Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 18-10-2019 and time 15:40:57 (Italy) in region 7 km E Norcia (PG)

A magnitude ML 0.4 earthquake occured in region: 7 km E Norcia (PG), on

  • 18-10-2019 13:40:57 (UTC)
  • 18-10-2019 15:40:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8200, 13.1770 at 8 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 7 4957 4957
Castelsantangelo sul Nera MC 9 281 5238
Arquata del Tronto AP 11 1178 6416
Preci PG 13 724 7140
Montegallo AP 13 523 7663
Ussita MC 14 444 8107
Visso MC 14 1107 9214
Accumoli RI 15 667 9881
Montemonaco AP 15 604 10485
Cascia PG 17 3217 13702
Montefortino FM 19 1178 14880
Acquasanta Terme AP 20 2916 17796
Bolognola MC 20 142 17938

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
47 Km W of Teramo (54892 inhabitants)
52 Km NE of Terni (111501 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
94 Km W of Pescara (121014 inhabitants)
96 Km NW of Chieti (51815 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km E of Viterbo (67173 inhabitants)
100 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
Bulletin
Rev1000 		ML 0.4 2019-10-18
13:40:57		 42.8202 13.1768 8 2020-02-28
16:42:13		 Bollettino Sismico Italiano INGV 74580341
Reviewed
Rev100 		ML 0.9 2019-10-18
13:40:56		 42.7973 13.1717 10 2019-10-18
13:54:18		 Sala Sismica INGV-Roma 73324681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-18 13:40:57 ± 0.15
Latitude 42.8202 ± 0.0045
Longitude 13.1768 ± 0.0049
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 74580341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 523
Semi-minor axis of confidence ellipse (meter) 142
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 34
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 175
Number of associated phases, regardless of their use for origin computation 27
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27249
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.0
Num. used stations 4
Type of magnitude ML
Reference to an origin 74580341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-12-12 13:48:31

ML:0.9

Field Value
Value 0.9
Uncertainty 0.5
Num. used stations 8
Type of magnitude ML
Reference to an origin 73324681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-18 13:54:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
HL.VLS.HHZ. 2019-10-18T13:42:44.36 3.0 positive manual Pn 6.48 0
CR.ZAG.BHZ. 2019-10-18T13:42:38.48 3.0 undecidable manual Sn 0.12 0
IV.PRMA.HHZ. 2019-10-18T13:42:29.01 3.0 undecidable manual Sg 3.93 0
CR.STON.BHZ. 2019-10-18T13:42:25.98 3.0 undecidable manual Sn 1.9 0
IV.ACATE.HNZ. 2019-10-18T13:42:19.47 3.0 undecidable manual Pn 0.65 0
IV.MARS.EHZ. 2019-10-18T13:42:13.67 3.0 positive manual Pg 4.91 0
IV.MOCL.EHZ. 2019-10-18T13:41:56.92 3.0 undecidable manual Sn -4.52 0
IV.SPS2.HHZ. 2019-10-18T13:41:52.39 3.0 negative manual Pn -3.52 0
IV.PRMA.HHZ. 2019-10-18T13:41:52.63 3.0 undecidable manual Pg 7.37 0
CR.STON.BHZ. 2019-10-18T13:41:48.90 3.0 undecidable manual Pn 4.2 0
IT.VNF1.HGZ. 2019-10-18T13:41:33.13 3.0 undecidable manual S -3.53 0
IV.CSNT.HHZ. 2019-10-18T13:41:25.82 3.0 undecidable manual Pg -1.18 0
IV.MAON.HHZ. 2019-10-18T13:41:23.75 3.0 undecidable manual Pg -2 0
IV.CSP1.EHN. 2019-10-18T13:41:08.40 0.6 undecidable manual S 4 30.2475 106 -0.06 48
IV.FDMO.HHZ. 2019-10-18T13:41:06.70 0.6 undecidable manual S 343 25.0527 109 -0.05 49
IT.MTCL.HGZ. 2019-10-18T13:41:06.39 0.6 undecidable manual S 323 24.0537 109 -0.03 49
IV.MTRA.EHZ. 2019-10-18T13:41:05.03 0.6 undecidable manual S 111 19.1697 114 0.18 48
IV.CSP1.EHN. 2019-10-18T13:41:03.80 0.3 undecidable manual P 4 30.2475 106 -0.05 73
IV.MMO1.EHZ. 2019-10-18T13:41:03.30 0.3 undecidable manual S 54 15.0738 119 -0.24 72
IV.FDMO.HHZ. 2019-10-18T13:41:03.16 0.6 undecidable manual P 343 25.0527 109 0.29 47
IT.MTCL.HGZ. 2019-10-18T13:41:02.48 0.3 undecidable manual P 323 24.0537 109 -0.2 71
IV.MC2.EHZ. 2019-10-18T13:41:02.39 0.3 undecidable manual S 6 10.1787 130 0.24 72
IV.MTRA.EHZ. 2019-10-18T13:41:01.69 0.3 undecidable manual P 111 19.1697 114 -0.08 74
IV.MMO1.EHZ. 2019-10-18T13:41:00.97 0.3 undecidable manual P 54 15.0738 119 -0.05 75
IV.NRCA.HHZ. 2019-10-18T13:41:00.73 0.6 undecidable manual S 286 5.2947 148 -0.29 48
IV.MC2.EHZ. 2019-10-18T13:41:00.44 0.3 undecidable manual P 6 10.1787 130 0.23 73
IV.NRCA.HHZ. 2019-10-18T13:40:59.67 0.1 negative manual P 286 5.2947 148 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.4 0.00037887105 0.1088 AML other m 2019-10-18T13:41:00.95
IV.NRCA.HHE. ML:1.4 0.0004150712 0.16 AML other m 2019-10-18T13:41:00.90
IV.NRCA.HHN. ML:1.3 0.00031717165000000005 0.1408 AML other m 2019-10-18T13:41:00.98
IV.NRCA.HNN. ML:1.3 0.00030371505 0.0896 AML other m 2019-10-18T13:41:01.31
IV.FDMO.HHN. ML:0.4 0.0000129001095 0.2752 AML other m 2019-10-18T13:41:06.90
IV.CAMP.HHE. ML:0.4 0.0000085529035 0.064 AML other m 2019-10-18T13:41:07.21
IV.CAMP.HHN. ML:0.4 0.000008436771499999999 0.0768 AML other m 2019-10-18T13:41:07.29
IV.FDMO.HHE. ML:0.4 0.000012690249 0.1792 AML other m 2019-10-18T13:41:08.51
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