Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 0.6 on date 21-09-2020 and time 06:24:47 (UTC) in region 4 km S Cagli (PU)

A magnitude ML 0.6 (quarry blast) earthquake occured in region: 4 km S Cagli (PU), on

  • 21-09-2020 06:24:47 (UTC)
  • 21-09-2020 08:24:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5140, 12.6470 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 8 1300 12276
Serra Sant'Abbondio PU 10 1027 13303
Acqualagna PU 12 4393 17696
Scheggia e Pascelupo PG 12 1393 19089
Piobbico PU 14 2029 21118
Pergola PU 16 6333 27451
Costacciaro PG 18 1216 28667
Fermignano PU 18 8596 37263
Pietralunga PG 19 2111 39374
Gubbio PG 19 32216 71590
Apecchio PU 19 1882 73472
Sassoferrato AN 19 7285 80757
Urbania PU 20 7099 87856

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)
61 Km S of Rimini (147750 inhabitants)
62 Km E of Arezzo (99543 inhabitants)
62 Km N of Foligno (57155 inhabitants)
71 Km W of Ancona (100861 inhabitants)
77 Km SE of Cesena (96758 inhabitants)
93 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 0.6 2020-09-21
06:24:47		 43.5143 12.6467 1 2021-02-26
14:56:10		 Bollettino Sismico Italiano INGV 85446271
Reviewed
Rev100 		ML 0.7 2020-09-21
06:24:46		 43.5192 12.653 7 2020-09-21
06:35:17		 Sala Sismica INGV-Roma 83091371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-21 06:24:47 ± 0.06
Latitude 43.5143 ± 0.0045
Longitude 12.6467 ± 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 85446271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 530
Semi-minor axis of confidence ellipse (meter) 370
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 339
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
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 17
Number of defining phases 17
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) 0.05756
Epicentral distance of station farthest from the epicenter (degree) 0.32466
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.4
Num. used stations 18
Type of magnitude ML
Reference to an origin 85446271
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-15 13:35:31

ML:0.7

Field Value
Value 0.7
Uncertainty 0.4
Num. used stations 18
Type of magnitude ML
Reference to an origin 83091371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-21 06:35:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MURB.HHZ. 2020-09-21T06:24:53.07 0.1 undecidable manual P 199 29.5482 91 -0.04 99
IV.PARC.HHZ. 2020-09-21T06:24:53.76 0.3 undecidable manual P 295 36.0417 91 -0.64 63
IV.ATLO.EHE. 2020-09-21T06:24:52.86 0.1 undecidable manual P 221 29.3484 91 -0.21 96
IV.TB02.DHZ.01 2020-09-21T06:24:52.40 0.3 undecidable manual P 230 24.9528 91 0.22 72
IV.ARVD.HHZ. 2020-09-21T06:24:51.80 0.1 undecidable manual P 94 23.754 91 -0.15 98
IV.TB03.DHZ.01 2020-09-21T06:24:51.80 0.3 undecidable manual P 237 22.755 91 0.05 75
IV.TB01.DHN.01 2020-09-21T06:24:51.65 0.1 undecidable manual P 229 22.4553 91 -0.04 100
IV.ATVO.HHZ. 2020-09-21T06:24:51.91 0.3 undecidable manual P 233 24.2535 91 -0.14 73
IV.ATPI.EHZ. 2020-09-21T06:24:51.32 0.3 undecidable manual P 250 20.868 91 -0.06 75
IV.ATFO.HHZ. 2020-09-21T06:24:50.82 0.3 undecidable manual P 200 17.4714 92 0.13 74
IV.ATPC.HHZ. 2020-09-21T06:24:50.60 0.1 undecidable manual P 256 15.6732 92 0.26 97
IV.MPAG.EHZ. 2020-09-21T06:24:50.48 0.1 undecidable manual P 35 15.6732 92 0.16 99
IV.ATBU.EHZ. 2020-09-21T06:24:49.28 0.1 undecidable manual P 242 8.9799 93 0.29 97
IV.SSFR.HHE. 2020-09-21T06:24:49.85 0.1 undecidable manual P 128 13.9749 92 -0.13 100
IV.ATSC.EHE. 2020-09-21T06:24:49.22 0.3 undecidable manual P 162 10.4784 93 -0.08 76
IV.NARO.HHZ. 2020-09-21T06:24:49.57 0.3 undecidable manual P 334 11.9769 92 -0.01 77
IV.FRON.EHN. 2020-09-21T06:24:48.65 0.1 undecidable manual P 87 6.3936 94 0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NARO.HHN. ML:0.3 0.000030024755 0.0608 AML other m 2020-09-21T06:24:52.32
IV.NARO.HHE. ML:0.3 0.00002825283 0.0576 AML other m 2020-09-21T06:24:55.08
IV.MPAG.EHE. ML:0.4 0.000025364564 0.2016 AML other m 2020-09-21T06:24:55.44
IV.ATFO.HHN. ML:0.8 0.00006677762 0.5408 AML other m 2020-09-21T06:24:56.44
IV.ARVD.HHE. ML:0.3 0.00001653201 0.1376 AML other m 2020-09-21T06:24:56.54
IV.MPAG.EHN. ML:0.6 0.000047903139999999995 0.4416 AML other m 2020-09-21T06:24:56.71
IV.ATFO.HHE. ML:1.0 0.0001023033 0.3808 AML other m 2020-09-21T06:24:56.82
IV.ATVO.HHN. ML:0.6 0.00003109076 0.4 AML other m 2020-09-21T06:24:57.83
IV.ARVD.HHN. ML:0.3 0.00001517651 0.16 AML other m 2020-09-21T06:24:58.00
IV.MURB.HHN. ML:1.4 0.00013824990000000002 0.32 AML other m 2020-09-21T06:24:58.78
IV.MURB.HNN. ML:1.4 0.00014568989499999998 0.432 AML other m 2020-09-21T06:24:58.63
IV.ATVO.HHE. ML:0.6 0.00002835022 0.4192 AML other m 2020-09-21T06:24:58.56
IV.MURB.HHE. ML:1.4 0.00014098759999999998 0.3392 AML other m 2020-09-21T06:24:59.08
IV.MURB.HNE. ML:1.6 0.0001970154 1.5296 AML other m 2020-09-21T06:24:59.09
IV.ATPI.EHN. ML:0.7 0.00004164531000000001 1.4816 AML other m 2020-09-21T06:24:59.93
IV.ATPI.EHE. ML:0.8 0.000045758359999999996 0.5408 AML other m 2020-09-21T06:24:59.18
IV.PARC.HHN. ML:0.4 0.0000106507575 0.3008 AML other m 2020-09-21T06:25:02.52
IV.PARC.HHE. ML:0.4 0.000011253316500000001 0.5376 AML other m 2020-09-21T06:25:09.05
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