Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 18-01-2021 and time 04:42:33 (UTC) in region 4 km E Sellano (PG)

A magnitude ML 1.7 earthquake occured in region: 4 km E Sellano (PG), on

  • 18-01-2021 04:42:33 (UTC)
  • 18-01-2021 05:42:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.89, 12.97 at 10 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
Sellano PG 4 1079 1079
Preci PG 5 724 1803
Cerreto di Spoleto PG 9 1075 2878
Visso MC 11 1107 3985
Monte Cavallo MC 12 145 4130
Norcia PG 14 4957 9087
Castelsantangelo sul Nera MC 15 281 9368
Ussita MC 15 444 9812
Vallo di Nera PG 16 364 10176
Campello sul Clitunno PG 18 2442 12618
Trevi PG 18 8469 21087
Pieve Torina MC 19 1458 22545
Cascia PG 19 3217 25762
Fiordimonte MC 19 202 25964
Poggiodomo PG 20 117 26081

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
54 Km E of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Ancona (100861 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
Reviewed
Rev100 		ML 1.7 2021-01-18
04:42:33		 42.89 12.97 10 2021-01-18
05:17:50		 Sala Sismica INGV-Roma 86345341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-18 04:42:33 ± 0.06
Latitude 42.89 ± 0.00
Longitude 12.97 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86345341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 297
Semi-minor axis of confidence ellipse (meter) 212
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 69
Circular confidence region, given by single value of horizontal uncertainty (meter) 300
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 51
Number of defining phases 49
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
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 27
Number of stations from which data was used for origin computation 25
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 41
Type of magnitude ML
Reference to an origin 86345341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-18 05:17:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FIAM.HHZ. 2021-01-18T04:42:56.31 3.0 undecidable manual S 0.4 0
IV.VVLD.HHZ. 2021-01-18T04:42:56.24 3.0 undecidable manual P 0
IV.ATSC.EHN. 2021-01-18T04:42:53.83 0.3 undecidable manual S 339 0.5756 50 0.49 63
IV.SSFR.HHN. 2021-01-18T04:42:53.68 0.6 undecidable manual S 346 0.5666 50 0.62 40
IV.TERO.HHZ. 2021-01-18T04:42:52.28 0.3 undecidable manual S 120 0.5324 50 0.22 67
IV.CING.HNE. 2021-01-18T04:42:52.06 0.1 undecidable manual S 18 0.5144 50 0.55 83
IV.FOSV.HNZ. 2021-01-18T04:42:49.17 0.3 undecidable manual S 339 0.4362 50 -0.03 71
IV.EL6.EHZ. 2021-01-18T04:42:49.90 0.3 undecidable manual S 12 0.4515 50 0.24 68
IV.CESX.HHZ. 2021-01-18T04:42:48.10 0.3 undecidable manual S 226 0.3975 50 0.03 72
IV.RM33.EHZ. 2021-01-18T04:42:48.57 0.3 undecidable manual S 155 0.4173 50 -0.07 71
IV.MF5.EHZ. 2021-01-18T04:42:47.93 0.3 undecidable manual S 74 0.3696 50 0.71 60
IV.ARRO.EHE. 2021-01-18T04:42:46.22 0.3 undecidable manual S 206 0.3435 50 -0.24 69
IV.T1299.HNZ. 2021-01-18T04:42:46.73 0.3 undecidable manual S 138 0.339 50 0.4 67
IV.MTRA.EHZ. 2021-01-18T04:42:46.04 0.1 undecidable manual S 113 0.3363 50 -0.2 93
IV.GUMA.HHZ. 2021-01-18T04:42:45.86 0.3 undecidable manual S 56 0.3175 50 0.19 70
IV.MDAR.HNE. 2021-01-18T04:42:45.68 0.3 undecidable manual S 22 0.3292 50 -0.35 68
IV.MOMA.HHZ. 2021-01-18T04:42:45.86 0.3 undecidable manual S 254 0.3076 50 0.47 66
IV.SSFR.HHN. 2021-01-18T04:42:44.68 0.1 undecidable manual P 346 0.5666 50 -0.14 90
IV.ASSB.HHZ. 2021-01-18T04:42:44.22 0.1 undecidable manual S 304 0.2779 50 -0.29 93
IV.PF6.EHE. 2021-01-18T04:42:44.76 0.3 undecidable manual S 33 0.2977 50 -0.34 68
IV.LNSS.HHZ. 2021-01-18T04:42:44.66 0.3 undecidable manual S 170 0.2887 50 -0.16 71
IV.ATSC.EHN. 2021-01-18T04:42:44.71 0.3 undecidable manual P 339 0.5756 50 -0.28 66
IV.CING.HNE. 2021-01-18T04:42:43.77 0.1 undecidable manual P 18 0.5144 50 -0.16 91
IV.CSP1.EHZ. 2021-01-18T04:42:43.83 0.3 undecidable manual S 39 0.2653 50 -0.3 69
IV.TERO.HHZ. 2021-01-18T04:42:43.94 0.1 undecidable manual P 120 0.5324 50 -0.3 88
IV.RM33.EHZ. 2021-01-18T04:42:42.18 0.1 undecidable manual P 155 0.4173 50 -0.09 94
IV.FOSV.HNZ. 2021-01-18T04:42:42.38 0.1 undecidable manual P 339 0.4362 50 -0.21 91
IV.EL6.EHZ. 2021-01-18T04:42:42.73 0.1 undecidable manual P 12 0.4515 50 -0.13 93
IV.MF5.EHZ. 2021-01-18T04:42:41.69 0.3 undecidable manual P 74 0.3696 50 0.24 69
IV.SMA1.EHZ. 2021-01-18T04:42:41.82 0.1 undecidable manual P 134 0.3687 50 0.37 89
IV.CESX.HHZ. 2021-01-18T04:42:41.69 0.3 undecidable manual P 226 0.3975 50 -0.25 68
IV.MOMA.HHZ. 2021-01-18T04:42:40.85 0.1 undecidable manual P 254 0.3076 50 0.46 89
IV.ARRO.EHE. 2021-01-18T04:42:40.96 0.1 undecidable manual P 206 0.3435 50 -0.05 96
IV.GUMA.HHZ. 2021-01-18T04:42:40.68 0.1 undecidable manual P 56 0.3175 50 0.12 95
IV.T1299.HNZ. 2021-01-18T04:42:40.88 0.1 undecidable manual P 138 0.339 50 -0.06 96
IV.MDAR.HNE. 2021-01-18T04:42:40.53 0.1 undecidable manual P 22 0.3292 50 -0.24 93
IV.MTRA.EHZ. 2021-01-18T04:42:40.70 0.1 undecidable manual P 113 0.3363 50 -0.19 94
IV.FDMO.HHZ. 2021-01-18T04:42:40.63 0.1 undecidable manual S 29 0.1709 118 -0.37 93
IV.LNSS.HHZ. 2021-01-18T04:42:39.92 0.1 undecidable manual P 170 0.2887 50 -0.15 95
IV.NRCA.HHZ. 2021-01-18T04:42:39.15 0.1 undecidable manual S 118 0.116 128 -0.07 100
IV.CSP1.EHZ. 2021-01-18T04:42:39.52 0.1 positive manual P 39 0.2653 50 -0.15 96
IV.CESI.HHZ. 2021-01-18T04:42:39.58 0.3 undecidable manual S 337 0.1277 125 -0.01 76
IV.ASSB.HHZ. 2021-01-18T04:42:39.72 0.1 undecidable manual P 304 0.2779 50 -0.17 95
IV.PF6.EHE. 2021-01-18T04:42:39.99 0.1 undecidable manual P 33 0.2977 50 -0.24 93
IT.MTCL.HGZ. 2021-01-18T04:42:38.86 0.1 undecidable manual S 10 0.1079 130 -0.13 99
IV.FEMA.HNZ. 2021-01-18T04:42:38.74 0.6 undecidable manual S 37 0.0935 134 0.19 49
IV.CESI.HHZ. 2021-01-18T04:42:37.32 0.1 undecidable manual P 337 0.1277 125 0.27 96
IV.FDMO.HHZ. 2021-01-18T04:42:37.89 0.1 undecidable manual P 29 0.1709 118 0.03 100
IV.FEMA.HNZ. 2021-01-18T04:42:36.77 0.1 undecidable manual P 37 0.0935 134 0.32 95
IT.MTCL.HGZ. 2021-01-18T04:42:36.87 0.1 undecidable manual P 10 0.1079 130 0.17 98
IV.NRCA.HHZ. 2021-01-18T04:42:36.98 0.1 undecidable manual P 118 0.116 128 0.15 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FEMA.HNN. ML:2.3 0.002725 0.12 AML other m 2021-01-18T04:42:38.92
IV.FEMA.HNE. ML:2.5 0.004025 1.86 AML other m 2021-01-18T04:42:39.96
IV.NRCA.HNN. ML:2 0.00108092425 0.0896 AML other m 2021-01-18T04:42:39.38
IV.NRCA.HHN. ML:2 0.0011808135 0.0992 AML other m 2021-01-18T04:42:39.43
IV.NRCA.HNE. ML:2 0.00097705845 0.1216 AML other m 2021-01-18T04:42:40.78
IV.NRCA.HHE. ML:2 0.0010219344 0.1216 AML other m 2021-01-18T04:42:40.78
IV.CESI.HHE. ML:2 0.001016 1.88 AML other m 2021-01-18T04:42:40.02
IV.CESI.HHN. ML:2.1 0.00128369265 0.24 AML other m 2021-01-18T04:42:40.02
IV.CESI.HNN. ML:2.1 0.00132215665 0.2272 AML other m 2021-01-18T04:42:40.02
IV.CESI.HNE. ML:1.9 0.0008763024 0.1088 AML other m 2021-01-18T04:42:39.96
IV.FDMO.HHE. ML:2.5 0.002255 1.86 AML other m 2021-01-18T04:42:40.00
IV.FDMO.HHN. ML:2.2 0.0011505 0.16 AML other m 2021-01-18T04:42:41.25
IV.ASSB.HHN. ML:1.4 0.0001267887 0.1184 AML other m 2021-01-18T04:42:45.13
IV.ASSB.HHE. ML:1.6 0.000164 0.18 AML other m 2021-01-18T04:42:44.51
IV.CSP1.EHE. ML:2.2 0.0007087344 0.2208 AML other m 2021-01-18T04:42:44.42
IV.LNSS.HHN. ML:1.7 0.00022479005 0.1984 AML other m 2021-01-18T04:42:45.12
IV.CSP1.EHN. ML:2.1 0.0006051621 0.24 AML other m 2021-01-18T04:42:44.48
IV.LNSS.HHE. ML:1.6 0.00016589525 0.1984 AML other m 2021-01-18T04:42:45.62
IV.MOMA.HHE. ML:1.4 0.00011272955 0.16 AML other m 2021-01-18T04:42:47.59
IV.MOMA.HHN. ML:1.5 0.000120555025 0.1792 AML other m 2021-01-18T04:42:46.92
IV.CESX.HHN. ML:1.4 8.1836463E-5 0.3392 AML other m 2021-01-18T04:42:50.85
IV.CESX.HHE. ML:1.4 8.67E-5 1.32 AML other m 2021-01-18T04:42:50.20
IV.LNSS.HNE. ML:1.6 0.00017717275 0.208 AML other m 2021-01-18T04:42:45.62
IV.LNSS.HNN. ML:1.7 0.0002421109 0.2304 AML other m 2021-01-18T04:42:45.14
IV.GUMA.HHE. ML:1.8 0.0002375046 0.1792 AML other m 2021-01-18T04:42:46.22
IV.GUMA.HNE. ML:1.8 0.00022418945 0.72 AML other m 2021-01-18T04:42:48.69
IV.GUMA.HNN. ML:2.2 0.0007105738 0.9184 AML other m 2021-01-18T04:42:55.64
IV.MTRA.EHE. ML:1.3 7.3427705E-5 0.1984 AML other m 2021-01-18T04:42:47.72
IV.MTRA.EHN. ML:1.4 9.171626E-5 0.1792 AML other m 2021-01-18T04:42:46.85
IV.MTRA.HNE. ML:1.5 0.000124619365 0.4608 AML other m 2021-01-18T04:42:51.72
IV.MTRA.HNN. ML:1.7 0.00018036935 0.88 AML other m 2021-01-18T04:42:39.83
IV.SMA1.EHE. ML:1.4 8.5586635E-5 0.7392 AML other m 2021-01-18T04:42:54.67
IV.SMA1.EHN. ML:1.3 6.7354865E-5 0.3616 AML other m 2021-01-18T04:42:48.22
IV.RM33.HNE. ML:1.7 0.000138211455 0.4096 AML other m 2021-01-18T04:42:49.80
IV.RM33.HNN. ML:1.7 0.00012756557 0.5216 AML other m 2021-01-18T04:42:52.63
IV.RM33.EHE. ML:1.4 7.9816755E-5 0.3776 AML other m 2021-01-18T04:42:50.66
IV.RM33.EHN. ML:1.3 5.5121115E-5 0.1376 AML other m 2021-01-18T04:42:49.98
IV.EL6.EHE. ML:2 0.0002831534 1.9584 AML other m 2021-01-18T04:42:42.89
IV.EL6.EHN. ML:1.9 0.0002049983 1.8176 AML other m 2021-01-18T04:42:42.89
IV.TERO.HHE. ML:1.1 2.54960706E-5 0.2176 AML other m 2021-01-18T04:42:56.82
IV.TERO.HHN. ML:1.2 3.2328993E-5 0.32 AML other m 2021-01-18T04:42:53.68
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