Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.2 on date 31-08-2021 and time 11:03:37 (Italy) in region 6 km SE Genga (AN)

A magnitude ML 1.2 (quarry blast) earthquake occured in region: 6 km SE Genga (AN), on

  • 31-08-2021 09:03:37 (UTC)
  • 31-08-2021 11:03:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3820, 12.9720 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Genga AN 6 1797 1797
Cerreto d'Esi AN 7 3817 5614
Fabriano AN 7 31480 37094
Serra San Quirico AN 8 2850 39944
Poggio San Vicino MC 9 246 40190
Sassoferrato AN 11 7285 47475
Mergo AN 11 1037 48512
Apiro MC 13 2280 50792
Arcevia AN 13 4612 55404
Cupramontana AN 14 4756 60160
Rosora AN 14 1985 62145
Matelica MC 14 9981 72126
Esanatoglia MC 15 2034 74160
Castelplanio AN 15 3540 77700
Maiolati Spontini AN 16 6248 83948
Poggio San Marcello AN 17 693 84641
Monte Roberto AN 18 3061 87702
Gagliole MC 18 620 88322
Montecarotto AN 18 1987 90309
Staffolo AN 18 2253 92562
San Paolo di Jesi AN 18 933 93495
Castelbellino AN 19 4947 98442
Serra de' Conti AN 19 3746 102188
Sigillo PG 19 2404 104592
Fossato di Vico PG 20 2840 107432
Cingoli MC 20 10352 117784

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km SW of Ancona (100861 inhabitants)
52 Km S of Fano (60888 inhabitants)
52 Km NE of Foligno (57155 inhabitants)
56 Km NE of Perugia (166134 inhabitants)
59 Km S of Pesaro (94582 inhabitants)
82 Km SE of Rimini (147750 inhabitants)
88 Km E of Arezzo (99543 inhabitants)
95 Km N of Terni (111501 inhabitants)
100 Km NW of Teramo (54892 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 1.2 2021-08-31
09:03:37		 43.3822 12.9717 1 2021-12-29
11:12:53		 Bollettino Sismico Italiano INGV 98501911
Reviewed
Rev100 		ML 1.2 2021-08-31
09:03:37		 43.4008 12.9915 8 2021-08-31
09:10:10		 Sala Sismica INGV-Roma 94859581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-31 09:03:37 ± 0.09
Latitude 43.3822 ± 0.0054
Longitude 12.9717 ± 0.0087
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 98501911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 770
Semi-minor axis of confidence ellipse (meter) 520
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 230
Circular confidence region, given by single value of horizontal uncertainty (meter) 770.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41009
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 98501911
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-14 10:53:42

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 94859581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-31 09:10:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2021-08-31T09:04:03.15 3.0 undecidable manual S 0.52 0
IV.BRSN.EHZ. 2021-08-31T09:03:56.38 3.0 undecidable manual P -2.11 0
IV.ATVO.HHZ. 2021-08-31T09:03:46.27 0.3 undecidable manual P 270 45.5211 91 0 72
IV.MURB.HHZ. 2021-08-31T09:03:45.27 0.3 undecidable manual P 250 38.4282 91 0.43 66
IV.CSP1.EHZ. 2021-08-31T09:03:44.09 0.3 undecidable manual P 150 37.3293 91 -0.53 65
IV.NARO.HHZ. 2021-08-31T09:03:44.86 0.3 undecidable manual P 309 40.4262 91 -0.39 67
IV.FDMO.HHZ. 2021-08-31T09:03:44.80 0.1 undecidable manual P 166 39.4272 91 -0.25 92
IV.MPAG.EHZ. 2021-08-31T09:03:43.38 0.3 undecidable manual P 328 32.2455 91 -0.24 70
IV.MML1.EHZ. 2021-08-31T09:03:43.34 0.3 undecidable manual P 180 29.8479 91 0.22 70
IV.FRON.EHZ. 2021-08-31T09:03:42.27 0.1 undecidable manual P 307 24.8529 91 0.14 96
IV.CING.HHZ. 2021-08-31T09:03:40.86 0.1 undecidable manual P 92 18.0708 92 0.09 98
IV.ARVD.HHZ. 2021-08-31T09:03:39.83 0.1 undecidable manual P 349 13.0758 92 0.06 100
IV.EL6.EHZ. 2021-08-31T09:03:39.82 0.1 undecidable manual P 119 11.9769 92 0.26 96
IV.MMUR.HNZ. 2021-08-31T09:03:38.57 0.3 undecidable manual P 17 6.993 94 0.03 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARVD.HHN. ML:1.0 0.00013550000000000001 0.4 AML other m 2021-08-31T09:03:43.22
IV.EL6.EHE. ML:1.4 0.000391 0.34 AML other m 2021-08-31T09:03:43.87
IV.CING.HHE. ML:1.1 0.00011499999999999999 1.74 AML other m 2021-08-31T09:03:43.12
IV.ARVD.HHE. ML:1.1 0.000166 1.1 AML other m 2021-08-31T09:03:44.74
IV.EL6.EHN. ML:1.4 0.000398 0.84 AML other m 2021-08-31T09:03:44.43
IV.CING.HHN. ML:1.1 0.000132 0.5 AML other m 2021-08-31T09:03:44.67
IV.FRON.EHN. ML:1.1 0.0000775 0.3 AML other m 2021-08-31T09:03:47.12
IV.FRON.EHE. ML:0.9 0.0000505 0.24 AML other m 2021-08-31T09:03:49.23
IV.MML1.EHE. ML:1.2 0.0000859 0.28 AML other m 2021-08-31T09:03:49.43
IV.COR1.EHN. ML:1.5 0.00019075 0.52 AML other m 2021-08-31T09:03:49.99
IV.MML1.EHN. ML:1.0 0.00005434999999999999 1.26 AML other m 2021-08-31T09:03:51.13
IV.MPAG.EHN. ML:0.9 0.00003585 0.7 AML other m 2021-08-31T09:03:51.11
IV.ATFO.HHE. ML:1.1 0.00005895 1.24 AML other m 2021-08-31T09:03:52.31
IV.FDMO.HHE. ML:1.3 0.0000788 0.14 AML other m 2021-08-31T09:03:52.38
IV.MPAG.EHE. ML:0.8 0.00002785 0.48 AML other m 2021-08-31T09:03:52.46
IV.CSP1.EHN. ML:1.5 0.000121 0.36 AML other m 2021-08-31T09:03:52.64
IV.ATFO.HHN. ML:1.1 0.0000532 0.56 AML other m 2021-08-31T09:03:52.47
IV.FDMO.HHN. ML:1.2 0.000059999999999999995 1.46 AML other m 2021-08-31T09:03:52.17
IV.NARO.HHE. ML:0.8 0.000026799999999999998 1.1 AML other m 2021-08-31T09:03:53.02
IV.MURB.HHE. ML:1.6 0.0001605 0.6 AML other m 2021-08-31T09:03:53.40
IV.CSP1.EHE. ML:1.5 0.00011605 1.32 AML other m 2021-08-31T09:03:53.71
IV.COR1.EHE. ML:1.2 0.0000877 0.46 AML other m 2021-08-31T09:03:53.76
IV.NARO.HHN. ML:0.8 0.000024399999999999997 0.5 AML other m 2021-08-31T09:03:54.41
IV.MURB.HHN. ML:1.7 0.0001875 0.9 AML other m 2021-08-31T09:03:54.02
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