Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 21-10-2019 and time 01:48:41 (Italy) in region 4 km NE Norcia (PG)

A magnitude ML 0.6 earthquake occured in region: 4 km NE Norcia (PG), on

  • 20-10-2019 23:48:41 (UTC)
  • 21-10-2019 01:48:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8220, 13.1230 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.

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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 4 4957 4957
Castelsantangelo sul Nera MC 9 281 5238
Preci PG 9 724 5962
Visso MC 13 1107 7069
Ussita MC 14 444 7513
Cascia PG 15 3217 10730
Arquata del Tronto AP 15 1178 11908
Cerreto di Spoleto PG 17 1075 12983
Montegallo AP 17 523 13506
Accumoli RI 17 667 14173
Sellano PG 18 1079 15252
Montemonaco AP 19 604 15856
Poggiodomo PG 20 117 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km W of Pescara (121014 inhabitants)
99 Km N of Tivoli (56533 inhabitants)
100 Km NW of Chieti (51815 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 0.6 2019-10-20
23:48:41		 42.8217 13.1232 10 2019-10-20
23:55:57		 Sala Sismica INGV-Roma 73364091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-20 23:48:41 ± 0.07
Latitude 42.8217 ± 0.0036
Longitude 13.1232 ± 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 73364091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 611
Semi-minor axis of confidence ellipse (meter) 311
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.31926
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 12
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 73364091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-20 23:55:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PLMA.HHZ. 2019-10-20T23:49:20.69 3.0 undecidable manual Pg 7.92 0
IV.MOCL.EHZ. 2019-10-20T23:49:10.23 3.0 positive manual Pg 5.47 0
IV.CET2.HHZ. 2019-10-20T23:49:09.30 3.0 undecidable manual Pn -1.01 0
IV.MAON.HHZ. 2019-10-20T23:49:04.84 3.0 undecidable manual Sn -2.82 0
IV.RM33.HNZ. 2019-10-20T23:48:54.54 0.3 undecidable manual S 168 35.4423 50 0.44 67
IV.MML1.. 2019-10-20T23:48:54.01 3.0 undecidable manual S 0
IV.MF5.EHZ. 2019-10-20T23:48:53.97 0.3 undecidable manual S 56 32.9448 50 0.54 65
IV.CSP1.EHZ. 2019-10-20T23:48:52.75 0.6 undecidable manual S 12 30.6471 50 -0.07 49
IV.T1299.HNE. 2019-10-20T23:48:51.27 0.6 undecidable manual S 148 24.4533 112 0.12 49
IV.SMA1.EHE. 2019-10-20T23:48:51.49 0.6 undecidable manual S 141 27.3504 50 -0.44 46
IV.LNSS.HNN. 2019-10-20T23:48:51.30 0.6 undecidable manual S 196 25.1526 50 -0.06 50
IV.CESI.HNE. 2019-10-20T23:48:51.56 0.6 undecidable manual S 319 26.9508 50 -0.27 47
IV.MTRA.HNZ. 2019-10-20T23:48:50.43 0.6 undecidable manual S 108 23.3544 113 -0.36 47
IV.MML1.EHZ. 2019-10-20T23:48:50.26 3.0 undecidable manual P 0
IV.FDMO.HHZ. 2019-10-20T23:48:50.68 0.6 undecidable manual S 353 24.0537 113 -0.31 47
IV.RM33.HNZ. 2019-10-20T23:48:48.70 0.1 undecidable manual P 168 35.4423 50 -0.26 93
IV.CSP1.EHZ. 2019-10-20T23:48:48.05 0.1 undecidable manual P 12 30.6471 50 -0.18 96
IV.MF5.EHZ. 2019-10-20T23:48:48.60 0.1 undecidable manual P 56 32.9448 50 0.02 98
IV.FDMO.HHZ. 2019-10-20T23:48:47.05 1.0 negative manual P 353 24.0537 113 -0.12 24
IV.LNSS.HNN. 2019-10-20T23:48:47.34 0.1 undecidable manual P 196 25.1526 50 -0.04 100
IV.CESI.HNE. 2019-10-20T23:48:47.68 0.1 undecidable manual P 319 26.9508 50 0.02 99
IV.T1299.HNE. 2019-10-20T23:48:47.29 0.1 undecidable manual P 148 24.4533 112 0.03 100
IV.SMA1.EHE. 2019-10-20T23:48:47.94 0.1 undecidable manual P 141 27.3504 50 0.22 95
IV.MC2.EHZ. 2019-10-20T23:48:47.41 0.6 undecidable manual S 28 11.2776 132 0.19 49
IV.MMO1.EHZ. 2019-10-20T23:48:46.13 1.0 undecidable manual P 62 18.6702 118 -0.07 25
IV.MTRA.HNZ. 2019-10-20T23:48:46.65 0.1 undecidable manual P 108 23.3544 113 -0.41 92
IV.MC2.EHZ. 2019-10-20T23:48:45.40 1.0 negative manual P 28 11.2776 132 0.41 24
IV.NRCA.HHZ. 2019-10-20T23:48:45.58 0.6 undecidable manual S 331 1.4985 172 0.08 52
IV.NRCA.HHZ. 2019-10-20T23:48:44.38 0.1 positive manual P 331 1.4985 172 0.38 97
IV.TOLF.HHZ. 2019-10-20T23:48:37.72 3.0 undecidable manual P -0.51 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:0.6 0.00007355 0.34 AML other m 2019-10-20T23:48:45.81
IV.NRCA.HHN. ML:0.6 0.00006890000000000001 0.16 AML other m 2019-10-20T23:48:45.82
IV.NRCA.HNE. ML:0.8 0.00011152923 0.9728 AML other m 2019-10-20T23:48:45.82
IV.NRCA.HNN. ML:0.9 0.00016172720499999999 0.5248 AML other m 2019-10-20T23:48:46.19
IV.FDMO.HHE. ML:0.2 0.000011345284000000001 1.088 AML other m 2019-10-20T23:48:50.78
IV.FDMO.HHN. ML:0.4 0.000015175650000000001 1.7024 AML other m 2019-10-20T23:48:52.04
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