Earthquake with magnitude of ML 0.8 on date 22-01-2021 and time 03:26:41 (Italy) in region 4 km NW Frisanco (PN)

A magnitude ML 0.8 earthquake occured in region: 4 km NW Frisanco (PN), on

  • 22-01-2021 02:26:41 (UTC)
  • 22-01-2021 03:26:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.24, 12.7 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Frisanco PN 4 622 622
Andreis PN 8 259 881
Fanna PN 8 1583 2464
Meduno PN 8 1574 4038
Cavasso Nuovo PN 8 1525 5563
Maniago PN 8 11698 17261
Tramonti di Sotto PN 9 387 17648
Montereale Valcellina PN 10 4433 22081
Tramonti di Sopra PN 10 321 22402
Vajont PN 11 1719 24121
Barcis PN 12 256 24377
Arba PN 13 1309 25686
Sequals PN 13 2200 27886
Claut PN 14 956 28842
Travesio PN 15 1776 30618
Forni di Sotto UD 17 600 31218
Castelnovo del Friuli PN 17 880 32098
Clauzetto PN 17 380 32478
Vivaro PN 20 1352 33830

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km N of Pordenone (51229 inhabitants)
46 Km W of Udine (99169 inhabitants)
73 Km NE of Treviso (83731 inhabitants)
94 Km NE of Venezia (263352 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 2021-01-22
02:26:41
46.25 12.69 10 2021-01-22
03:13:08
Sala Sismica INGV-Roma 86444681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-22 02:26:41 ± 0.06
Latitude 46.25 ± 0.00
Longitude 12.69 ± 0.01
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 86444681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 535
Semi-minor axis of confidence ellipse (meter) 257
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 335
Circular confidence region, given by single value of horizontal uncertainty (meter) 530
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.01889
Epicentral distance of station farthest from the epicenter (degree) 0.48024
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.4
Num. used stations 11
Type of magnitude ML
Reference to an origin 86444681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-22 03:13:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.VARN.HHZ. 2021-01-22T02:26:58.45 0.1 undecidable manual S 238 0.4802 50 0.41 87
NI.VINO.HHE. 2021-01-22T02:26:55.77 0.1 undecidable manual S 89 0.4011 50 0.07 95
OX.BAD.HHE. 2021-01-22T02:26:54.56 0.1 undecidable manual S 91 0.3795 50 -0.5 87
RF.GEPF.HHZ. 2021-01-22T02:26:53.23 0.6 undecidable manual S 84 0.3085 50 0.29 46
OX.BOO.HHE. 2021-01-22T02:26:52.53 0.3 undecidable manual S 75 0.2887 50 0.17 71
OX.CAE.HHE. 2021-01-22T02:26:52.64 0.1 undecidable manual S 217 0.2959 50 0.08 97
OX.VARN.HHZ. 2021-01-22T02:26:51.14 0.3 undecidable manual P 238 0.4802 50 0.24 68
OX.CLUD.HHE. 2021-01-22T02:26:51.19 0.1 undecidable manual S 31 0.2473 50 0.04 98
OX.MPRI.HHZ. 2021-01-22T02:26:49.76 0.6 undecidable manual S 91 0.2023 114 0.05 50
NI.VINO.HHE. 2021-01-22T02:26:49.58 0.1 undecidable manual P 89 0.4011 50 0.03 96
OX.BAD.HHE. 2021-01-22T02:26:48.63 0.3 undecidable manual P 91 0.3795 50 -0.55 64
IV.FVI.HHE. 2021-01-22T02:26:48.77 0.3 positive manual P 10 0.3561 50 -0.01 73
OX.CIMO.HHZ. 2021-01-22T02:26:48.80 0.1 undecidable manual S 291 0.1853 116 -0.3 94
OX.BOO.HHE. 2021-01-22T02:26:47.47 0.1 undecidable manual P 75 0.2887 50 -0.15 95
RF.GEPF.HHZ. 2021-01-22T02:26:47.93 1.0 undecidable manual P 84 0.3085 50 -0.03 24
OX.CAE.HHE. 2021-01-22T02:26:47.73 0.1 undecidable manual P 217 0.2959 50 -0.01 98
OX.CLUD.HHE. 2021-01-22T02:26:46.98 0.1 undecidable manual P 31 0.2473 50 0.06 98
OX.MPRI.HHZ. 2021-01-22T02:26:46.37 0.6 undecidable manual P 91 0.2023 114 0.28 47
OX.MLN.HHE. 2021-01-22T02:26:46.41 0.1 undecidable manual S 210 0.1106 130 -0.25 97
OX.CIMO.HHZ. 2021-01-22T02:26:45.53 0.1 negative manual P 291 0.1853 116 -0.21 96
IV.STAL.HHZ. 2021-01-22T02:26:45.08 0.1 undecidable manual S 36 0.0189 169 0.34 97
OX.MLN.HHE. 2021-01-22T02:26:44.24 0.1 undecidable manual P 210 0.1106 130 -0.09 100
IV.STAL.HHZ. 2021-01-22T02:26:43.46 0.1 undecidable manual P 36 0.0189 169 0.24 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OX.CIMO.HHN. ML:0.5 2.32640845E-5 0.08 AML other m 2021-01-22T02:26:48.86
OX.CIMO.HHE. ML:0.8 3.99E-5 0.1 AML other m 2021-01-22T02:26:48.93
RF.GEPF.HHN. ML:0.6 1.5925975E-5 0.1792 AML other m 2021-01-22T02:26:53.53
RF.GEPF.HHE. ML:0.6 1.64256E-5 0.3792 AML other m 2021-01-22T02:26:53.66
IV.STAL.HHE. ML:1.6 0.0006787084 0.16 AML other m 2021-01-22T02:26:46.21
IV.STAL.HHN. ML:1.5 0.00058396765 0.24 AML other m 2021-01-22T02:26:45.30
IV.STAL.HNE. ML:1.6 0.0006564086 0.2208 AML other m 2021-01-22T02:26:45.81
IV.STAL.HNN. ML:1.6 0.0007289361 0.2304 AML other m 2021-01-22T02:26:45.89
OX.CIMO.HNE. ML:0.8 3.903178E-5 0.12 AML other m 2021-01-22T02:26:48.94
OX.CIMO.HNN. ML:0.6 2.824114E-5 0.1392 AML other m 2021-01-22T02:26:49.96
OX.MPRI.HHN. ML:0.8 4.5639595E-5 0.4 AML other m 2021-01-22T02:26:55.99
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