Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 02-08-2021 and time 01:17:37 (Italy) in region Barbara (AN)

A magnitude ML 0.8 earthquake occured in region: Barbara (AN), on

  • 01-08-2021 23:17:37 (UTC)
  • 02-08-2021 01:17:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5820, 13.0250 at 39 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Barbara AN 0 1368 1368
Ostra Vetere AN 4 3311 4679
Serra de' Conti AN 5 3746 8425
Castelleone di Suasa AN 5 1676 10101
San Lorenzo in Campo PU 7 3414 13515
Montecarotto AN 7 1987 15502
Corinaldo AN 8 4998 20500
Poggio San Marcello AN 9 693 21193
Castelplanio AN 11 3540 24733
Arcevia AN 11 4612 29345
Mondavio PU 11 3810 33155
Fratte Rosa PU 11 966 34121
Ostra AN 11 6875 40996
Belvedere Ostrense AN 12 2234 43230
Rosora AN 12 1985 45215
Trecastelli AN 12 7625 52840
Monte Porzio PU 12 2836 55676
Mergo AN 12 1037 56713
Barchi PU 13 967 57680
Orciano di Pesaro PU 13 2028 59708
Maiolati Spontini AN 14 6248 65956
Castelbellino AN 14 4947 70903
Monte Roberto AN 15 3061 73964
San Marcello AN 15 2057 76021
Serra San Quirico AN 15 2850 78871
Pergola PU 15 6333 85204
Morro d'Alba AN 16 1903 87107
San Giorgio di Pesaro PU 16 1388 88495
Sant'Ippolito PU 17 1563 90058
Cupramontana AN 17 4756 94814
Piagge PU 18 1022 95836
Genga AN 18 1797 97633
Monsano AN 18 3405 101038
San Paolo di Jesi AN 19 933 101971
Montemaggiore al Metauro PU 19 2893 104864
Jesi AN 19 40399 145263
Mondolfo PU 20 14277 159540

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km S of Fano (60888 inhabitants)
38 Km S of Pesaro (94582 inhabitants)
40 Km W of Ancona (100861 inhabitants)
65 Km SE of Rimini (147750 inhabitants)
74 Km NE of Perugia (166134 inhabitants)
74 Km NE of Foligno (57155 inhabitants)
88 Km SE of Cesena (96758 inhabitants)
93 Km E of Arezzo (99543 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 0.8 2021-08-01
23:17:37		 43.5823 13.0248 39 2021-12-29
11:12:40		 Bollettino Sismico Italiano INGV 96862561
Reviewed
Rev100 		Md 1.5 2021-08-01
23:17:36		 43.55 13.0232 43 2021-08-01
23:25:44		 Sala Sismica INGV-Roma 93536181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-01 23:17:37 ± 0.18
Latitude 43.5823 ± 0.0099
Longitude 13.0248 ± 0.0124
Depth (km) 39 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96862561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1128
Semi-minor axis of confidence ellipse (meter) 675
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 201
Circular confidence region, given by single value of horizontal uncertainty (meter) 1130.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.05216
Epicentral distance of station farthest from the epicenter (degree) 0.68798
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 3
Type of magnitude ML
Reference to an origin 96862561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-10 16:03:35

Md:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 8
Type of magnitude Md
Reference to an origin 93536181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-01 23:25:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATPC.HHZ. 2021-08-01T23:17:55.52 0.3 undecidable manual S 256 47.0196 102 0.69 60
IV.PE3.EHZ. 2021-08-01T23:17:54.78 0.3 undecidable manual S 287 44.2224 106 0.53 63
IV.PIEI.HNE. 2021-08-01T23:17:53.19 0.6 undecidable manual S 263 39.7269 113 -0.14 48
IV.ATBU.HNZ. 2021-08-01T23:17:53.95 0.3 undecidable manual S 253 40.1265 112 0.54 64
IV.NARO.HHZ. 2021-08-01T23:17:52.39 0.3 undecidable manual S 275 35.8419 118 -0.18 72
IV.FOSV.HNE. 2021-08-01T23:17:52.71 0.3 undecidable manual S 214 38.3283 115 -0.34 68
IV.CING.HNZ. 2021-08-01T23:17:51.27 0.3 undecidable manual S 149 26.751 132 0.3 71
IV.EL6.EHZ. 2021-08-01T23:17:51.67 0.3 undecidable manual S 168 28.749 129 0.37 70
IV.ATSC.EHE. 2021-08-01T23:17:51.70 0.6 undecidable manual S 237 32.4453 123 -0.24 47
IV.BLLA.EHE. 2021-08-01T23:17:50.63 0.6 undecidable manual P 325 76.368 92 -0.48 42
IV.MPAG.EHN. 2021-08-01T23:17:50.31 0.6 undecidable manual S 284 21.9669 140 0.05 49
IV.SSFR.HNE. 2021-08-01T23:17:50.54 0.6 undecidable manual S 230 25.3524 134 -0.22 48
IV.FRON.EHZ. 2021-08-01T23:17:50.67 0.3 undecidable manual S 254 25.0527 135 -0.05 75
IV.ARVD.HHZ. 2021-08-01T23:17:48.96 0.6 undecidable manual S 216 11.4774 158 -0.13 50
IV.PE3.EHZ. 2021-08-01T23:17:47.34 0.3 undecidable manual P 287 44.2224 106 0.2 69
IV.ATPC.HHZ. 2021-08-01T23:17:47.69 0.3 undecidable manual P 256 47.0196 102 0.21 69
IV.APEC.HNZ. 2021-08-01T23:17:47.85 0.3 undecidable manual P 267 48.7179 100 0.17 69
IV.ATBU.HNZ. 2021-08-01T23:17:46.65 0.6 undecidable manual P 253 40.1265 112 -0.01 49
IV.NARO.HHZ. 2021-08-01T23:17:46.02 0.3 undecidable manual P 275 35.8419 118 -0.15 73
IV.PIEI.HNE. 2021-08-01T23:17:46.34 0.3 undecidable manual P 263 39.7269 113 -0.27 70
IV.FOSV.HNE. 2021-08-01T23:17:46.15 0.1 undecidable manual P 214 38.3283 115 -0.3 92
IV.CING.HNZ. 2021-08-01T23:17:45.49 0.6 undecidable manual P 149 26.751 132 0.24 47
IV.EL6.EHZ. 2021-08-01T23:17:45.63 0.6 undecidable manual P 168 28.749 129 0.19 48
IV.ATSC.EHE. 2021-08-01T23:17:45.51 0.1 undecidable manual P 237 32.4453 123 -0.3 94
IV.COR1.HNZ. 2021-08-01T23:17:44.58 0.1 undecidable manual P 340 5.7942 169 0.62 87
IV.SSFR.HNE. 2021-08-01T23:17:44.82 0.1 undecidable manual P 230 25.3524 134 -0.31 95
IV.FRON.EHZ. 2021-08-01T23:17:44.81 0.1 undecidable manual P 254 25.0527 135 -0.29 96
IV.MPAG.EHN. 2021-08-01T23:17:44.71 0.1 undecidable manual P 284 21.9669 140 -0.12 100
IV.ARVD.HHZ. 2021-08-01T23:17:43.98 0.1 positive manual P 216 11.4774 158 -0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRON.EHN. ML:1.3 0.000053408245 1.6128 AML other m 2021-08-01T23:17:49.54
IV.ARVD.HHN. ML:0.6 0.00001736604 1.4592 AML other m 2021-08-01T23:17:48.85
IV.ARVD.HHE. ML:0.6 0.0000160459615 0.2176 AML other m 2021-08-01T23:17:49.79
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