Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 26-10-2019 and time 22:38:36 (Italy) in region 4 km E Sellano (PG)

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

  • 26-10-2019 20:38:36 (UTC)
  • 26-10-2019 22:38:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.88, 12.97 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sellano PG 4 1079 1079
Preci PG 5 724 1803
Cerreto di Spoleto PG 8 1075 2878
Visso MC 11 1107 3985
Monte Cavallo MC 13 145 4130
Norcia PG 14 4957 9087
Vallo di Nera PG 15 364 9451
Castelsantangelo sul Nera MC 15 281 9732
Ussita MC 16 444 10176
Campello sul Clitunno PG 17 2442 12618
Cascia PG 18 3217 15835
Trevi PG 18 8469 24304
Poggiodomo PG 19 117 24421
Sant'Anatolia di Narco PG 19 564 24985
Pieve Torina MC 20 1458 26443

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km E of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
54 Km E of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
87 Km NE of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
100 Km N of Guidonia Montecelio (88673 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.0 2019-10-26
20:38:36		 42.88 12.97 11 2019-10-26
20:51:47		 Sala Sismica INGV-Roma 73461581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-26 20:38:36 ± 0.07
Latitude 42.88 ± 0.00
Longitude 12.97 ± 0.01
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 73461581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 552
Semi-minor axis of confidence ellipse (meter) 356
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 68
Circular confidence region, given by single value of horizontal uncertainty (meter) 550
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.57557
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 73461581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-26 20:51:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.DGI.HHZ. 2019-10-26T20:40:28.36 3.0 undecidable manual Sg 11.79 0
IV.MNTV.HNZ. 2019-10-26T20:40:03.29 3.0 undecidable manual Sg 8.56 0
IV.BRMO.HHZ. 2019-10-26T20:39:48.88 3.0 negative manual Pg 10.48 0
IV.IFIL.HHZ. 2019-10-26T20:39:46.38 3.0 negative manual Pn 0.99 0
IV.VARE.HHZ. 2019-10-26T20:39:46.78 3.0 undecidable manual Pn 5.58 0
IV.PIGN.HHZ. 2019-10-26T20:39:36.64 3.0 undecidable manual Sg 1.15 0
IV.SGG.HHZ. 2019-10-26T20:39:33.50 3.0 undecidable manual Sg 0.07 0
IT.ORP.HGZ. 2019-10-26T20:39:19.30 3.0 undecidable manual Pn 3.44 0
IV.ZCCA.HHZ. 2019-10-26T20:39:10.77 3.0 negative manual Pn -0.53 0
IT.VNF1.HGZ. 2019-10-26T20:39:06.58 3.0 undecidable manual Pn 0.61 0
IV.SRES.HHZ. 2019-10-26T20:38:54.49 3.0 undecidable manual P 1.96 0
IV.SSFR.HHZ. 2019-10-26T20:38:48.50 0.1 undecidable manual P 346 0.5756 50 0.2 88
IV.ASSB.HHZ. 2019-10-26T20:38:47.93 0.3 undecidable manual S 306 0.2833 50 0 73
IV.LNSS.HNE. 2019-10-26T20:38:47.78 0.3 undecidable manual S 170 0.2788 50 -0.02 73
IV.CSP1.EHZ. 2019-10-26T20:38:47.52 0.3 undecidable manual S 38 0.2734 50 -0.1 72
IV.MML1.EHN. 2019-10-26T20:38:46.50 0.3 undecidable manual S 360 0.2356 50 -0.03 74
IV.FDMO.HHZ. 2019-10-26T20:38:44.50 0.6 undecidable manual S 28 0.1799 118 -0.3 47
IV.CESI.HHZ. 2019-10-26T20:38:43.28 0.3 undecidable manual S 339 0.1367 125 -0.11 74
IV.CSP1.EHZ. 2019-10-26T20:38:43.13 0.3 undecidable manual P 38 0.2734 50 0.01 73
IV.LNSS.HNE. 2019-10-26T20:38:43.23 0.1 undecidable manual P 170 0.2788 50 0 98
IV.ASSB.HHZ. 2019-10-26T20:38:43.21 0.3 undecidable manual P 306 0.2833 50 -0.08 72
IV.MOMA.HHZ. 2019-10-26T20:38:43.06 0.6 undecidable manual P 256 0.3049 50 -0.6 42
IV.MML1.EHN. 2019-10-26T20:38:42.48 0.1 undecidable manual P 360 0.2356 50 -0.01 98
IT.MTCL.HGE. 2019-10-26T20:38:42.49 0.3 undecidable manual S 9 0.1178 129 -0.31 71
IV.FEMA.HNE. 2019-10-26T20:38:42.21 0.3 undecidable manual S 34 0.1016 133 -0.12 74
IV.NRCA.HHZ. 2019-10-26T20:38:42.34 0.3 undecidable manual S 113 0.1124 130 -0.3 71
IV.MC2.EHZ. 2019-10-26T20:38:41.54 0.6 undecidable manual P 78 0.1619 121 0.4 46
IV.FDMO.HHZ. 2019-10-26T20:38:41.43 0.3 undecidable manual P 28 0.1799 118 -0.06 74
IV.NRCA.HHZ. 2019-10-26T20:38:40.29 0.1 undecidable manual P 113 0.1124 130 0.05 100
IT.MTCL.HGE. 2019-10-26T20:38:40.46 0.3 undecidable manual P 9 0.1178 129 0.12 74
IV.CESI.HHZ. 2019-10-26T20:38:40.91 0.1 undecidable manual P 339 0.1367 125 0.23 96
IV.FEMA.HNE. 2019-10-26T20:38:40.54 0.1 undecidable manual P 34 0.1016 133 0.47 91
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.0001865 0.12 AML other m 2019-10-26T20:38:42.47
IV.NRCA.HHE. ML:1 0.000113 0.62 AML other m 2019-10-26T20:38:42.24
IV.CESI.HHN. ML:1 8.54E-5 0.4 AML other m 2019-10-26T20:38:43.68
IV.CESI.HHE. ML:0.7 4.4E-5 0.4 AML other m 2019-10-26T20:38:43.66
IV.FDMO.HHN. ML:1 6.685E-5 1.84 AML other m 2019-10-26T20:38:45.94
IV.FDMO.HHE. ML:1.2 0.0001173 1.2 AML other m 2019-10-26T20:38:45.69
IV.SGG.HHE. ML:2.7 0.0001485 1.24 AML other m 2019-10-26T20:39:37.82
IV.SGG.HHN. ML:2.7 0.0001615 0.48 AML other m 2019-10-26T20:39:37.45
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download