Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 26-10-2017 and time 02:51:50 (Italy) in region 4 km E Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km E Norcia (PG), on

  • 26-10-2017 00:51:50 (UTC)
  • 26-10-2017 02:51:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8070, 13.1440 at 11 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 10 281 5238
Preci PG 12 724 5962
Arquata del Tronto AP 13 1178 7140
Cascia PG 14 3217 10357
Visso MC 15 1107 11464
Accumoli RI 15 667 12131
Ussita MC 15 444 12575
Montegallo AP 16 523 13098
Montemonaco AP 18 604 13702
Cerreto di Spoleto PG 19 1075 14777
Sellano PG 20 1079 15856
Poggiodomo PG 20 117 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
49 Km W of Teramo (54892 inhabitants)
49 Km NE of Terni (111501 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
96 Km W of Pescara (121014 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
Reviewed
Rev100 		ML 1.0 2017-10-26
00:51:50		 42.8067 13.1438 11 2017-10-26
09:38:33		 Sala Sismica INGV-Roma 51330821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-10-26 00:51:50 ± 0.04
Latitude 42.8067 ± 0.0018
Longitude 13.1438 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 51330821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 379
Semi-minor axis of confidence ellipse (meter) 209
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.06655
Epicentral distance of station farthest from the epicenter (degree) 0.38491
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 51330821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-10-26 09:38:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2017-10-26T00:52:04.10 0.3 undecidable manual S 118 42.7239 50 -0.33 68
IV.CSP1.EHZ. 2017-10-26T00:52:01.69 0.3 undecidable manual S 9 32.0457 50 0.1 71
IV.CESI.HHZ. 2017-10-26T00:52:00.78 0.3 undecidable manual S 319 29.3484 50 -0.09 72
IV.FDMO.HHZ. 2017-10-26T00:51:59.89 0.3 undecidable manual S 350 25.8519 50 -0.06 73
IV.SMA1.EHZ. 2017-10-26T00:51:59.69 0.3 undecidable manual S 141 25.0527 50 -0.03 74
IV.T1299.EHZ. 2017-10-26T00:51:59.23 0.3 undecidable manual S 149 22.1556 50 0.26 70
IV.LNSS.HHZ. 2017-10-26T00:51:59.49 0.3 undecidable manual S 201 24.1536 50 0.01 74
IV.TERO.HHZ. 2017-10-26T00:51:58.51 0.3 undecidable manual P 118 42.7239 50 -0.06 72
IV.MMO1.EHZ. 2017-10-26T00:51:57.73 0.3 undecidable manual S 55 18.0708 50 -0.14 74
IV.CESI.HHZ. 2017-10-26T00:51:56.46 0.1 undecidable manual P 319 29.3484 50 -0.06 97
IV.MC2.EHZ. 2017-10-26T00:51:56.51 0.3 undecidable manual S 18 12.1767 132 0.25 72
IV.CSP1.EHZ. 2017-10-26T00:51:56.95 0.1 undecidable manual P 9 32.0457 50 0.02 97
IV.T1299.EHZ. 2017-10-26T00:51:55.53 0.1 undecidable manual P 149 22.1556 50 0.12 97
IV.LNSS.HHZ. 2017-10-26T00:51:55.65 0.1 undecidable manual P 201 24.1536 50 -0.06 98
IV.FDMO.HHZ. 2017-10-26T00:51:55.86 0.1 undecidable manual P 350 25.8519 50 -0.12 96
IV.SMA1.EHZ. 2017-10-26T00:51:55.82 0.1 undecidable manual P 141 25.0527 50 -0.03 99
IV.MMO1.EHZ. 2017-10-26T00:51:54.68 0.1 undecidable manual P 55 18.0708 50 -0.1 99
IV.T1214.EHZ. 2017-10-26T00:51:54.93 0.3 undecidable manual S 135 7.3815 146 -0.24 73
IV.T1214.EHZ. 2017-10-26T00:51:53.32 0.1 undecidable manual P 135 7.3815 146 0.1 100
IV.MC2.EHZ. 2017-10-26T00:51:53.98 0.1 undecidable manual P 18 12.1767 132 0.13 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:0.9 0.000048349999999999996 0.66 AML other m 2017-10-26T00:51:59.66
IV.LNSS.HHN. ML:1.1 0.0000705 1.64 AML other m 2017-10-26T00:52:00.95
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