Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 0.7 on date 20-05-2021 and time 18:36:20 (Italy) in region 1 km S Albiano (TN)

A magnitude ML 0.7 (quarry blast) earthquake occured in region: 1 km S Albiano (TN), on

  • 20-05-2021 16:36:20 (UTC)
  • 20-05-2021 18:36:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.1400, 11.1950 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Albiano TN 1 1514 1514
Lona-Lases TN 2 890 2404
Fornace TN 3 1355 3759
Giovo TN 4 2513 6272
Baselga di Pinè TN 4 5031 11303
Cembra Lisignago TN 5 2364 13667
Civezzano TN 6 4002 17669
Altavalle TN 6 1648 19317
Lavis TN 6 8915 28232
Faedo TN 6 616 28848
Nave San Rocco TN 7 1398 30246
San Michele all'Adige TN 8 3042 33288
Segonzano TN 8 1505 34793
Zambana TN 8 1733 36526
Bedollo TN 9 1483 38009
Sant'Orsola Terme TN 9 1098 39107
Pergine Valsugana TN 10 21280 60387
Frassilongo TN 10 338 60725
Trento TN 10 117317 178042
Fierozzo TN 10 469 178511
Mezzocorona TN 10 5446 183957
Fai della Paganella TN 11 894 184851
Salorno BZ 11 3758 188609
Mezzolombardo TN 12 7067 195676
Palù del Fersina TN 12 173 195849
Roverè della Luna TN 12 1636 197485
Vignola-Falesina TN 13 162 197647
Sover TN 13 838 198485
Cavedago TN 14 517 199002
Spormaggiore TN 14 1289 200291
Cortina sulla strada del vino BZ 15 642 200933
Altopiano della Vigolana TN 15 4942 205875
Andalo TN 15 1076 206951
Tenna TN 15 993 207944
Calceranica al Lago TN 16 1387 209331
Ton TN 16 1338 210669
Magrè sulla strada del vino BZ 16 1279 211948
Levico Terme TN 17 7915 219863
Vallelaghi TN 17 5044 224907
Sporminore TN 17 700 225607
Valfloriana TN 17 504 226111
Garniga Terme TN 17 388 226499
Caldonazzo TN 17 3631 230130
Molveno TN 18 1134 231264
Capriana TN 18 588 231852
Campodenno TN 18 1500 233352
Novaledo TN 19 1076 234428
Denno TN 19 1297 235725
Roncegno Terme TN 19 2879 238604
Cortaccia sulla strada del vino BZ 19 2225 240829
Aldeno TN 20 3059 243888

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km NE of Trento (117317 inhabitants)
42 Km SW of Bolzano (106441 inhabitants)
71 Km NW of Vicenza (112953 inhabitants)
80 Km N of Verona (258765 inhabitants)
97 Km NW of Treviso (83731 inhabitants)
97 Km NW of Padova (210401 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 0.7 2021-05-20
16:36:20		 46.1405 11.1953 1 2021-12-29
11:12:16		 Bollettino Sismico Italiano INGV 93580521
Reviewed
Rev100 		ML 0.7 2021-05-20
16:36:21		 46.1232 11.2043 10 2021-05-20
16:47:14		 Sala Sismica INGV-Roma 90299311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-20 16:36:20 ± 0.12
Latitude 46.1405 ± 0.0090
Longitude 11.1953 ± 0.0156
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 93580521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1320
Semi-minor axis of confidence ellipse (meter) 730
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 304
Circular confidence region, given by single value of horizontal uncertainty (meter) 1320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.66999
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 93580521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-02 23:13:25

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 90299311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-20 16:47:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAPR.HNZ. 2021-05-20T16:36:39.00 3.0 undecidable manual P -1.4 0
IV.BRES.EHE. 2021-05-20T16:36:34.70 0.3 undecidable manual P 33 74.37 50 -0.41 65
SI.ABSI.HHE. 2021-05-20T16:36:33.31 0.3 undecidable manual P 8 65.8896 50 -0.5 65
IV.MBAL.EHZ. 2021-05-20T16:36:31.32 0.1 undecidable manual P 208 55.5999 91 -0.69 82
SI.KOSI.HHZ. 2021-05-20T16:36:28.69 0.1 undecidable manual P 21 38.4282 91 0.12 98
IV.APPI.EHE. 2021-05-20T16:36:28.50 0.3 undecidable manual P 4 37.629 91 0.1 74
IV.CTI.HHZ. 2021-05-20T16:36:28.28 0.3 undecidable manual P 106 36.4413 91 0.11 74
ST.ZIAN.EHZ. 2021-05-20T16:36:27.51 0.1 undecidable manual P 62 32.0457 91 0.23 97
SI.LUSI.HHZ. 2021-05-20T16:36:26.59 0.1 undecidable manual P 224 27.9498 91 0.13 100
ST.DOSS.HHZ. 2021-05-20T16:36:26.78 0.1 undecidable manual P 181 28.8489 91 0.14 100
ST.GAGG.HHZ. 2021-05-20T16:36:25.12 0.1 undecidable manual P 251 19.2696 91 0.39 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
ST.ZIAN.HNE. ML:0.5 0.000015491535 0.224 AML other m 2021-05-20T16:36:04.87
ST.GAGG.HHN. ML:0.2 0.000017443121 0.3456 AML other m 2021-05-20T16:36:28.38
SI.KOSI.HHE. ML:0.7 0.000021171244999999998 0.7808 AML other m 2021-05-20T16:36:28.20
ST.GAGG.HHE. ML:0.4 0.000026301289999999998 0.1664 AML other m 2021-05-20T16:36:28.60
ST.GAGG.HNN. ML:0.8 0.00005038175 0.576 AML other m 2021-05-20T16:36:29.63
ST.DOSS.HNN. ML:1.2 0.00008066522500000001 1.1296 AML other m 2021-05-20T16:36:30.83
SI.LUSI.HHE. ML:0.7 0.000030836985 0.32 AML other m 2021-05-20T16:36:31.68
SI.LUSI.HHN. ML:0.9 0.000044673085 0.2688 AML other m 2021-05-20T16:36:32.25
ST.ZIAN.EHE. ML:0.5 0.000013294809500000001 0.2816 AML other m 2021-05-20T16:36:33.56
ST.DOSS.HHN. ML:0.7 0.000026665084 0.4096 AML other m 2021-05-20T16:36:34.22
ST.DOSS.HHE. ML:0.4 0.000016135565 0.256 AML other m 2021-05-20T16:36:34.58
IV.MBAL.EHE. ML:1.0 0.000024322705 0.4224 AML other m 2021-05-20T16:36:35.38
IV.CTI.HHN. ML:0.6 0.000013423020000000001 0.1792 AML other m 2021-05-20T16:36:35.47
ST.GAGG.HNE. ML:0.7 0.000045046128500000004 1.4624 AML other m 2021-05-20T16:36:36.06
ST.DOSS.HNE. ML:1.0 0.000060418924 1.5136 AML other m 2021-05-20T16:36:36.18
IV.MBAL.EHN. ML:0.9 0.0000218800285 0.064 AML other m 2021-05-20T16:36:39.86
IV.MBAL.HNN. ML:1.9 0.0001691155 0.6016 AML other m 2021-05-20T16:36:40.13
ST.ZIAN.EHN. ML:0.3 0.0000096421745 1.6544 AML other m 2021-05-20T16:36:40.16
SI.KOSI.HHN. ML:0.6 0.0000169534575 0.3456 AML other m 2021-05-20T16:36:41.16
IV.CTI.HHE. ML:0.4 0.00001233615 0.2432 AML other m 2021-05-20T16:36:41.71
ST.ZIAN.HNN. ML:1.2 0.00008188975500000001 1.0912 AML other m 2021-05-20T16:36:41.32
IV.MBAL.HNE. ML:1.8 0.000149606445 0.6912 AML other m 2021-05-20T16:36:42.36
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