Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 0.3 on date 20-10-2020 and time 06:09:43 (UTC) in region 4 km E Piobbico (PU)

A magnitude ML 0.3 (quarry blast) earthquake occured in region: 4 km E Piobbico (PU), on

  • 20-10-2020 06:09:43 (UTC)
  • 20-10-2020 08:09:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5790, 12.5620 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
Piobbico PU 4 2029 2029
Cagli PU 8 8731 10760
Acqualagna PU 10 4393 15153
Urbania PU 11 7099 22252
Apecchio PU 12 1882 24134
Cantiano PU 13 2245 26379
Fermignano PU 13 8596 34975
Peglio PU 14 696 35671
Sant'Angelo in Vado PU 15 4133 39804
Frontone PU 16 1300 41104
Urbino PU 18 15019 56123
Pietralunga PG 18 2111 58234
Serra Sant'Abbondio PU 19 1027 59261
Lunano PU 20 1527 60788
Mercatello sul Metauro PU 20 1378 62166

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km SW of Pesaro (94582 inhabitants)
47 Km SW of Fano (60888 inhabitants)
54 Km S of Rimini (147750 inhabitants)
54 Km N of Perugia (166134 inhabitants)
56 Km E of Arezzo (99543 inhabitants)
67 Km SE of Cesena (96758 inhabitants)
70 Km N of Foligno (57155 inhabitants)
77 Km W of Ancona (100861 inhabitants)
83 Km SE of Forlì (117913 inhabitants)
96 Km SE of Faenza (58541 inhabitants)
98 Km SE of Ravenna (159116 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 0.3 2020-10-20
06:09:43		 43.5787 12.5622 1 2021-02-26
14:56:13		 Bollettino Sismico Italiano INGV 86017941
Reviewed
Rev100 		ML 0.7 2020-10-20
06:09:41		 43.6432 12.4638 11 2020-10-20
06:20:17		 Sala Sismica INGV-Roma 83943991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-20 06:09:43 ± 0.1
Latitude 43.5787 ± 0.0054
Longitude 12.5622 ± 0.0099
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 86017941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 860
Semi-minor axis of confidence ellipse (meter) 470
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 305
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
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) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.03507
Epicentral distance of station farthest from the epicenter (degree) 0.22663
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:0.3

Field Value
Value 0.3
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 86017941
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-04 17:56:44

ML:0.7

Field Value
Value 0.7
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 83943991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-20 06:20:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2020-10-20T06:09:47.56 0.3 undecidable manual P 132 23.754 91 -0.29 69
IV.ATFO.HHZ. 2020-10-20T06:09:47.65 0.3 undecidable manual P 178 23.5542 91 -0.16 71
IV.ATVO.HHZ. 2020-10-20T06:09:47.98 0.3 undecidable manual P 210 25.1526 91 -0.15 71
IV.MPAG.EHZ. 2020-10-20T06:09:46.63 0.3 undecidable manual P 70 16.7721 92 0.17 72
IV.FRON.EHZ. 2020-10-20T06:09:46.19 0.3 undecidable manual P 117 14.7741 92 0.13 73
IV.ATPC.HNZ. 2020-10-20T06:09:45.94 0.1 undecidable manual P 218 13.7751 92 0.09 98
IV.ATBU.HNZ. 2020-10-20T06:09:45.59 0.1 undecidable manual P 186 11.4774 92 0.2 96
IV.NARO.HHZ. 2020-10-20T06:09:43.79 0.1 undecidable manual P 23 3.8961 97 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRON.EHE. ML:0.2 0.000018913204999999997 0.08 AML other m 2020-10-20T06:09:47.40
IV.SSFR.HHN. ML:0.9 0.000050529435 0.0992 AML other m 2020-10-20T06:09:48.53
IV.FRON.EHN. ML:0.5 0.000037634365000000004 0.1184 AML other m 2020-10-20T06:09:51.12
IV.MPAG.EHE. ML:0.0 0.0000111967155 0.1024 AML other m 2020-10-20T06:09:51.94
IV.MPAG.EHN. ML:0.0 0.000008700422999999998 0.08 AML other m 2020-10-20T06:09:52.66
IV.ATVO.HHN. ML:0.2 0.000010044582999999999 0.1024 AML other m 2020-10-20T06:09:53.57
IV.SSFR.HHE. ML:0.7 0.00003617187 0.0992 AML other m 2020-10-20T06:09:53.71
IV.ATVO.HHE. ML:0.4 0.000013248195000000001 1.8624 AML other m 2020-10-20T06:09:53.02
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