Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.1 on date 20-05-2021 and time 17:50:46 (Italy) in region 7 km SW Cingoli (MC)

A magnitude ML 1.1 (quarry blast) earthquake occured in region: 7 km SW Cingoli (MC), on

  • 20-05-2021 15:50:46 (UTC)
  • 20-05-2021 17:50:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3180, 13.1800 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
Cingoli MC 7 10352 10352
Apiro MC 9 2280 12632
San Severino Marche MC 10 12726 25358
Poggio San Vicino MC 10 246 25604
Treia MC 11 9403 35007
Gagliole MC 13 620 35627
Staffolo AN 13 2253 37880
Appignano MC 15 4213 42093
Pollenza MC 15 6618 48711
Tolentino MC 15 20069 68780
Cupramontana AN 15 4756 73536
San Paolo di Jesi AN 15 933 74469
Matelica MC 15 9981 84450
Castelraimondo MC 15 4587 89037
Serrapetrona MC 16 966 90003
Cerreto d'Esi AN 16 3817 93820
Belforte del Chienti MC 18 1886 95706
Maiolati Spontini AN 18 6248 101954
Monte Roberto AN 19 3061 105015
Castelbellino AN 19 4947 109962
Filottrano AN 19 9499 119461
Serra San Quirico AN 20 2850 122311

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km SW of Ancona (100861 inhabitants)
56 Km NE of Foligno (57155 inhabitants)
60 Km S of Fano (60888 inhabitants)
68 Km E of Perugia (166134 inhabitants)
69 Km SE of Pesaro (94582 inhabitants)
85 Km NW of Teramo (54892 inhabitants)
95 Km NE of Terni (111501 inhabitants)
96 Km SE of Rimini (147750 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 1.1 2021-05-20
15:50:46		 43.3182 13.1797 1 2021-12-29
11:12:16		 Bollettino Sismico Italiano INGV 93580281
Reviewed
Rev100 		ML 1.2 2021-05-20
15:50:45		 43.3403 13.2107 7 2021-05-20
16:00:04		 Sala Sismica INGV-Roma 90297991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-20 15:50:46 ± 0.15
Latitude 43.3182 ± 0.0081
Longitude 13.1797 ± 0.0136
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 93580281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1170
Semi-minor axis of confidence ellipse (meter) 880
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 250
Circular confidence region, given by single value of horizontal uncertainty (meter) 1170.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52341
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 90297991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-20 16:00:04

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 93580281
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-02 23:09:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RMP.HHZ. 2021-05-20T15:51:36.14 3.0 undecidable manual S 0.27 0
IV.NARO.HHZ. 2021-05-20T15:50:57.08 0.3 undecidable manual P 304 58.0974 90 -0.7 57
IV.ASSB.HHZ. 2021-05-20T15:50:56.24 0.3 undecidable manual P 234 52.0035 91 -0.32 65
IV.NRCA.HHZ. 2021-05-20T15:50:56.07 0.1 undecidable manual P 186 54.0015 91 -0.89 71
IV.CESI.HHZ. 2021-05-20T15:50:54.45 0.1 undecidable manual P 213 41.2254 91 0.05 94
IV.MC2.EHZ. 2021-05-20T15:50:54.80 0.1 undecidable manual P 179 45.1215 91 -0.37 87
IV.FRON.EHZ. 2021-05-20T15:50:54.63 0.1 undecidable manual P 301 42.7239 91 -0.07 94
IV.MF5.EHZ. 2021-05-20T15:50:54.95 0.1 undecidable manual P 148 43.1235 91 0.18 91
IV.AOI.HHN. 2021-05-20T15:50:53.90 0.3 undecidable manual P 53 42.624 91 -0.78 57
IV.FDMO.HHZ. 2021-05-20T15:50:52.64 0.1 undecidable manual P 193 32.1456 91 0.07 95
IV.GUMA.HHZ. 2021-05-20T15:50:52.72 0.1 undecidable manual P 156 31.0467 91 0.37 90
IV.ARVD.HHZ. 2021-05-20T15:50:51.73 0.1 undecidable manual P 316 27.6501 91 0.05 96
IV.CSP1.EHZ. 2021-05-20T15:50:51.41 0.1 undecidable manual P 175 25.1526 91 0.23 93
IV.TRE1.HNE. 2021-05-20T15:50:48.67 0.1 undecidable manual P 94 10.7781 93 0.38 93
IV.EL6.EHZ. 2021-05-20T15:50:48.64 0.1 positive manual P 281 6.3936 94 1.22 66
IV.CING.HHZ. 2021-05-20T15:50:47.49 0.1 positive manual P 11 6.4935 94 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARVD.HHN. ML:0.8 0.00004145 0.92 AML other m 2021-05-20T15:50:57.33
IV.ARVD.HHE. ML:0.8 0.00003955 0.88 AML other m 2021-05-20T15:50:57.09
IV.CSP1.EHE. ML:1.4 0.0001615 0.44 AML other m 2021-05-20T15:50:57.60
IV.CSP1.EHN. ML:1.3 0.00013595000000000002 1.44 AML other m 2021-05-20T15:50:59.75
IV.FDMO.HHE. ML:0.9 0.000036400000000000004 1.12 AML other m 2021-05-20T15:50:59.79
IV.FDMO.HHN. ML:0.9 0.00003315 0.78 AML other m 2021-05-20T15:50:59.43
IV.FRON.EHN. ML:1.1 0.00004045 0.3 AML other m 2021-05-20T15:51:03.15
IV.CESI.HHN. ML:1.1 0.0000438 0.82 AML other m 2021-05-20T15:51:03.29
IV.GUMA.HHE. ML:1.4 0.00012355 0.42 AML other m 2021-05-20T15:51:03.72
IV.FRON.EHE. ML:0.9 0.00002315 1.12 AML other m 2021-05-20T15:51:03.98
IV.CESI.HHE. ML:1.0 0.0000369 0.54 AML other m 2021-05-20T15:51:04.25
IV.NRCA.HHE. ML:1.2 0.00003875000000000001 0.5 AML other m 2021-05-20T15:51:06.50
IV.GUMA.HHN. ML:1.4 0.0001076 1.24 AML other m 2021-05-20T15:51:07.62
IV.NRCA.HHN. ML:1.1 0.0000313 0.8 AML other m 2021-05-20T15:51:09.94
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