Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 0.8 on date 07-12-2021 and time 07:57:24 (UTC) in region 4 km S Cagli (PU)

A magnitude ML 0.8 (quarry blast) earthquake occured in region: 4 km S Cagli (PU), on

  • 07-12-2021 07:57:24 (UTC)
  • 07-12-2021 08:57:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5090, 12.6610 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
Cagli PU 4 8731 8731
Cantiano PU 5 2245 10976
Frontone PU 6 1300 12276
Serra Sant'Abbondio PU 9 1027 13303
Scheggia e Pascelupo PG 12 1393 14696
Acqualagna PU 12 4393 19089
Piobbico PU 15 2029 21118
Pergola PU 16 6333 27451
Costacciaro PG 17 1216 28667
Sassoferrato AN 18 7285 35952
Gubbio PG 18 32216 68168
Fermignano PU 19 8596 76764
Pietralunga PG 19 2111 78875

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km SW of Fano (60888 inhabitants)
49 Km SW of Pesaro (94582 inhabitants)
50 Km NE of Perugia (166134 inhabitants)
62 Km N of Foligno (57155 inhabitants)
62 Km S of Rimini (147750 inhabitants)
63 Km E of Arezzo (99543 inhabitants)
70 Km W of Ancona (100861 inhabitants)
78 Km SE of Cesena (96758 inhabitants)
94 Km SE of Forlì (117913 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 0.8 2021-12-07
07:57:24		 43.5087 12.6608 1 2022-03-30
13:04:25		 Bollettino Sismico Italiano INGV 99274611
Reviewed
Rev100 		ML 0.9 2021-12-07
07:57:23		 43.5183 12.6587 8 2021-12-07
08:04:32		 Sala Sismica INGV-Roma 98229781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-07 07:57:24 ± 0.07
Latitude 43.5087 ± 0.0045
Longitude 12.6608 ± 0.0050
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 99274611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 520
Semi-minor axis of confidence ellipse (meter) 390
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 356
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.36692
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 99274611
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-03 08:54:59

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 98229781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-07 08:04:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-12-07T07:57:31.93 0.3 undecidable manual P 119 40.7259 91 -0.56 84
IV.SNTG.HHZ. 2021-12-07T07:57:31.24 0.3 undecidable manual P 141 36.0417 91 -0.32 91
IV.ATLO.HNZ. 2021-12-07T07:57:30.14 0.3 undecidable manual P 224 29.6481 91 -0.13 95
IV.MURB.HHZ. 2021-12-07T07:57:30.22 0.3 undecidable manual P 202 29.3484 91 0 98
IV.FOSV.HNZ. 2021-12-07T07:57:29.28 0.3 undecidable manual P 161 25.0527 91 -0.08 97
IV.TB02.DHZ.01 2021-12-07T07:57:29.63 0.3 undecidable manual P 233 25.3524 91 0.2 95
IV.ATVO.HHZ. 2021-12-07T07:57:29.15 0.3 undecidable manual P 236 24.8529 91 -0.16 96
IV.TB03.DHZ.01 2021-12-07T07:57:29.35 0.3 undecidable manual P 240 23.4543 91 0.32 93
IV.ARVD.HHZ. 2021-12-07T07:57:28.98 0.3 undecidable manual P 93 22.6551 91 0.11 97
IV.ATPI.EHZ. 2021-12-07T07:57:28.62 0.3 undecidable manual P 253 21.7671 91 -0.08 98
IV.ATFO.HHZ. 2021-12-07T07:57:28.00 0.3 undecidable manual P 205 17.2716 92 0.19 96
IV.ATPC.HHZ. 2021-12-07T07:57:27.79 0.3 undecidable manual P 259 16.6722 92 0.11 98
IV.MPAG.EHZ. 2021-12-07T07:57:27.61 0.3 undecidable manual P 31 15.5733 92 0.16 97
IV.SSFR.HHZ. 2021-12-07T07:57:27.00 0.3 undecidable manual P 129 12.6762 92 0.13 98
IV.ATSC.EHZ. 2021-12-07T07:57:26.33 0.3 undecidable manual P 168 9.5793 93 0.07 100
IV.NARO.HHZ. 2021-12-07T07:57:26.74 0.3 undecidable manual P 330 13.0758 92 -0.21 97
IV.PIEI.HHZ. 2021-12-07T07:57:26.11 0.3 undecidable manual P 287 10.5783 93 -0.34 94
IV.ATBU.HNZ. 2021-12-07T07:57:26.43 0.3 undecidable manual P 248 9.7791 93 0.14 99
IV.FRON.EHZ. 2021-12-07T07:57:25.78 0.3 undecidable manual P 79 5.2947 95 0.37 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PIEI.HNN. ML:0.6 0.000063102801 0.1088 AML other m 2021-12-07T07:57:27.81
IV.PIEI.HHE. ML:0.9 0.0001525 1.16 AML other m 2021-12-07T07:57:27.25
IV.PIEI.HNE. ML:0.7 0.00009400537 1.9232 AML other m 2021-12-07T07:57:28.00
IV.PIEI.HHN. ML:0.6 0.0000781 0.56 AML other m 2021-12-07T07:57:28.77
IV.NARO.HHN. ML:0.5 0.000038835337000000005 0.0576 AML other m 2021-12-07T07:57:29.63
IV.NARO.HHE. ML:0.6 0.00005735750000000001 0.0576 AML other m 2021-12-07T07:57:29.70
IV.SSFR.HHN. ML:1.1 0.000177 0.32 AML other m 2021-12-07T07:57:30.16
IV.SSFR.HNN. ML:1.4 0.00032199999999999997 0.98 AML other m 2021-12-07T07:57:30.17
IV.SSFR.HHE. ML:1.1 0.000184 0.82 AML other m 2021-12-07T07:57:30.65
IV.SSFR.HNE. ML:1.3 0.0003115 0.46 AML other m 2021-12-07T07:57:31.45
IV.ATFO.HHN. ML:0.5 0.00003658213 0.1152 AML other m 2021-12-07T07:57:31.44
IV.ATFO.HHE. ML:0.7 0.000048137579999999997 0.2816 AML other m 2021-12-07T07:57:31.56
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