Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 01-08-2023 and time 12:36:26 (Italy) in region 5 km SE Castel d'Aiano (BO)

A magnitude ML 1.7 earthquake occured in region: 5 km SE Castel d'Aiano (BO), on

  • 01-08-2023 10:36:26 (UTC)
  • 01-08-2023 12:36:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2430, 11.0420 at 15 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 5 1906 1906
Vergato BO 7 7639 9545
Montese MO 9 3353 12898
Castel di Casio BO 9 3448 16346
Grizzana Morandi BO 9 3916 20262
Camugnano BO 9 1885 22147
Gaggio Montano BO 10 4878 27025
Alto Reno Terme BO 11 6960 33985
Zocca MO 12 4719 38704
Castiglione dei Pepoli BO 14 5648 44352
Lizzano in Belvedere BO 15 2212 46564
San Benedetto Val di Sambro BO 16 4315 50879
Sambuca Pistoiese PT 16 1626 52505
Marzabotto BO 17 6779 59284
Monzuno BO 19 6328 65612
Pavullo nel Frignano MO 20 17383 82995

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km N of Pistoia (90315 inhabitants)
37 Km SW of Bologna (386663 inhabitants)
41 Km N of Prato (191150 inhabitants)
46 Km S of Modena (184973 inhabitants)
55 Km W of Imola (69797 inhabitants)
55 Km N of Scandicci (50609 inhabitants)
55 Km NW of Firenze (382808 inhabitants)
60 Km SE of Reggio nell'Emilia (171345 inhabitants)
61 Km S of Carpi (70699 inhabitants)
62 Km NE of Lucca (89046 inhabitants)
67 Km W of Faenza (58541 inhabitants)
75 Km E of Massa (69479 inhabitants)
76 Km NE of Viareggio (62467 inhabitants)
78 Km E of Carrara (63133 inhabitants)
78 Km NE of Pisa (89158 inhabitants)
80 Km W of Forlì (117913 inhabitants)
80 Km SW of Ferrara (133155 inhabitants)
84 Km SE of Parma (192836 inhabitants)
94 Km W of Ravenna (159116 inhabitants)
97 Km W of Cesena (96758 inhabitants)
97 Km NE of Livorno (159219 inhabitants)
98 Km E of La Spezia (93959 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
Reviewed
Rev100 		ML 1.7 2023-08-01
10:36:26		 44.2432 11.0423 15 2023-08-01
10:56:40		 Sala Sismica INGV-Roma 119755791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-01 10:36:26 ± 0.17
Latitude 44.2432 ± 0.0090
Longitude 11.0423 ± 0.0113
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 119755791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 937
Semi-minor axis of confidence ellipse (meter) 549
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 206
Circular confidence region, given by single value of horizontal uncertainty (meter) 940.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 20
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.47754
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 119755791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-01 10:56:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PARC.HHZ. 2023-08-01T10:36:59.30 3.0 undecidable manual S -0.12 0
IV.VISG.HHZ. 2023-08-01T10:36:38.16 0.6 undecidable manual S 101 31.746 103 0.18 48
IV.SEI.HHZ. 2023-08-01T10:36:38.60 0.6 undecidable manual S 130 32.745 102 0.35 46
GU.POPM.HHZ. 2023-08-01T10:36:38.45 0.6 undecidable manual S 226 31.6461 103 0.49 45
IV.MOCL.EHZ. 2023-08-01T10:36:37.60 0.3 undecidable manual S 157 28.6491 105 0.42 68
GU.CARD.HHZ. 2023-08-01T10:36:36.68 1.0 undecidable manual P 242 50.7159 97 0.48 22
MN.VLC.HHZ. 2023-08-01T10:36:36.49 0.1 undecidable manual P 260 53.0025 96 -0.06 94
IV.BOSL.HHN. 2023-08-01T10:36:35.21 0.1 undecidable manual P 143 43.623 98 0.1 95
GU.GSCL.HHZ. 2023-08-01T10:36:35.01 0.1 undecidable manual P 288 38.0286 100 0.75 81
IV.BDI.HHZ. 2023-08-01T10:36:34.35 0.1 undecidable manual P 241 40.8258 99 -0.33 91
GU.POPM.HHZ. 2023-08-01T10:36:33.16 1.0 undecidable manual P 226 31.6461 103 -0.13 24
IV.FNVD.HHZ. 2023-08-01T10:36:33.22 0.6 undecidable manual S 143 10.5783 138 0.26 48
IV.MTRZ.HHE. 2023-08-01T10:36:33.37 0.1 undecidable manual P 76 31.3464 103 0.12 97
IV.ZCCA.HHZ. 2023-08-01T10:36:33.76 0.6 undecidable manual S 336 13.0758 130 0.33 48
IV.PDN10.EHZ. 2023-08-01T10:36:33.62 0.1 undecidable manual P 100
IV.SEI.HHZ. 2023-08-01T10:36:33.09 1.0 undecidable manual P 130 32.745 102 -0.37 23
IV.MPPT.EHE. 2023-08-01T10:36:32.65 0.1 undecidable manual P 173 31.9458 103 -0.69 83
IV.MOCL.EHZ. 2023-08-01T10:36:32.70 0.3 negative manual P 157 28.6491 105 -0.15 73
IV.VISG.HHZ. 2023-08-01T10:36:32.88 0.6 negative manual P 101 31.746 103 -0.43 45
IV.ZCCA.HHZ. 2023-08-01T10:36:30.22 0.1 undecidable manual P 336 13.0758 130 -0.46 93
IV.FNVD.HHZ. 2023-08-01T10:36:30.25 0.1 positive manual P 143 10.5783 138 -0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FNVD.HHE. ML:2.4 0.002235 0.38 AML other m 2023-08-01T10:36:33.36
IV.FNVD.HHN. ML:2.6 0.00411 0.08 AML other m 2023-08-01T10:36:33.48
IV.ZCCA.HNN. ML:2.0 0.0007945 1.64 AML other m 2023-08-01T10:36:34.00
IV.ZCCA.HHN. ML:2.0 0.0008440000000000001 1.64 AML other m 2023-08-01T10:36:34.00
IV.ZCCA.HNE. ML:1.8 0.000516 1.48 AML other m 2023-08-01T10:36:35.87
IV.ZCCA.HHE. ML:1.8 0.000531 1.46 AML other m 2023-08-01T10:36:35.87
IV.MOCL.EHN. ML:1.5 0.000152 1.56 AML other m 2023-08-01T10:36:38.83
GU.POPM.HHN. ML:1.6 0.00017649999999999998 0.92 AML other m 2023-08-01T10:36:38.85
GU.POPM.HHE. ML:1.8 0.000237 1.76 AML other m 2023-08-01T10:36:39.96
IV.VISG.HHE. ML:1.4 0.000106 0.52 AML other m 2023-08-01T10:36:39.26
IV.MOCL.EHE. ML:1.5 0.000135 0.24 AML other m 2023-08-01T10:36:39.43
IV.VISG.HHN. ML:1.6 0.00016649999999999998 0.54 AML other m 2023-08-01T10:36:39.32
IV.SEI.HHE. ML:1.8 0.00026700000000000004 0.28 AML other m 2023-08-01T10:36:39.77
IV.SEI.HHN. ML:1.8 0.0002675 0.44 AML other m 2023-08-01T10:36:40.08
IV.BDI.HHE. ML:1.5 0.0001047 0.22 AML other m 2023-08-01T10:36:42.49
IV.BDI.HHN. ML:1.3 0.00006575 0.78 AML other m 2023-08-01T10:36:42.74
GU.CARD.HHN. ML:1.5 0.00007735 0.32 AML other m 2023-08-01T10:36:44.76
GU.CARD.HHE. ML:1.8 0.0001395 0.12 AML other m 2023-08-01T10:36:44.65
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