Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.0 on date 26-04-2021 and time 17:09:31 (Italy) in region 2 km W Albiano (TN)

A magnitude ML 1.0 (quarry blast) earthquake occured in region: 2 km W Albiano (TN), on

  • 26-04-2021 15:09:31 (UTC)
  • 26-04-2021 17:09:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.1480, 11.1730 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 2 1514 1514
Giovo TN 2 2513 4027
Lona-Lases TN 4 890 4917
Fornace TN 4 1355 6272
Lavis TN 5 8915 15187
Cembra Lisignago TN 5 2364 17551
Faedo TN 5 616 18167
Nave San Rocco TN 5 1398 19565
San Michele all'Adige TN 6 3042 22607
Baselga di Pinè TN 6 5031 27638
Zambana TN 6 1733 29371
Civezzano TN 6 4002 33373
Altavalle TN 6 1648 35021
Segonzano TN 8 1505 36526
Fai della Paganella TN 9 894 37420
Mezzocorona TN 9 5446 42866
Trento TN 10 117317 160183
Mezzolombardo TN 10 7067 167250
Bedollo TN 10 1483 168733
Salorno BZ 11 3758 172491
Pergine Valsugana TN 11 21280 193771
Sant'Orsola Terme TN 11 1098 194869
Frassilongo TN 12 338 195207
Roverè della Luna TN 12 1636 196843
Cavedago TN 12 517 197360
Fierozzo TN 12 469 197829
Spormaggiore TN 12 1289 199118
Andalo TN 13 1076 200194
Sover TN 14 838 201032
Palù del Fersina TN 14 173 201205
Vignola-Falesina TN 14 162 201367
Cortina sulla strada del vino BZ 14 642 202009
Ton TN 15 1338 203347
Sporminore TN 15 700 204047
Vallelaghi TN 15 5044 209091
Molveno TN 16 1134 210225
Magrè sulla strada del vino BZ 16 1279 211504
Altopiano della Vigolana TN 16 4942 216446
Campodenno TN 16 1500 217946
Tenna TN 16 993 218939
Calceranica al Lago TN 17 1387 220326
Denno TN 17 1297 221623
Garniga Terme TN 17 388 222011
Valfloriana TN 17 504 222515
Levico Terme TN 18 7915 230430
Capriana TN 18 588 231018
Caldonazzo TN 19 3631 234649
Contà TN 19 1454 236103
Cortaccia sulla strada del vino BZ 19 2225 238328
Madruzzo TN 20 2884 241212
Aldeno TN 20 3059 244271

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km NE of Trento (117317 inhabitants)
42 Km SW of Bolzano (106441 inhabitants)
73 Km NW of Vicenza (112953 inhabitants)
80 Km N of Verona (258765 inhabitants)
99 Km NW of Treviso (83731 inhabitants)
99 Km NW of Padova (210401 inhabitants)
100 Km NE of Brescia (196480 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 1.0 2021-04-26
15:09:31		 46.1478 11.1728 1 2021-07-12
16:55:16		 Bollettino Sismico Italiano INGV 91898401
Reviewed
Rev100 		ML 1.1 2021-04-26
15:09:31		 46.147 11.1957 8 2021-04-26
15:14:54		 Sala Sismica INGV-Roma 89493611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-26 15:09:31 ± 0.14
Latitude 46.1478 ± 0.0081
Longitude 11.1728 ± 0.0130
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 91898401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1040
Semi-minor axis of confidence ellipse (meter) 850
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 307
Circular confidence region, given by single value of horizontal uncertainty (meter) 1040.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.14839
Epicentral distance of station farthest from the epicenter (degree) 0.67269
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 91898401
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-26 00:22:34

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 89493611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-26 15:14:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRES.EHE. 2021-04-26T15:09:45.61 0.1 undecidable manual P 35 74.6697 50 -0.47 84
IV.MAGA.HHZ. 2021-04-26T15:09:43.28 0.3 undecidable manual P 226 58.8966 90 -0.33 67
IV.MBAL.EHZ. 2021-04-26T15:09:42.17 0.3 undecidable manual P 206 55.5 91 -0.76 58
IV.MABI.HHZ. 2021-04-26T15:09:41.78 0.3 undecidable manual P 259 51.7038 91 -0.38 67
ST.RONC.EHZ. 2021-04-26T15:09:40.92 0.3 undecidable manual P 246 46.2204 91 -0.15 71
ST.VARA.EHZ. 2021-04-26T15:09:40.07 0.3 undecidable manual P 211 41.625 91 -0.07 73
IV.APPI.EHE. 2021-04-26T15:09:39.36 0.3 undecidable manual P 7 36.9297 91 0.15 72
IV.CTI.HHE. 2021-04-26T15:09:39.32 0.3 undecidable manual P 107 38.3283 91 -0.16 72
ST.OZOL.EHE. 2021-04-26T15:09:38.04 0.3 undecidable manual P 342 29.8479 91 0.25 72
ST.DOSS.HHZ. 2021-04-26T15:09:37.77 0.1 undecidable manual P 178 29.6481 91 0.02 100
SI.LUSI.HHZ. 2021-04-26T15:09:37.59 0.1 positive manual P 220 27.3504 91 0.3 95
ST.GAGG.HHZ. 2021-04-26T15:09:36.07 0.1 positive manual P 247 17.9709 92 0.67 86
ST.PANI.EHE. 2021-04-26T15:09:35.56 0.1 undecidable manual P 131 16.4724 92 0.45 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
ST.GAGG.HHN. ML:1.0 0.00008545 0.94 AML other m 2021-04-26T15:09:40.21
ST.GAGG.HHE. ML:1.1 0.0001255 0.54 AML other m 2021-04-26T15:09:42.27
ST.DOSS.HHN. ML:1.0 0.0000485 0.4 AML other m 2021-04-26T15:09:42.50
SI.LUSI.HHN. ML:1.4 0.00015050000000000003 1.78 AML other m 2021-04-26T15:09:42.07
SI.LUSI.HHE. ML:1.3 0.0001079 0.3 AML other m 2021-04-26T15:09:43.06
ST.DOSS.HHE. ML:1.1 0.00006085 1 AML other m 2021-04-26T15:09:46.32
IV.MABI.HHE. ML:0.6 0.00000969 0.46 AML other m 2021-04-26T15:09:51.37
IV.MABI.HHN. ML:0.8 0.0000152 0.44 AML other m 2021-04-26T15:09:51.66
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