07 73
IV.RM33.EHZ. 2019-10-20T02:41:38.35 0.3 undecidable manual S 160 32.9448 50 -0.16 72
IV.ATCC.EHZ. 2019-10-20T02:41:37.14 0.6 negative manual P 321 56.5989 50 -0.04 47
IV.EL6.EHZ. 2019-10-20T02:41:37.83 0.1 undecidable manual P 2 60.0954 50 0.11 92
IV.MTRA.EHZ. 2019-10-20T02:41:36.17 0.3 undecidable manual S 97 26.2515 108 -0.13 73
IV.SNTG.HHZ. 2019-10-20T02:41:36.02 0.1 undecidable manual P 348 53.0025 50 -0.6 83
IV.CESI.HHZ. 2019-10-20T02:41:36.62 0.3 undecidable manual S 330 27.8499 107 -0.22 72
IV.SMA1.EHZ. 2019-10-20T02:41:36.87 0.3 undecidable manual S 130 27.3504 107 0.21 72
IV.MNTT.EHZ. 2019-10-20T02:41:36.81 0.1 undecidable manual P 54 51.9036 50 0.35 89
IV.FDMO.HHZ. 2019-10-20T02:41:36.53 0.1 undecidable manual S 2 27.5502 107 -0.22 96
IV.TERO.HHZ. 2019-10-20T02:41:35.30 0.1 undecidable manual P 113 46.7199 50 -0.35 90
IV.MMO1.EHZ. 2019-10-20T02:41:35.74 0.1 undecidable manual S 59 23.754 110 0.25 96
IV.MF5.EHZ. 2019-10-20T02:41:34.44 0.1 undecidable manual P 54 38.1285 50 0.1 96
IV.MOMA.HHZ. 2019-10-20T02:41:34.76 0.1 undecidable manual P 273 41.3253 50 -0.06 96
IV.LNSS.HHZ. 2019-10-20T02:41:34.69 0.6 undecidable manual S 188 20.7681 113 0.18 49
IV.ASSB.HHZ. 2019-10-20T02:41:34.86 0.1 undecidable manual P 310 44.2224 50 -0.41 89
IV.RM33.EHZ. 2019-10-20T02:41:33.37 0.1 undecidable manual P 160 32.9448 50 -0.16 96
IV.CSP1.EHZ. 2019-10-20T02:41:33.52 0.1 undecidable manual P 17 35.2425 50 -0.37 91
IV.ARRO.EHZ. 2019-10-20T02:41:33.75 0.1 undecidable manual P 228 34.3434 50 0 99
IV.SMA1.EHZ. 2019-10-20T02:41:32.51 0.1 undecidable manual P 130 27.3504 107 0.05 99
IV.FDMO.HHZ. 2019-10-20T02:41:32.45 0.6 negative manual P 2 27.5502 107 -0.06 49
IV.MTRA.EHZ. 2019-10-20T02:41:32.24 0.1 undecidable manual P 97 26.2515 108 -0.01 100
IV.CESI.HHZ. 2019-10-20T02:41:32.42 0.1 undecidable manual P 330 27.8499 107 -0.14 97
IV.MMO1.EHZ. 2019-10-20T02:41:31.88 0.1 undecidable manual P 59 23.754 110 0.1 99
IV.LNSS.HHZ. 2019-10-20T02:41:31.58 0.1 negative manual P 188 20.7681 113 0.36 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.4 0.0001705 0.16 AML other m 2019-10-20T02:41:35.42
IV.LNSS.HHN. ML:1.4 0.00016599999999999997 0.16 AML other m 2019-10-20T02:41:35.73
IV.CESI.HHE. ML:1.0 0.000059499999999999996 1.54 AML other m 2019-10-20T02:41:36.18
IV.CESI.HHN. ML:1.5 0.000158 0.6 AML other m 2019-10-20T02:41:37.05
IV.FDMO.HHE. ML:1.0 0.0000492 0.9 AML other m 2019-10-20T02:41:37.08
IV.FDMO.HHN. ML:1.0 0.00004775 1.38 AML other m 2019-10-20T02:41:38.70
IV.SMA1.EHN. ML:1.1 0.00007165000000000001 0.88 AML other m 2019-10-20T02:41:38.69
IV.SMA1.EHE. ML:1.2 0.00008599999999999999 1.24 AML other m 2019-10-20T02:41:38.89
IV.MTRA.EHE. ML:1.2 0.00009245000000000001 0.6 AML other m 2019-10-20T02:41:38.06
IV.MTRA.EHN. ML:1.1 0.0000701 0.68 AML other m 2019-10-20T02:41:39.51
IV.RM33.EHN. ML:1.1 0.00006165 0.42 AML other m 2019-10-20T02:41:39.96
IV.RM33.EHE. ML:1.1 0.000047799999999999996 0.8 AML other m 2019-10-20T02:41:40.15
IV.MOMA.HHE. ML:1.4 0.00008060000000000001 0.2 AML other m 2019-10-20T02:41:42.13
IV.MOMA.HHN. ML:1.1 0.0000393 0.72 AML other m 2019-10-20T02:41:42.56
IV.TERO.HHN. ML:1.1 0.000037900000000000006 0.62 AML other m 2019-10-20T02:41:43.53
IV.TERO.HHE. ML:1.0 0.0000303 0.28 AML other m 2019-10-20T02:41:43.39
IV.MURB.HHE. ML:1.5 0.00004765 0.18 AML other m 2019-10-20T02:41:50.47
IV.MURB.HHN. ML:1.5 0.0000535 0.42 AML other m 2019-10-20T02:41:50.69
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