Earthquake with magnitude of ML 0.9 on date 20-10-2021 and time 04:27:35 (Italy) in region 4 km S Resia (UD)

A magnitude ML 0.9 earthquake occured in region: 4 km S Resia (UD), on

  • 20-10-2021 02:27:35 (UTC)
  • 20-10-2021 04:27:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.344, 13.295 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Resia UD 4 1033 1033
Chiusaforte UD 7 672 1705
Resiutta UD 8 309 2014
Lusevera UD 9 643 2657
Moggio Udinese UD 11 1714 4371
Taipana UD 11 636 5007
Dogna UD 12 175 5182
Venzone UD 12 2117 7299
Montenars UD 13 538 7837
Gemona del Friuli UD 14 10964 18801
Bordano UD 15 754 19555
Tarcento UD 15 9012 28567
Artegna UD 16 2885 31452
Magnano in Riviera UD 16 2336 33788
Amaro UD 16 823 34611
Nimis UD 16 2740 37351
Attimis UD 17 1805 39156
Trasaghis UD 18 2227 41383
Pontebba UD 18 1433 42816
Osoppo UD 19 2936 45752
Buja UD 20 6563 52315
Cavazzo Carnico UD 20 1052 53367
Treppo Grande UD 20 1708 55075

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km N of Udine (99169 inhabitants)
65 Km NE of Pordenone (51229 inhabitants)
85 Km NW of Trieste (204420 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 0.9 2021-10-20
02:27:35
46.3438 13.2952 12 2021-10-20
05:21:38
Sala Sismica INGV-Roma 96786481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 02:27:35 ± 0.07
Latitude 46.3438 ± 0.0027
Longitude 13.2952 ± 0.0052
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 96786481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 326
Semi-minor axis of confidence ellipse (meter) 179
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 258
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.07554
Epicentral distance of station farthest from the epicenter (degree) 0.43527
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 14
Type of magnitude ML
Reference to an origin 96786481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 05:21:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FVI.HHE. 2021-10-20T02:27:51.00 0.3 undecidable manual S 306 0.4353 92 -0.06 69
OX.DRE.HHZ. 2021-10-20T02:27:47.00 0.1 undecidable manual S 125 0.2959 94 0.06 95
OX.CLUD.HHE. 2021-10-20T02:27:47.04 0.6 undecidable manual S 292 0.3067 93 -0.22 46
IV.FVI.HHE. 2021-10-20T02:27:45.10 0.3 undecidable manual P 306 0.4353 92 0.53 63
OX.MPRI.HHZ. 2021-10-20T02:27:45.48 0.1 undecidable manual S 244 0.2356 95 0.31 92
OX.PLRO.HHZ. 2021-10-20T02:27:45.04 0.3 undecidable manual S 334 0.2284 96 0.08 73
OX.ACOM.HHZ. 2021-10-20T02:27:45.52 0.1 undecidable manual S 36 0.2536 95 -0.17 94
OX.FUSE.HHZ. 2021-10-20T02:27:44.40 0.1 undecidable manual S 289 0.2149 97 -0.14 95
OX.CLUD.HHE. 2021-10-20T02:27:42.19 0.1 undecidable manual P 292 0.3067 93 -0.19 93
OX.ACOM.HHZ. 2021-10-20T02:27:41.60 0.1 undecidable manual P 36 0.2536 95 0.13 95
OX.BAD.HNZ. 2021-10-20T02:27:41.78 0.1 undecidable manual S 198 0.1151 117 0.08 98
OX.DRE.HHZ. 2021-10-20T02:27:41.85 0.1 undecidable manual P 125 0.2959 94 -0.34 90
NI.VINO.HHZ. 2021-10-20T02:27:41.01 0.1 undecidable manual S 189 0.0908 128 -0.08 99
OX.MPRI.HHZ. 2021-10-20T02:27:41.00 0.1 undecidable manual P 244 0.2356 95 -0.17 94
RF.GEPF.HHZ. 2021-10-20T02:27:41.92 0.1 undecidable manual S 238 0.1277 112 -0.12 97
OX.PLRO.HHZ. 2021-10-20T02:27:41.10 0.1 undecidable manual P 334 0.2284 96 0.05 97
IV.PTCC.HHZ. 2021-10-20T02:27:40.79 0.1 undecidable manual S 32 0.0755 135 0.05 100
OX.FUSE.HHZ. 2021-10-20T02:27:40.83 0.1 undecidable manual P 289 0.2149 97 0.02 98
RF.GEPF.HHZ. 2021-10-20T02:27:39.36 0.1 undecidable manual P 238 0.1277 112 0 100
OX.BAD.HNZ. 2021-10-20T02:27:39.23 0.1 undecidable manual P 198 0.1151 117 0.06 99
IV.PTCC.HHZ. 2021-10-20T02:27:38.75 0.1 undecidable manual P 32 0.0755 135 0.13 98
NI.VINO.HHZ. 2021-10-20T02:27:38.84 0.1 undecidable manual P 189 0.0908 128 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTCC.HHN. ML:1.2 0.00018922075 0.0592 AML other m 2021-10-20T02:27:40.91
IV.PTCC.HHE. ML:1 0.00010824332 0.1392 AML other m 2021-10-20T02:27:41.18
NI.VINO.HHE. ML:0.9 9.14E-5 0.16 AML other m 2021-10-20T02:27:41.07
NI.VINO.HHN. ML:0.9 8.9694255E-5 0.16 AML other m 2021-10-20T02:27:41.16
RF.GEPF.HHE. ML:0.8 6.16E-5 0.22 AML other m 2021-10-20T02:27:42.20
RF.GEPF.HHN. ML:0.9 7.910072E-5 0.16 AML other m 2021-10-20T02:27:42.39
OX.PLRO.HHN. ML:1 4.97E-5 0.22 AML other m 2021-10-20T02:27:45.38
OX.PLRO.HHE. ML:0.7 3.19E-5 0.84 AML other m 2021-10-20T02:27:46.53
OX.MPRI.HHE. ML:0.9 4.12103E-5 0.2992 AML other m 2021-10-20T02:27:46.25
OX.MPRI.HHN. ML:0.8 3.4651285E-5 0.2592 AML other m 2021-10-20T02:27:45.86
OX.MPRI.HNE. ML:0.9 4.065301E-5 0.2784 AML other m 2021-10-20T02:27:46.24
OX.ACOM.HHE. ML:1.2 7.0813735E-5 0.28 AML other m 2021-10-20T02:27:45.91
OX.ACOM.HHN. ML:0.8 2.9814745E-5 0.16 AML other m 2021-10-20T02:27:46.77
OX.ACOM.HNE. ML:1.2 6.801565E-5 0.2992 AML other m 2021-10-20T02:27:45.91
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