Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 17-01-2021 and time 10:50:47 (Italy) in region 6 km SE Forni di Sotto (UD)

A magnitude ML 0.8 earthquake occured in region: 6 km SE Forni di Sotto (UD), on

  • 17-01-2021 09:50:47 (UTC)
  • 17-01-2021 10:50:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.35, 12.72 at 12 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
Forni di Sotto UD 6 600 600
Tramonti di Sopra PN 7 321 921
Tramonti di Sotto PN 9 387 1308
Ampezzo UD 10 1006 2314
Socchieve UD 10 908 3222
Preone UD 13 246 3468
Sauris UD 13 416 3884
Forni di Sopra UD 13 993 4877
Enemonzo UD 14 1319 6196
Frisanco PN 15 622 6818
Raveo UD 15 458 7276
Meduno PN 16 1574 8850
Villa Santina UD 18 2233 11083
Cavasso Nuovo PN 18 1525 12608
Claut PN 18 956 13564
Andreis PN 18 259 13823
Fanna PN 18 1583 15406
Lauco UD 19 729 16135
Ovaro UD 19 1922 18057
Maniago PN 20 11698 29755

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km N of Pordenone (51229 inhabitants)
51 Km NW of Udine (99169 inhabitants)
84 Km NE of Treviso (83731 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 0.8 2021-01-17
09:50:47		 46.35 12.72 12 2021-01-17
09:58:30		 Sala Sismica INGV-Roma 86326231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-17 09:50:47 ± 0.1
Latitude 46.35 ± 0.00
Longitude 12.72 ± 0.01
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86326231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 508
Semi-minor axis of confidence ellipse (meter) 137
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 308
Circular confidence region, given by single value of horizontal uncertainty (meter) 510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.08903
Epicentral distance of station farthest from the epicenter (degree) 0.2653
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 86326231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-17 09:58:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.BOO.HNZ. 2021-01-17T09:50:57.10 0.6 undecidable manual S 96 0.2653 94 -0.36 45
OX.MLN.HNZ. 2021-01-17T09:50:56.18 0.6 undecidable manual S 199 0.2113 96 0.31 46
OX.MPRI.HHZ. 2021-01-17T09:50:56.07 0.6 undecidable manual S 120 0.2167 95 0.05 48
IV.FVI.HHZ. 2021-01-17T09:50:56.86 0.6 undecidable manual S 10 0.2509 94 -0.17 46
OX.FUSE.HHZ. 2021-01-17T09:50:55.90 0.6 undecidable manual S 72 0.2068 96 0.17 48
OX.CIMO.HHZ. 2021-01-17T09:50:54.78 0.3 undecidable manual S 259 0.1907 97 -0.47 66
OX.CLUD.HHZ. 2021-01-17T09:50:54.01 0.6 undecidable manual S 47 0.1565 102 -0.25 46
IV.FVI.HHZ. 2021-01-17T09:50:53.20 0.3 negative manual P 10 0.2509 94 0.35 69
IT.DANT.HNE. 2021-01-17T09:50:53.68 0.6 undecidable manual P 328 0.2563 94 0.74 41
OX.FUSE.HHZ. 2021-01-17T09:50:52.06 0.1 positive manual P 72 0.2068 96 -0.04 97
OX.MLN.HNZ. 2021-01-17T09:50:52.30 0.6 undecidable manual P 199 0.2113 96 0.13 48
IV.STAL.HHZ. 2021-01-17T09:50:52.46 0.6 undecidable manual S 182 0.089 127 0.02 50
OX.MPRI.HHZ. 2021-01-17T09:50:52.17 0.1 negative manual P 120 0.2167 95 -0.09 96
OX.BOO.HNZ. 2021-01-17T09:50:52.86 0.6 undecidable manual P 96 0.2653 94 -0.24 46
OX.CLUD.HHZ. 2021-01-17T09:50:51.28 0.1 positive manual P 47 0.1565 102 0.04 99
OX.CIMO.HHZ. 2021-01-17T09:50:51.76 1.0 undecidable manual P 259 0.1907 97 -0.06 24
IV.STAL.HHZ. 2021-01-17T09:50:50.19 0.1 negative manual P 182 0.089 127 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.STAL.HHN. ML:1.2 0.000202 0.84 AML other m 2021-01-17T09:50:52.60
IV.STAL.HHE. ML:1.2 0.0001635 0.3 AML other m 2021-01-17T09:50:53.14
OX.CLUD.HHN. ML:0.7 4.225E-5 0.48 AML other m 2021-01-17T09:50:54.37
OX.CLUD.HHE. ML:0.5 2.32E-5 1.02 AML other m 2021-01-17T09:50:56.52
IV.FVI.HHE. ML:1.6 0.000192 0.2 AML other m 2021-01-17T09:50:57.22
IV.FVI.HHN. ML:1.4 0.000125 0.46 AML other m 2021-01-17T09:50:57.22
IV.STAL.HNE. ML:1.2 0.0001883455 0.1472 AML other m 2021-01-17T09:50:53.29
IV.STAL.HNN. ML:1.4 0.0002618009 0.0896 AML other m 2021-01-17T09:50:53.24
OX.CLUD.HNE. ML:0.6 3.230779E-5 0.864 AML other m 2021-01-17T09:50:54.81
OX.CIMO.HHE. ML:0.4 1.7057369E-5 0.0768 AML other m 2021-01-17T09:50:54.00
OX.CIMO.HHN. ML:0.5 1.8982155E-5 0.1408 AML other m 2021-01-17T09:50:54.88
OX.CIMO.HNE. ML:0.5 1.7732375E-5 0.3008 AML other m 2021-01-17T09:50:55.16
OX.CIMO.HNN. ML:0.6 2.34840175E-5 0.2752 AML other m 2021-01-17T09:50:54.89
OX.MPRI.HHE. ML:0.8 3.99645315E-5 0.2432 AML other m 2021-01-17T09:50:56.79
OX.MPRI.HHN. ML:0.8 3.9869215E-5 0.224 AML other m 2021-01-17T09:50:56.93
OX.MPRI.HNE. ML:0.9 4.2676897E-5 0.2624 AML other m 2021-01-17T09:50:56.79
OX.MPRI.HNN. ML:0.8 3.653372E-5 0.224 AML other m 2021-01-17T09:50:56.92
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