Earthquake with magnitude of ML 0.8 on date 23-08-2021 and time 16:17:14 (Italy) in region 7 km SE Preone (UD)

A magnitude ML 0.8 earthquake occured in region: 7 km SE Preone (UD), on

  • 23-08-2021 14:17:14 (UTC)
  • 23-08-2021 16:17:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.342, 12.904 at 5 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
Preone UD 7 246 246
Enemonzo UD 8 1319 1565
Villa Santina UD 8 2233 3798
Verzegnis UD 9 863 4661
Socchieve UD 9 908 5569
Tramonti di Sopra PN 9 321 5890
Lauco UD 9 729 6619
Tramonti di Sotto PN 10 387 7006
Raveo UD 11 458 7464
Cavazzo Carnico UD 11 1052 8516
Tolmezzo UD 11 10440 18956
Ampezzo UD 12 1006 19962
Clauzetto PN 13 380 20342
Vito d'Asio PN 13 769 21111
Forgaria nel Friuli UD 14 1786 22897
Trasaghis UD 15 2227 25124
Amaro UD 15 823 25947
Castelnovo del Friuli PN 16 880 26827
Bordano UD 16 754 27581
Ovaro UD 16 1922 29503
Travesio PN 16 1776 31279
Zuglio UD 16 595 31874
Meduno PN 17 1574 33448
Osoppo UD 17 2936 36384
Arta Terme UD 17 2171 38555
Pinzano al Tagliamento PN 18 1525 40080
Venzone UD 18 2117 42197
Forni di Sotto UD 19 600 42797
Ragogna UD 19 2909 45706
Comeglians UD 19 516 46222
Cavasso Nuovo PN 19 1525 47747
Gemona del Friuli UD 20 10964 58711
Frisanco PN 20 622 59333

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of Udine (99169 inhabitants)
47 Km NE of Pordenone (51229 inhabitants)
91 Km NE of Treviso (83731 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.8 2021-08-23
14:17:14
46.3423 12.9042 5 2021-08-23
14:29:35
Sala Sismica INGV-Roma 94542461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-23 14:17:14 ± 0.16
Latitude 46.3423 ± 0.0027
Longitude 12.9042 ± 0.0039
Depth (km) 5 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94542461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 350
Semi-minor axis of confidence ellipse (meter) 96
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 136
Circular confidence region, given by single value of horizontal uncertainty (meter) 350
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 114
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.09803
Epicentral distance of station farthest from the epicenter (degree) 0.27789
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 94542461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-23 14:29:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.MLN.HNZ. 2021-08-23T14:17:26.04 0.6 undecidable manual S 226 0.2779 99 0.24 62
OX.PLRO.HHZ. 2021-08-23T14:17:25.05 0.6 undecidable manual S 39 0.2662 100 -0.32 61
NI.VINO.HHZ. 2021-08-23T14:17:25.47 0.6 undecidable manual S 109 0.2716 100 -0.09 64
NI.VINO.HHZ. 2021-08-23T14:17:21.07 1.0 positive manual P 109 0.2716 100 -0.01 33
OX.MLN.HNZ. 2021-08-23T14:17:21.31 1.0 undecidable manual P 226 0.2779 99 0.09 32
OX.PLRO.HHZ. 2021-08-23T14:17:20.98 1.0 positive manual P 39 0.2662 100 0.01 33
IV.STAL.HHZ. 2021-08-23T14:17:20.79 0.6 undecidable manual S 238 0.1574 106 -0.48 60
OX.BOO.HNZ. 2021-08-23T14:17:20.34 0.6 undecidable manual S 100 0.1358 109 -0.15 65
OX.MPRI.HHZ. 2021-08-23T14:17:19.92 0.6 undecidable manual S 150 0.1169 112 0.12 65
OX.FUSE.HNZ. 2021-08-23T14:17:19.05 0.6 undecidable manual S 43 0.098 115 -0.09 66
OX.CLUD.HHZ. 2021-08-23T14:17:19.92 0.6 undecidable manual S 352 0.1151 112 0.17 65
IV.STAL.HHZ. 2021-08-23T14:17:18.47 0.3 negative manual P 238 0.1574 106 -0.13 97
OX.BOO.HNZ. 2021-08-23T14:17:18.14 0.3 undecidable manual P 100 0.1358 109 -0.01 100
OX.FUSE.HNZ. 2021-08-23T14:17:17.59 0.3 undecidable manual P 43 0.098 115 0.22 97
OX.CLUD.HHZ. 2021-08-23T14:17:17.88 0.6 negative manual P 352 0.1151 112 0.15 65
OX.MPRI.HHZ. 2021-08-23T14:17:17.94 0.3 negative manual P 150 0.1169 112 0.19 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OX.MPRI.HHE. ML:0.8 8.28051E-5 0.1216 AML other m 2021-08-23T14:17:20.48
OX.CLUD.HHE. ML:0.6 5.2742565E-5 0.2624 AML other m 2021-08-23T14:17:20.28
OX.CLUD.HHN. ML:0.3 2.5439294E-5 0.1408 AML other m 2021-08-23T14:17:20.50
OX.MPRI.HHN. ML:1 0.00011619285 0.3392 AML other m 2021-08-23T14:17:21.08
IV.STAL.HHN. ML:1.1 0.0001214 0.1 AML other m 2021-08-23T14:17:21.22
IV.STAL.HHE. ML:1 0.0001007 0.5 AML other m 2021-08-23T14:17:21.79
OX.PLRO.HHE. ML:0.8 3.598667E-5 0.3584 AML other m 2021-08-23T14:17:25.06
OX.PLRO.HHN. ML:1.1 6.1755395E-5 0.2816 AML other m 2021-08-23T14:17:26.86
OX.CLUD.HNE. ML:0.5 4.3335845E-5 0.2432 AML other m 2021-08-23T14:17:20.41
OX.CLUD.HNN. ML:0.4 3.2441395E-5 0.416 AML other m 2021-08-23T14:17:22.51
OX.MPRI.HNE. ML:0.7 6.9483575E-5 0.1216 AML other m 2021-08-23T14:17:20.47
OX.MPRI.HNN. ML:0.9 9.4333065E-5 0.3008 AML other m 2021-08-23T14:17:21.08
IV.STAL.HNE. ML:1.2 0.00014086415 0.1152 AML other m 2021-08-23T14:17:21.30
IV.STAL.HNN. ML:1.3 0.00017648964 0.1024 AML other m 2021-08-23T14:17:21.24
NI.VINO.HHE. ML:0.5 1.269421E-5 1.12 AML other m 2021-08-23T14:17:20.89
NI.VINO.HHN. ML:0.5 1.736652E-5 0.6784 AML other m 2021-08-23T14:17:23.20
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