Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 10-07-2021 and time 16:43:36 (Italy) in region 3 km NW Castel d'Aiano (BO)

A magnitude ML 1.9 earthquake occured in region: 3 km NW Castel d'Aiano (BO), on

  • 10-07-2021 14:43:36 (UTC)
  • 10-07-2021 16:43:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3050, 10.9780 at 30 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
Castel d'Aiano BO 3 1906 1906
Zocca MO 5 4719 6625
Montese MO 5 3353 9978
Vergato BO 11 7639 17617
Pavullo nel Frignano MO 12 17383 35000
Gaggio Montano BO 12 4878 39878
Guiglia MO 14 3931 43809
Grizzana Morandi BO 15 3916 47725
Castel di Casio BO 16 3448 51173
Alto Reno Terme BO 17 6960 58133
Marano sul Panaro MO 17 5060 63193
Lizzano in Belvedere BO 17 2212 65405
Camugnano BO 17 1885 67290
Fanano MO 18 2989 70279
Sestola MO 18 2508 72787
Marzabotto BO 19 6779 79566
Lama Mocogno MO 20 2734 82300
Vignola MO 20 25353 107653
Serramazzoni MO 20 8282 115935
Savignano sul Panaro MO 20 9177 125112

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Bologna (386663 inhabitants)
38 Km S of Modena (184973 inhabitants)
42 Km N of Pistoia (90315 inhabitants)
48 Km N of Prato (191150 inhabitants)
52 Km SE of Reggio nell'Emilia (171345 inhabitants)
54 Km S of Carpi (70699 inhabitants)
59 Km W of Imola (69797 inhabitants)
63 Km N of Scandicci (50609 inhabitants)
64 Km NW of Firenze (382808 inhabitants)
64 Km NE of Lucca (89046 inhabitants)
72 Km W of Faenza (58541 inhabitants)
73 Km E of Massa (69479 inhabitants)
75 Km E of Carrara (63133 inhabitants)
76 Km SE of Parma (192836 inhabitants)
76 Km NE of Viareggio (62467 inhabitants)
78 Km SW of Ferrara (133155 inhabitants)
80 Km NE of Pisa (89158 inhabitants)
85 Km W of Forlì (117913 inhabitants)
94 Km E of La Spezia (93959 inhabitants)
98 Km W of Ravenna (159116 inhabitants)
99 Km NE of Livorno (159219 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 1.9 2021-07-10
14:43:36		 44.3052 10.9783 30 2021-12-29
11:12:12		 Bollettino Sismico Italiano INGV 92981841
Reviewed
Rev100 		ML 2.2 2021-07-10
14:43:36		 44.2823 10.9912 30 2021-07-10
14:59:30		 Sala Sismica INGV-Roma 92566331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-10 14:43:36 ± 0.26
Latitude 44.3052 ± 0.0108
Longitude 10.9783 ± 0.0088
Depth (km) 30 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 92981841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1072
Semi-minor axis of confidence ellipse (meter) 504
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 167
Circular confidence region, given by single value of horizontal uncertainty (meter) 1070.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.04587
Epicentral distance of station farthest from the epicenter (degree) 0.50902
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 92566331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-10 14:59:30

ML:1.9

Field Value
Value 1.9
Uncertainty 0.5
Num. used stations 12
Type of magnitude ML
Reference to an origin 92981841
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-08 15:41:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRMI.HNN. 2021-07-10T14:43:55.52 0.6 undecidable manual S 180 56.499 113 0.61 41
GU.CARD.HHZ. 2021-07-10T14:43:53.65 0.6 undecidable manual S 232 50.2164 116 0.28 46
GU.SARM.EHZ. 2021-07-10T14:43:53.00 0.6 undecidable manual S 254 47.8188 117 0.2 47
IV.SEI.HHZ. 2021-07-10T14:43:52.03 0.3 undecidable manual S 132 41.1255 121 0.8 60
IV.BDI.HNZ. 2021-07-10T14:43:51.11 0.1 undecidable manual S 229 40.626 122 -0.01 99
IV.MPPT.EHZ. 2021-07-10T14:43:50.46 0.6 undecidable manual S 167 39.5271 122 -0.43 46
IV.VISG.HHZ. 2021-07-10T14:43:50.96 0.6 undecidable manual S 109 38.4282 123 0.33 47
IV.MOCL.EHZ. 2021-07-10T14:43:50.17 0.3 undecidable manual S 154 37.0296 124 -0.14 74
GU.GSCL.HHN. 2021-07-10T14:43:49.30 0.6 undecidable manual S 279 31.3464 129 0.19 49
GU.POPM.HHZ. 2021-07-10T14:43:49.35 0.6 undecidable manual S 212 33.8439 127 -0.27 48
IV.CRMI.HNN. 2021-07-10T14:43:47.48 0.1 undecidable manual P 180 56.499 113 0.43 88
IV.ZCCA.HHZ. 2021-07-10T14:43:46.04 0.6 undecidable manual S 358 5.0949 170 0.66 46
GU.CARD.HHZ. 2021-07-10T14:43:46.06 0.3 undecidable manual P 232 50.2164 116 -0.1 73
GU.SARM.EHZ. 2021-07-10T14:43:45.90 0.3 undecidable manual P 254 47.8188 117 0.06 73
IV.MTRZ.HNN. 2021-07-10T14:43:45.00 0.3 undecidable manual P 88 35.4423 126 0.8 61
IV.FNVD.HHZ. 2021-07-10T14:43:45.88 0.6 undecidable manual S 143 19.0698 145 -0.98 38
IV.MPPT.EHZ. 2021-07-10T14:43:44.72 0.1 undecidable manual P 167 39.5271 122 -0.01 100
IV.VISG.HHZ. 2021-07-10T14:43:44.43 0.1 undecidable manual P 109 38.4282 123 -0.16 97
IV.SEI.HHZ. 2021-07-10T14:43:44.64 0.3 undecidable manual P 132 41.1255 121 -0.29 71
IV.MOCL.EHZ. 2021-07-10T14:43:44.54 0.3 undecidable manual P 154 37.0296 124 0.14 73
IV.BDI.HNZ. 2021-07-10T14:43:44.89 0.1 undecidable manual P 229 40.626 122 0.02 99
GU.POPM.HHZ. 2021-07-10T14:43:43.81 0.1 undecidable manual P 212 33.8439 127 -0.19 98
GU.GSCL.HHN. 2021-07-10T14:43:43.63 0.1 undecidable manual P 279 31.3464 129 -0.08 100
IV.FNVD.HHZ. 2021-07-10T14:43:41.68 0.1 undecidable manual P 143 19.0698 145 -0.72 85
IV.ZCCA.HHZ. 2021-07-10T14:43:41.23 0.1 undecidable manual P 358 5.0949 170 -0.32 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ZCCA.HNE. ML:2.1 0.0006433883 0.2688 AML other m 2021-07-10T14:43:46.41
IV.ZCCA.HHE. ML:2.1 0.0006492679 0.2368 AML other m 2021-07-10T14:43:46.40
IV.FNVD.HHE. ML:2.3 0.0007835000000000001 0.16 AML other m 2021-07-10T14:43:46.37
IV.ZCCA.HNN. ML:2.4 0.00138629355 0.3392 AML other m 2021-07-10T14:43:46.49
IV.ZCCA.HHN. ML:2.4 0.001404279 0.32 AML other m 2021-07-10T14:43:46.48
IV.FNVD.HHN. ML:2.3 0.0007555000000000001 0.18 AML other m 2021-07-10T14:43:46.39
GU.POPM.HHN. ML:1.7 0.0001560126 0.1984 AML other m 2021-07-10T14:43:49.44
GU.POPM.HHE. ML:1.8 0.00019201344999999998 0.4032 AML other m 2021-07-10T14:43:49.96
IV.MPPT.EHE. ML:1.3 0.000049337755 0.48 AML other m 2021-07-10T14:43:50.96
IV.MPPT.EHN. ML:1.2 0.00004290025 0.2176 AML other m 2021-07-10T14:43:51.09
IV.VISG.HHE. ML:0.7 0.000015659875 0.4992 AML other m 2021-07-10T14:43:51.32
IV.VISG.HHN. ML:0.7 0.000012967919 0.7808 AML other m 2021-07-10T14:43:51.17
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
Waveforms Seismic signals in miniseed + resp format Download