Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 0.9 on date 27-09-2021 and time 12:33:47 (UTC) in region 3 km SW Serra San Quirico (AN)

A magnitude ML 0.9 (quarry blast) earthquake occured in region: 3 km SW Serra San Quirico (AN), on

  • 27-09-2021 12:33:47 (UTC)
  • 27-09-2021 14:33:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4250, 12.9890 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
Serra San Quirico AN 3 2850 2850
Genga AN 4 1797 4647
Mergo AN 7 1037 5684
Poggio San Vicino MC 9 246 5930
Rosora AN 9 1985 7915
Arcevia AN 9 4612 12527
Sassoferrato AN 11 7285 19812
Cupramontana AN 11 4756 24568
Castelplanio AN 11 3540 28108
Cerreto d'Esi AN 12 3817 31925
Fabriano AN 12 31480 63405
Poggio San Marcello AN 12 693 64098
Maiolati Spontini AN 12 6248 70346
Apiro MC 12 2280 72626
Montecarotto AN 13 1987 74613
Monte Roberto AN 14 3061 77674
Serra de' Conti AN 14 3746 81420
Castelbellino AN 15 4947 86367
San Paolo di Jesi AN 15 933 87300
Staffolo AN 16 2253 89553
Barbara AN 18 1368 90921
Matelica MC 19 9981 100902
Serra Sant'Abbondio PU 19 1027 101929
Cingoli MC 19 10352 112281
Esanatoglia MC 20 2034 114315
Pergola PU 20 6333 120648

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km S of Fano (60888 inhabitants)
48 Km W of Ancona (100861 inhabitants)
54 Km S of Pesaro (94582 inhabitants)
57 Km NE of Foligno (57155 inhabitants)
60 Km NE of Perugia (166134 inhabitants)
79 Km SE of Rimini (147750 inhabitants)
89 Km E of Arezzo (99543 inhabitants)
99 Km SE of Cesena (96758 inhabitants)
100 Km N of Terni (111501 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 2021-09-27
12:33:47		 43.4252 12.989 1 2022-03-30
13:04:38		 Bollettino Sismico Italiano INGV 101108881
Reviewed
Rev100 		ML 1.0 2021-09-27
12:33:47		 43.4398 12.9978 2 2021-09-27
12:43:26		 Sala Sismica INGV-Roma 95947451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 12:33:47 ± 0.08
Latitude 43.4252 ± 0.0054
Longitude 12.9890 ± 0.0074
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 101108881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 640
Semi-minor axis of confidence ellipse (meter) 490
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 640.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 10
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26350
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 101108881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-18 12:00:17

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 95947451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 12:43:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.STN3.HNZ.01 2021-09-27T12:35:41.34 3.0 undecidable manual Sg 9.03 0
GU.STV.HHZ. 2021-09-27T12:35:27.85 3.0 undecidable manual Sg 10.12 0
OT.OT05.EHZ. 2021-09-27T12:35:21.68 3.0 undecidable manual Sg 10.2 0
IV.SERS.HHZ. 2021-09-27T12:35:16.16 3.0 undecidable manual Pg 11 0
IV.MARS.HNZ. 2021-09-27T12:35:15.47 3.0 undecidable manual Pg 7.62 0
MN.PDG.HHZ. 2021-09-27T12:35:14.36 3.0 positive manual Pg 15.48 0
OT.OT13.EHZ. 2021-09-27T12:35:11.47 3.0 undecidable manual Sn -5.12 0
MN.VAE.HHZ. 2021-09-27T12:35:08.96 3.0 positive manual Pn -5.62 0
IV.COLB.HHZ. 2021-09-27T12:35:07.20 3.0 undecidable manual Sn -4.32 0
IV.VITU.HHZ. 2021-09-27T12:35:01.05 3.0 undecidable manual Sn -7.21 0
IV.QLNO.HHZ. 2021-09-27T12:35:00.93 3.0 undecidable manual Sn 0.66 0
CR.STON.BHZ. 2021-09-27T12:34:57.52 3.0 undecidable manual Pg 15.56 0
IX.SCL3.EHZ.02 2021-09-27T12:34:42.31 3.0 negative manual Pg 2.9 0
IV.LAV9.HNZ. 2021-09-27T12:34:39.89 3.0 undecidable manual Sn -3.17 0
IV.MNTV.EHZ. 2021-09-27T12:34:35.44 3.0 undecidable manual Sg 2.46 0
OT.OT17.EHZ. 2021-09-27T12:34:33.53 3.0 positive manual Pg 5.17 0
GU.IMI.HHZ. 2021-09-27T12:34:28.46 3.0 undecidable manual Pn 0.45 0
IT.GLNS.HNZ. 2021-09-27T12:34:26.43 3.0 undecidable manual Pg 3.57 0
GU.ROTM.HHZ. 2021-09-27T12:34:24.38 3.0 undecidable manual Pn -1.55 0
IV.CTI.HHZ. 2021-09-27T12:34:18.77 3.0 undecidable manual Pg 1.66 0
IV.TST02.HHZ. 2021-09-27T12:34:17.69 3.0 negative manual Pg -0.73 0
IV.LAV9.HNZ. 2021-09-27T12:34:09.64 3.0 negative manual Pn -4.79 0
IV.FIR.HHZ. 2021-09-27T12:33:57.26 3.0 undecidable manual S -6.56 0
IV.MPAG.EHZ. 2021-09-27T12:33:53.27 0.3 undecidable manual P 321 29.2485 91 -0.47 65
IV.ATSC.EHN. 2021-09-27T12:33:52.72 0.3 undecidable manual P 270 24.3534 91 -0.05 72
IV.COR1.EHE. 2021-09-27T12:33:52.88 0.3 undecidable manual P 2 22.9548 91 0.4 67
IV.FRON.EHE. 2021-09-27T12:33:52.54 0.3 undecidable manual P 296 23.5542 91 -0.06 72
IV.SSFR.HHN. 2021-09-27T12:33:51.36 0.1 undecidable manual P 274 16.6722 92 0.13 96
IV.CING.HHZ. 2021-09-27T12:33:51.27 0.3 undecidable manual P 108 17.5713 92 -0.12 72
IV.SNTG.HHZ. 2021-09-27T12:33:51.94 0.3 undecidable manual P 192 19.2696 91 0.2 70
IV.EL6.EHZ. 2021-09-27T12:33:50.60 0.1 undecidable manual P 139 13.9749 92 -0.08 97
IV.IMOL.HNZ. 2021-09-27T12:33:49.40 3.0 negative manual P -3.03 0
IV.ARVD.HHZ. 2021-09-27T12:33:49.68 0.1 undecidable manual P 335 8.9799 93 0 99
IV.MMUR.HNZ. 2021-09-27T12:33:48.32 0.1 undecidable manual P 20 1.998 104 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SNTG.HHE. ML:0.8 0.000054449999999999995 0.32 AML other m 2021-09-27T12:33:55.67
IV.EL6.EHE. ML:1.1 0.000157 0.4 AML other m 2021-09-27T12:33:55.69
IV.EL6.EHN. ML:1.0 0.0001348 0.92 AML other m 2021-09-27T12:33:56.51
IV.SNTG.HHN. ML:0.7 0.000047350000000000006 0.24 AML other m 2021-09-27T12:33:57.51
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