Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 26-09-2018 and time 18:09:12 (Italy) in region 3 km SW Norcia (PG)

A magnitude ML 1.3 earthquake occured in region: 3 km SW Norcia (PG), on

  • 26-09-2018 16:09:12 (UTC)
  • 26-09-2018 18:09:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7650, 13.0800 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 3 4957 4957
Cascia PG 7 3217 8174
Poggiodomo PG 13 117 8291
Preci PG 13 724 9015
Cerreto di Spoleto PG 15 1075 10090
Castelsantangelo sul Nera MC 16 281 10371
Accumoli RI 16 667 11038
Monteleone di Spoleto PG 16 599 11637
Cittareale RI 18 482 12119
Vallo di Nera PG 18 364 12483
Arquata del Tronto AP 18 1178 13661
Visso MC 19 1107 14768
Sellano PG 19 1079 15847

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
89 Km E of Viterbo (67173 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
99 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
Bulletin
Rev1000 		ML 1.3 2018-09-26
16:09:12		 42.7652 13.0795 10 2019-06-04
09:16:09		 Bollettino Sismico Italiano INGV 65259881
Reviewed
Rev100 		ML 1.5 2018-09-26
16:09:12		 42.7685 13.0852 10 2018-09-26
16:31:55		 Sala Sismica INGV-Roma 61337171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-26 16:09:12 ± 0.05
Latitude 42.7652 ± 0.0018
Longitude 13.0795 ± 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 65259881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 395
Semi-minor axis of confidence ellipse (meter) 58
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
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) 142
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41099
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 65259881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-05-02 13:24:10

ML:1.5

Field Value
Value 1.5
Uncertainty 0.6
Num. used stations 6
Type of magnitude ML
Reference to an origin 61337171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-26 16:31:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CGL.BHZ. 2018-09-26T16:11:11.66 3.0 undecidable manual Sn -3.6 0
IV.SALB.HHZ. 2018-09-26T16:10:53.32 3.0 undecidable manual S -1.3 0
GU.SATI.HHZ. 2018-09-26T16:10:31.83 3.0 undecidable manual P 5.79 0
IV.SGTA.HHZ. 2018-09-26T16:10:19.80 3.0 undecidable manual Sn -4.7 0
IV.SALB.HHZ. 2018-09-26T16:10:15.57 3.0 undecidable manual P 4.2 0
IV.SARZ.HHZ. 2018-09-26T16:10:15.68 3.0 positive manual P 6.02 0
IV.PAOL.HHZ. 2018-09-26T16:10:15.20 3.0 undecidable manual Sg -2 0
GU.RNCA.HHZ. 2018-09-26T16:10:09.62 3.0 positive manual P 3.09 0
IV.PTRJ.HNZ. 2018-09-26T16:10:08.07 3.0 undecidable manual S 1.81 0
IV.LTRZ.HNZ. 2018-09-26T16:10:07.75 3.0 undecidable manual P -0.06 0
IV.NDIM.HNZ. 2018-09-26T16:09:59.12 3.0 positive manual P 3.63 0
IV.TREG.HNZ. 2018-09-26T16:09:58.96 3.0 undecidable manual P -2.61 0
IV.MTMR.HNZ. 2018-09-26T16:09:54.95 3.0 undecidable manual P 3.62 0
IV.PTRJ.HNZ. 2018-09-26T16:09:46.50 3.0 undecidable manual P 3.05 0
IV.LMD.HHZ. 2018-09-26T16:09:41.46 3.0 undecidable manual P -0.31 0
IV.ATFO.HHZ. 2018-09-26T16:09:37.33 3.0 undecidable manual S -2.65 0
TV.SF01.EHZ. 2018-09-26T16:09:32.57 3.0 undecidable manual P -0.28 0
IV.TERO.HHZ. 2018-09-26T16:09:27.24 0.3 undecidable manual S 110 45.621 50 0.09 71
IV.CSP1.EHZ. 2018-09-26T16:09:25.01 0.3 undecidable manual S 16 37.629 50 -0.02 73
IV.MML1.EHZ. 2018-09-26T16:09:25.68 0.3 undecidable manual S 347 39.627 50 0.12 71
IV.CESI.HHZ. 2018-09-26T16:09:23.04 0.3 undecidable manual S 332 30.1476 50 0 74
IV.FDMO.HHZ. 2018-09-26T16:09:22.69 0.6 undecidable manual S 1 30.1476 50 -0.33 46
IV.RM33.EHZ. 2018-09-26T16:09:22.99 0.1 undecidable manual S 159 30.4473 50 -0.13 97
IV.SMA1.EHZ. 2018-09-26T16:09:22.13 0.3 undecidable manual S 126 25.6521 50 0.3 71
IV.MTRA.EHZ. 2018-09-26T16:09:21.65 0.6 undecidable manual S 92 25.8519 50 -0.23 48
IV.MMO1.EHE. 2018-09-26T16:09:21.47 0.6 undecidable manual S 53 25.0527 50 -0.2 48
IV.MML1.EHZ. 2018-09-26T16:09:20.03 0.3 undecidable manual P 347 39.627 50 0.07 72
IV.TERO.HHZ. 2018-09-26T16:09:20.71 0.1 undecidable manual P 110 45.621 50 -0.17 93
IV.CSP1.EHZ. 2018-09-26T16:09:19.73 0.1 undecidable manual P 16 37.629 50 0.07 97
IV.LNSS.HHZ. 2018-09-26T16:09:19.42 0.3 undecidable manual S 190 18.2706 119 -0.16 74
IV.MC2.EHZ. 2018-09-26T16:09:19.82 0.6 undecidable manual S 29 18.4704 119 0.18 49
IV.RM33.EHZ. 2018-09-26T16:09:18.45 0.1 undecidable manual P 159 30.4473 50 -0.11 97
IV.CESI.HHZ. 2018-09-26T16:09:18.52 0.1 positive manual P 332 30.1476 50 0.01 99
IV.FDMO.HHZ. 2018-09-26T16:09:18.42 0.1 undecidable manual P 1 30.1476 50 -0.08 98
IV.MMO1.EHE. 2018-09-26T16:09:17.88 0.3 undecidable manual P 53 25.0527 50 0.16 73
IV.SMA1.EHZ. 2018-09-26T16:09:17.99 0.1 undecidable manual P 126 25.6521 50 0.18 96
IV.MTRA.EHZ. 2018-09-26T16:09:17.78 0.1 undecidable manual P 92 25.8519 50 -0.06 99
IV.MC2.EHZ. 2018-09-26T16:09:16.74 0.1 undecidable manual P 29 18.4704 119 0.19 97
IV.NRCA.HNZ. 2018-09-26T16:09:16.51 0.1 undecidable manual S 20 8.0808 141 -0.31 97
IV.LNSS.HHZ. 2018-09-26T16:09:16.66 0.1 undecidable manual P 190 18.2706 119 0.15 98
IV.NRCA.HNZ. 2018-09-26T16:09:15.07 0.1 undecidable manual P 20 8.0808 141 0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.4 0.0001995 1.26 AML other m 2018-09-26T16:09:19.17
IV.LNSS.HHN. ML:1.5 0.00023449999999999998 1.32 AML other m 2018-09-26T16:09:19.90
IV.MTRA.EHN. ML:1.3 0.000113 1.28 AML other m 2018-09-26T16:09:22.86
IV.MTRA.EHE. ML:1.2 0.00008985 0.5 AML other m 2018-09-26T16:09:23.47
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
Waveforms Seismic signals in miniseed + resp format not available