Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.2 on date 23-04-2020 and time 08:09:45 (UTC) in region 7 km S Serra San Quirico (AN)

A magnitude ML 1.2 (quarry blast) earthquake occured in region: 7 km S Serra San Quirico (AN), on

  • 23-04-2020 08:09:45 (UTC)
  • 23-04-2020 10:09:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3900, 12.9980 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 7 2850 2850
Genga AN 7 1797 4647
Poggio San Vicino MC 7 246 4893
Cerreto d'Esi AN 8 3817 8710
Fabriano AN 10 31480 40190
Mergo AN 10 1037 41227
Apiro MC 11 2280 43507
Cupramontana AN 11 4756 48263
Rosora AN 12 1985 50248
Sassoferrato AN 12 7285 57533
Arcevia AN 13 4612 62145
Castelplanio AN 14 3540 65685
Maiolati Spontini AN 14 6248 71933
Matelica MC 15 9981 81914
Poggio San Marcello AN 15 693 82607
Monte Roberto AN 15 3061 85668
Esanatoglia MC 16 2034 87702
Staffolo AN 16 2253 89955
San Paolo di Jesi AN 16 933 90888
Montecarotto AN 16 1987 92875
Castelbellino AN 16 4947 97822
Serra de' Conti AN 17 3746 101568
Gagliole MC 18 620 102188
Cingoli MC 18 10352 112540

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km SW of Ancona (100861 inhabitants)
51 Km S of Fano (60888 inhabitants)
54 Km NE of Foligno (57155 inhabitants)
58 Km S of Pesaro (94582 inhabitants)
59 Km NE of Perugia (166134 inhabitants)
82 Km SE of Rimini (147750 inhabitants)
90 Km E of Arezzo (99543 inhabitants)
97 Km NE of Terni (111501 inhabitants)
100 Km NW of Teramo (54892 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 1.2 2020-04-23
08:09:45		 43.3903 12.9982 1 2020-07-18
21:08:42		 Bollettino Sismico Italiano INGV 80988831
Reviewed
Rev100 		ML 1.2 2020-04-23
08:09:45		 43.4062 13.0022 9 2020-04-23
08:27:38		 Sala Sismica INGV-Roma 78497821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-23 08:09:45 ± 0.11
Latitude 43.3903 ± 0.0072
Longitude 12.9982 ± 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 80988831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 870
Semi-minor axis of confidence ellipse (meter) 700
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 39
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.05126
Epicentral distance of station farthest from the epicenter (degree) 0.49822
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 78497821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-23 08:27:38

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 80988831
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-07-12 21:08:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MC2.EHZ. 2020-04-23T08:09:56.21 0.3 undecidable manual P 164 55.3002 91 -0.68 62
IV.AOI.HHZ. 2020-04-23T08:09:55.23 0.1 undecidable manual P 70 51.7038 91 -0.94 74
IV.PP3.HNE. 2020-04-23T08:09:55.25 0.6 undecidable manual P 91 49.3173 91 -0.44 45
IV.ATVO.HHZ. 2020-04-23T08:09:54.80 0.1 undecidable manual P 269 47.7189 91 -0.56 88
IV.CESI.HHZ. 2020-04-23T08:09:54.19 0.1 undecidable manual P 190 43.4232 91 -0.32 94
IV.CSP1.EHZ. 2020-04-23T08:09:53.12 0.3 undecidable manual P 153 37.1295 91 -0.12 74
IV.MURB.HHZ. 2020-04-23T08:09:53.92 0.1 undecidable manual P 250 40.7259 91 -0.05 100
IV.PIEI.HHZ. 2020-04-23T08:09:53.39 0.3 undecidable manual P 294 40.626 91 -0.55 67
IV.FDMO.HHZ. 2020-04-23T08:09:53.61 0.3 undecidable manual P 170 39.9267 91 -0.19 73
IV.ATCC.EHZ. 2020-04-23T08:09:53.36 0.3 undecidable manual P 232 36.8298 91 0.18 74
IV.NARO.HHZ. 2020-04-23T08:09:53.45 0.3 undecidable manual P 306 41.5251 91 -0.68 63
IV.ATFO.HHZ. 2020-04-23T08:09:52.92 1.0 undecidable manual P 266 34.5432 91 0.2 24
IV.MPAG.EHZ. 2020-04-23T08:09:52.26 0.3 undecidable manual P 324 32.745 91 -0.1 75
IV.COR1.EHZ. 2020-04-23T08:09:51.30 0.6 undecidable manual P 0 26.751 91 0.13 50
IV.FRON.EHZ. 2020-04-23T08:09:51.12 0.3 undecidable manual P 303 26.0517 91 0.09 76
IV.ATSC.EHZ. 2020-04-23T08:09:51.05 0.3 undecidable manual P 279 25.3524 91 0.16 75
IV.FOSV.EHZ. 2020-04-23T08:09:50.60 0.3 undecidable manual P 241 21.867 91 0.41 72
IV.SNTG.HHZ. 2020-04-23T08:09:49.68 0.3 undecidable manual P 197 15.7731 92 0.72 65
IV.CING.HNZ. 2020-04-23T08:09:49.68 0.1 undecidable manual P 96 15.9729 92 0.67 89
IV.SSFR.HHZ. 2020-04-23T08:09:49.89 0.1 undecidable manual P 286 18.1707 92 0.45 96
IV.EL6.EHZ. 2020-04-23T08:09:48.65 0.3 undecidable manual P 129 10.7781 93 0.69 67
IV.ARVD.HHZ. 2020-04-23T08:09:48.68 0.3 undecidable manual P 339 12.7761 92 0.31 75
IV.MMUR.HNZ. 2020-04-23T08:09:47.41 0.3 undecidable manual P 359 5.6943 95 0.46 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARVD.HHE. ML:0.9 0.00011999999999999999 1.32 AML other m 2020-04-23T08:09:51.07
IV.ARVD.HHN. ML:0.9 0.000111 1.2 AML other m 2020-04-23T08:09:52.23
IV.EL6.EHE. ML:1.4 0.0003915 0.42 AML other m 2020-04-23T08:09:52.55
IV.SNTG.HHE. ML:1.2 0.0001985 0.18 AML other m 2020-04-23T08:09:53.28
IV.EL6.EHN. ML:1.4 0.000431 0.3 AML other m 2020-04-23T08:09:53.30
IV.SNTG.HHN. ML:1.2 0.0001705 1.5 AML other m 2020-04-23T08:09:53.03
IV.FOSV.EHE. ML:0.9 0.00005685 0.58 AML other m 2020-04-23T08:09:54.64
IV.FOSV.EHN. ML:1.0 0.0000697 0.68 AML other m 2020-04-23T08:09:54.40
IV.FRON.EHE. ML:1.0 0.000060899999999999996 0.82 AML other m 2020-04-23T08:09:55.97
IV.FRON.EHN. ML:1.1 0.0000745 0.58 AML other m 2020-04-23T08:09:57.62
IV.ATCC.EHN. ML:1.2 0.0000616 0.52 AML other m 2020-04-23T08:10:00.06
IV.PIEI.HHN. ML:0.9 0.0000294 0.24 AML other m 2020-04-23T08:10:00.46
IV.ATCC.EHE. ML:1.3 0.00007714999999999999 1.44 AML other m 2020-04-23T08:10:00.05
IV.FDMO.HHE. ML:1.4 0.0000885 0.14 AML other m 2020-04-23T08:10:01.26
IV.CSP1.EHN. ML:1.1 0.00005500000000000001 0.36 AML other m 2020-04-23T08:10:01.52
IV.FDMO.HHN. ML:1.2 0.0000528 1.48 AML other m 2020-04-23T08:10:01.78
IV.PIEI.HHE. ML:1.2 0.0000559 0.46 AML other m 2020-04-23T08:10:02.10
IV.CESI.HHE. ML:1.2 0.00004505 0.54 AML other m 2020-04-23T08:10:02.27
IV.MURB.HHN. ML:1.7 0.000183 0.28 AML other m 2020-04-23T08:10:02.50
IV.MURB.HHE. ML:1.7 0.00017999999999999998 0.24 AML other m 2020-04-23T08:10:02.39
IV.CSP1.EHE. ML:1.2 0.000068 0.96 AML other m 2020-04-23T08:10:03.46
IV.CESI.HHN. ML:1.0 0.00003594999999999999 0.76 AML other m 2020-04-23T08:10:05.41
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