Earthquake (quarry blast) with magnitude of ML 0.9 on date 21-12-2020 and time 10:16:20 (UTC) in region 4 km E Genga (AN)

A magnitude ML 0.9 (quarry blast) earthquake occured in region: 4 km E Genga (AN), on

  • 21-12-2020 10:16:20 (UTC)
  • 21-12-2020 11:16:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.414, 12.98 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.

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 4 1797 1797
Serra San Quirico AN 5 2850 4647
Mergo AN 8 1037 5684
Poggio San Vicino MC 9 246 5930
Sassoferrato AN 10 7285 13215
Arcevia AN 10 4612 17827
Cerreto d'Esi AN 10 3817 21644
Fabriano AN 10 31480 53124
Rosora AN 11 1985 55109
Cupramontana AN 12 4756 59865
Castelplanio AN 12 3540 63405
Apiro MC 13 2280 65685
Maiolati Spontini AN 13 6248 71933
Poggio San Marcello AN 14 693 72626
Montecarotto AN 14 1987 74613
Monte Roberto AN 15 3061 77674
Serra de' Conti AN 15 3746 81420
Castelbellino AN 16 4947 86367
San Paolo di Jesi AN 16 933 87300
Staffolo AN 17 2253 89553
Matelica MC 18 9981 99534
Esanatoglia MC 18 2034 101568
Serra Sant'Abbondio PU 19 1027 102595
Barbara AN 19 1368 103963
Cingoli MC 20 10352 114315

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km S of Fano (60888 inhabitants)
49 Km W of Ancona (100861 inhabitants)
56 Km S of Pesaro (94582 inhabitants)
56 Km NE of Foligno (57155 inhabitants)
59 Km NE of Perugia (166134 inhabitants)
79 Km SE of Rimini (147750 inhabitants)
89 Km E of Arezzo (99543 inhabitants)
99 Km N of Terni (111501 inhabitants)
100 Km SE of Cesena (96758 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 2020-12-21
10:16:20
43.4138 12.9798 1 2021-02-26
14:56:17
Bollettino Sismico Italiano INGV 86638071
Reviewed
Rev100
ML 1.0 2020-12-21
10:16:19
43.445 13.0152 5 2020-12-21
10:25:50
Sala Sismica INGV-Roma 85597531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-21 10:16:20 ± 0.14
Latitude 43.4138 ± 0.0090
Longitude 12.9798 ± 0.0149
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 86638071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1320
Semi-minor axis of confidence ellipse (meter) 780
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 238
Circular confidence region, given by single value of horizontal uncertainty (meter) 1320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.03058
Epicentral distance of station farthest from the epicenter (degree) 0.38491
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 6
Type of magnitude ML
Reference to an origin 86638071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-27 19:39:13

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 85597531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-21 10:25:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2020-12-21T10:16:28.27 0.3 undecidable manual P 168 0.3849 91 -0.39 65
IV.CSP1.EHZ. 2020-12-21T10:16:27.91 0.3 undecidable manual P 153 0.3615 91 -0.22 68
IV.MPAG.EHZ. 2020-12-21T10:16:25.64 0.3 undecidable manual P 324 0.268 91 -0.41 66
IV.EL6.EHZ. 2020-12-21T10:16:23.14 0.3 undecidable manual P 134 0.1223 92 0.32 69
IV.SSFR.HHZ. 2020-12-21T10:16:23.82 0.3 undecidable manual P 279 0.1448 92 0.5 67
IV.CING.HHE. 2020-12-21T10:16:23.88 0.3 undecidable manual P 104 0.161 92 0.2 71
IV.ARVD.HHZ. 2020-12-21T10:16:22.08 0.3 undecidable manual P 342 0.089 93 0.01 75
IV.MMUR.HNZ. 2020-12-21T10:16:20.75 0.1 undecidable manual P 24 0.0306 98 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMUR.HNN. ML:0 0.0056106045 0.0896 AML other m 2020-12-21T10:16:21.03
IV.MMUR.HNE. ML:0 0.0057217055 0.2496 AML other m 2020-12-21T10:16:21.70
IV.ARVD.HHN. ML:0 0.00015447388 1.7632 AML other m 2020-12-21T10:16:24.93
IV.SSFR.HNN. ML:1.2 0.000155552585 0.0576 AML other m 2020-12-21T10:16:27.58
IV.SSFR.HHN. ML:1 0.00010488505 0.0576 AML other m 2020-12-21T10:16:27.58
IV.SSFR.HNE. ML:1.1 0.000134772635 0.1344 AML other m 2020-12-21T10:16:27.70
IV.SSFR.HHE. ML:1 0.00010606877 0.1216 AML other m 2020-12-21T10:16:27.63
IV.FDMO.HHN. ML:0.5 1.17349535E-5 0.4224 AML other m 2020-12-21T10:16:35.72
IV.FDMO.HHE. ML:0.5 1.1490112E-5 0.1216 AML other m 2020-12-21T10:16:37.40
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