Earthquake with magnitude of ML 0.9 on date 19-08-2021 and time 01:44:21 (Italy) in region 2 km SE Chies d'Alpago (BL)

A magnitude ML 0.9 earthquake occured in region: 2 km SE Chies d'Alpago (BL), on

  • 18-08-2021 23:44:21 (UTC)
  • 19-08-2021 01:44:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.1630, 12.4050 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Chies d'Alpago BL 2 1377 1377
Tambre BL 4 1371 2748
Alpago BL 4 6994 9742
Ponte nelle Alpi BL 8 8363 18105
Soverzene BL 9 389 18494
Barcis PN 12 256 18750
Erto e Casso PN 13 387 19137
Cimolais PN 14 397 19534
Claut PN 14 956 20490
Longarone BL 14 5359 25849
Belluno BL 15 35870 61719
Polcenigo PN 16 3163 64882
Budoia PN 17 2569 67451
Andreis PN 17 259 67710
Aviano PN 18 9106 76816
Fregona TV 18 3013 79829
Limana BL 19 5209 85038
Montereale Valcellina PN 19 4433 89471
Ospitale di Cadore BL 20 292 89763

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of Pordenone (51229 inhabitants)
56 Km N of Treviso (83731 inhabitants)
65 Km W of Udine (99169 inhabitants)
81 Km N of Venezia (263352 inhabitants)
89 Km E of Bolzano (106441 inhabitants)
93 Km NE of Padova (210401 inhabitants)
95 Km NE of Vicenza (112953 inhabitants)
99 Km E of Trento (117317 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 0.9 2021-08-18
23:44:21
46.1627 12.4052 11 2021-12-29
11:12:28
Bollettino Sismico Italiano INGV 95235851
Reviewed
Rev100
ML 0.9 2021-08-18
23:44:21
46.1632 12.4032 11 2021-08-18
23:51:57
Sala Sismica INGV-Roma 94350591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-18 23:44:21 ± 0.05
Latitude 46.1627 ± 0.0027
Longitude 12.4052 ± 0.0039
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95235851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 329
Semi-minor axis of confidence ellipse (meter) 309
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 146
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
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) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.27519
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 94350591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-18 23:51:57

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 95235851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-09 13:33:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OX.VARN.HHZ. 2021-08-18T23:44:31.67 0.6 undecidable manual S 231 29.8479 50 -0.14 48
OX.AGOR.HNZ. 2021-08-18T23:44:31.85 0.3 undecidable manual S 296 30.5472 50 -0.15 72
IV.STAL.HHZ. 2021-08-18T23:44:30.59 0.3 undecidable manual S 65 25.752 50 -0.14 73
OX.CAE.HHZ. 2021-08-18T23:44:28.29 0.3 undecidable manual S 172 17.2716 122 -0.05 75
IV.FREG.EHZ. 2021-08-18T23:44:28.51 0.6 undecidable manual S 203 18.2706 120 -0.14 49
OX.MLN.HHZ. 2021-08-18T23:44:27.99 0.3 undecidable manual S 95 16.2726 123 -0.05 75
OX.AGOR.HNZ. 2021-08-18T23:44:27.73 0.1 undecidable manual P 296 30.5472 50 0.25 94
OX.CIMO.HHZ. 2021-08-18T23:44:27.88 0.3 undecidable manual S 10 16.7721 122 -0.33 71
OX.VARN.HHZ. 2021-08-18T23:44:27.18 0.3 undecidable manual P 231 29.8479 50 -0.19 72
IV.STAL.HHZ. 2021-08-18T23:44:27.07 0.3 undecidable manual P 65 25.752 50 0.32 70
IV.FREG.EHZ. 2021-08-18T23:44:25.54 0.3 undecidable manual P 203 18.2706 120 0 76
IT.PNAL.HNZ. 2021-08-18T23:44:25.97 0.3 undecidable manual S 278 8.2806 142 -0.02 77
OX.MLN.HHZ. 2021-08-18T23:44:25.28 0.1 undecidable manual P 95 16.2726 123 0.09 100
OX.CAE.HHZ. 2021-08-18T23:44:25.39 0.3 undecidable manual P 172 17.2716 122 0.02 76
OX.CIMO.HHZ. 2021-08-18T23:44:25.32 0.3 undecidable manual P 10 16.7721 122 0.03 76
IT.PNAL.HNZ. 2021-08-18T23:44:24.28 0.1 undecidable manual P 278 8.2806 142 0.27 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OX.CIMO.HHN. ML:0.7 0.00004575 1.78 AML other m 2021-08-18T23:44:27.96
OX.CIMO.HHE. ML:0.8 0.000060049999999999996 1.66 AML other m 2021-08-18T23:44:28.09
OX.CAE.HHN. ML:0.7 0.000042050000000000006 0.64 AML other m 2021-08-18T23:44:28.42
OX.CAE.HHE. ML:1.0 0.0000759 1.14 AML other m 2021-08-18T23:44:29.00
IV.FREG.EHE. ML:1.0 0.00007285 1.12 AML other m 2021-08-18T23:44:30.90
IV.FREG.EHN. ML:0.9 0.00006560000000000001 0.42 AML other m 2021-08-18T23:44:32.33
OX.VARN.HHE. ML:0.9 0.0000419 1.28 AML other m 2021-08-18T23:44:32.97
OX.VARN.HHN. ML:0.8 0.0000313 0.82 AML other m 2021-08-18T23:44:33.63
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