Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.2 on date 28-09-2019 and time 19:46:24 (Italy) in region 4 km E Norcia (PG)

A magnitude ML 0.2 earthquake occured in region: 4 km E Norcia (PG), on

  • 28-09-2019 17:46:24 (UTC)
  • 28-09-2019 19:46:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8030, 13.1460 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 10 281 5238
Preci PG 12 724 5962
Arquata del Tronto AP 13 1178 7140
Cascia PG 14 3217 10357
Accumoli RI 15 667 11024
Visso MC 15 1107 12131
Ussita MC 16 444 12575
Montegallo AP 16 523 13098
Montemonaco AP 18 604 13702
Cerreto di Spoleto PG 19 1075 14777
Poggiodomo PG 20 117 14894

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
48 Km W of Teramo (54892 inhabitants)
49 Km NE of Terni (111501 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
95 Km W of Pescara (121014 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
98 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
Bulletin
Rev1000 		ML 0.2 2019-09-28
17:46:24		 42.8033 13.1462 10 2020-02-28
16:42:13		 Bollettino Sismico Italiano INGV 74699661
Reviewed
Rev100 		ML 0.6 2019-09-28
17:46:24		 42.7998 13.1433 8 2019-09-28
17:58:08		 Sala Sismica INGV-Roma 72862601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-28 17:46:24 ± 0.05
Latitude 42.8033 ± 0.0027
Longitude 13.1462 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 74699661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 403
Semi-minor axis of confidence ellipse (meter) 304
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) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.45506
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:0.2

Field Value
Value 0.2
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 74699661
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-12-16 09:36:23

ML:0.6

Field Value
Value 0.6
Uncertainty 0.5
Num. used stations 8
Type of magnitude ML
Reference to an origin 72862601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-28 17:58:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.GORR.HHZ. 2019-09-28T17:47:56.04 3.0 undecidable manual Sg 4.75 0
IV.ACATE.EHZ. 2019-09-28T17:47:50.83 3.0 positive manual Pn -0.35 0
IV.IMI.HHZ. 2019-09-28T17:47:26.92 3.0 undecidable manual Pg 5.17 0
IV.AGLI.HHZ. 2019-09-28T17:47:19.53 3.0 positive manual Pg 1.96 0
IV.LRP.EHZ. 2019-09-28T17:47:08.49 3.0 undecidable manual Sg -0.27 0
IV.VITU.HHZ. 2019-09-28T17:47:01.61 3.0 undecidable manual Pg 5.57 0
IT.PLTA.HNZ. 2019-09-28T17:46:49.33 3.0 negative manual Pn 0.82 0
IV.CPGN.EHZ. 2019-09-28T17:46:48.12 3.0 undecidable manual Sn -6.58 0
IT.VNF1.HGZ. 2019-09-28T17:46:47.58 3.0 negative manual Pn -2.61 0
IV.APEC.HHZ. 2019-09-28T17:46:33.88 3.0 undecidable manual P -1.84 0
IV.LNSS.HHE. 2019-09-28T17:46:33.25 0.3 undecidable manual S 201 23.8539 50 -0.07 72
IV.MOMA.HNZ. 2019-09-28T17:46:33.33 0.6 undecidable manual P 270 46.9197 50 0.25 44
IV.FDMO.HHZ. 2019-09-28T17:46:33.82 0.3 undecidable manual S 350 26.3514 50 -0.16 71
IV.SMA1.EHE. 2019-09-28T17:46:33.45 0.6 undecidable manual S 141 24.5532 50 -0.07 48
IV.CESX.HHE. 2019-09-28T17:46:33.90 0.6 undecidable manual P 245 50.5161 50 0.27 44
IV.MTRA.EHZ. 2019-09-28T17:46:32.41 0.3 undecidable manual S 104 21.0678 116 -0.08 72
IV.TERO.HHZ. 2019-09-28T17:46:32.64 0.6 undecidable manual P 118 42.3243 50 0.26 44
IV.MMO1.EHZ. 2019-09-28T17:46:31.64 0.3 undecidable manual S 54 18.1707 120 0.03 73
IV.RM33.HNE. 2019-09-28T17:46:30.72 0.1 undecidable manual P 170 33.1446 50 -0.24 91
IV.MC2.EHZ. 2019-09-28T17:46:30.06 0.3 undecidable manual S 16 12.4764 130 0.07 73
IV.CESI.HHZ. 2019-09-28T17:46:30.56 0.1 undecidable manual P 319 29.748 50 0.12 93
IV.SMA1.EHE. 2019-09-28T17:46:29.68 0.1 undecidable manual P 141 24.5532 50 0.04 96
IV.T1299.HNZ. 2019-09-28T17:46:29.44 0.1 undecidable manual P 149 21.7671 116 0.26 93
IV.MTRA.EHZ. 2019-09-28T17:46:29.03 0.1 undecidable manual P 104 21.0678 116 -0.02 97
IV.LNSS.HHE. 2019-09-28T17:46:29.45 0.1 undecidable manual P 201 23.8539 50 -0.08 95
IV.FDMO.HHZ. 2019-09-28T17:46:29.58 0.1 undecidable manual P 350 26.3514 50 -0.33 91
IV.MMO1.EHZ. 2019-09-28T17:46:28.49 0.1 undecidable manual P 54 18.1707 120 -0.05 97
IV.FEMA.HNZ. 2019-09-28T17:46:28.95 0.3 undecidable manual P 336 19.2696 118 0.21 70
IV.NRCA.HHZ. 2019-09-28T17:46:27.91 0.3 undecidable manual S 322 4.2957 158 -0.34 69
IV.MC2.EHZ. 2019-09-28T17:46:27.80 0.1 undecidable manual P 16 12.4764 130 0.2 95
IV.NRCA.HHZ. 2019-09-28T17:46:26.64 0.1 undecidable manual P 322 4.2957 158 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:0.3 0.000015920049999999997 0.1536 AML other m 2019-09-28T17:46:33.25
IV.FDMO.HHN. ML:0.3 0.000012270655 0.0768 AML other m 2019-09-28T17:46:32.66
IV.MTRA.EHN. ML:0.3 0.0000141933665 0.1536 AML other m 2019-09-28T17:46:32.99
IV.FDMO.HHE. ML:0.0 0.00000688977 0.9984 AML other m 2019-09-28T17:46:33.85
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