Earthquake with magnitude of ML 1.1 on date 12-09-2021 and time 20:22:14 (Italy) in region 4 km SE Castel d'Aiano (BO)

A magnitude ML 1.1 earthquake occured in region: 4 km SE Castel d'Aiano (BO), on

  • 12-09-2021 18:22:14 (UTC)
  • 12-09-2021 20:22:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.252, 11.018 at 10 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.

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 4 1906 1906
Montese MO 6 3353 5259
Vergato BO 8 7639 12898
Gaggio Montano BO 9 4878 17776
Castel di Casio BO 10 3448 21224
Zocca MO 11 4719 25943
Grizzana Morandi BO 11 3916 29859
Camugnano BO 11 1885 31744
Alto Reno Terme BO 11 6960 38704
Lizzano in Belvedere BO 14 2212 40916
Castiglione dei Pepoli BO 16 5648 46564
Sambuca Pistoiese PT 16 1626 48190
Pavullo nel Frignano MO 18 17383 65573
San Benedetto Val di Sambro BO 18 4315 69888
Marzabotto BO 18 6779 76667
Fanano MO 18 2989 79656
Sestola MO 20 2508 82164

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km N of Pistoia (90315 inhabitants)
37 Km SW of Bologna (386663 inhabitants)
42 Km N of Prato (191150 inhabitants)
45 Km S of Modena (184973 inhabitants)
56 Km N of Scandicci (50609 inhabitants)
57 Km W of Imola (69797 inhabitants)
57 Km NW of Firenze (382808 inhabitants)
58 Km SE of Reggio nell'Emilia (171345 inhabitants)
60 Km S of Carpi (70699 inhabitants)
61 Km NE of Lucca (89046 inhabitants)
69 Km W of Faenza (58541 inhabitants)
74 Km E of Massa (69479 inhabitants)
75 Km NE of Viareggio (62467 inhabitants)
76 Km E of Carrara (63133 inhabitants)
77 Km NE of Pisa (89158 inhabitants)
81 Km SW of Ferrara (133155 inhabitants)
82 Km W of Forlì (117913 inhabitants)
82 Km SE of Parma (192836 inhabitants)
96 Km W of Ravenna (159116 inhabitants)
96 Km E of La Spezia (93959 inhabitants)
96 Km NE of Livorno (159219 inhabitants)
99 Km W of Cesena (96758 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2021-09-12
18:22:14
44.252 11.0183 10 2021-09-12
18:30:13
Sala Sismica INGV-Roma 95358321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-12 18:22:14 ± 0.08
Latitude 44.2520 ± 0.0054
Longitude 11.0183 ± 0.0063
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95358321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 612
Semi-minor axis of confidence ellipse (meter) 405
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 23
Circular confidence region, given by single value of horizontal uncertainty (meter) 610
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.10342
Epicentral distance of station farthest from the epicenter (degree) 0.44606
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 95358321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-12 18:30:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CARD.HHZ. 2021-09-12T18:22:30.15 0.6 undecidable manual S 240 0.4461 50 -0.01 48
IV.BDI.HNN. 2021-09-12T18:22:27.71 0.3 undecidable manual S 238 0.357 50 0.18 71
IV.VISG.HHE. 2021-09-12T18:22:26.09 0.6 undecidable manual S 102 0.3049 50 0.13 48
IV.SEI.HHE. 2021-09-12T18:22:26.40 0.1 undecidable manual S 129 0.3139 50 0.15 96
GU.POPM.HHZ. 2021-09-12T18:22:25.42 0.1 undecidable manual S 222 0.2797 50 0.2 96
IV.MPPT.EHZ. 2021-09-12T18:22:25.90 0.1 undecidable manual S 170 0.2986 50 0.1 97
IV.MOCL.EHZ. 2021-09-12T18:22:24.98 0.1 undecidable manual S 155 0.2734 50 -0.06 99
GU.CARD.HHZ. 2021-09-12T18:22:23.21 0.3 undecidable manual P 240 0.4461 50 -0.22 69
IV.SEI.HHE. 2021-09-12T18:22:22.16 1.0 undecidable manual P 129 0.3139 50 0.99 18
IV.BDI.HNN. 2021-09-12T18:22:21.74 0.1 undecidable manual P 238 0.357 50 -0.17 95
IV.MOCL.EHZ. 2021-09-12T18:22:20.31 0.1 positive manual P 155 0.2734 50 -0.16 97
GU.POPM.HHZ. 2021-09-12T18:22:20.55 0.1 positive manual P 222 0.2797 50 -0.03 99
IV.MPPT.EHZ. 2021-09-12T18:22:20.81 0.3 positive manual P 170 0.2986 50 -0.1 73
IV.VISG.HHE. 2021-09-12T18:22:20.83 0.1 undecidable manual P 102 0.3049 50 -0.18 96
IV.ZCCA.HHZ. 2021-09-12T18:22:19.91 0.1 undecidable manual S 343 0.1034 131 0.39 95
IV.FNVD.HHZ. 2021-09-12T18:22:19.93 0.1 undecidable manual S 138 0.1124 129 0.14 100
IV.FNVD.HHZ. 2021-09-12T18:22:17.25 0.1 positive manual P 138 0.1124 129 -0.2 99
IV.ZCCA.HHZ. 2021-09-12T18:22:16.87 0.3 positive manual P 343 0.1034 131 -0.42 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ZCCA.HHE. ML:1 0.0001315 0.24 AML other m 2021-09-12T18:22:20.28
IV.ZCCA.HHN. ML:0.9 8.895359E-5 0.3584 AML other m 2021-09-12T18:22:20.32
IV.FNVD.HHE. ML:1.1 0.0001393843 0.3456 AML other m 2021-09-12T18:22:21.45
IV.FNVD.HHN. ML:1.1 0.0001476564 0.0896 AML other m 2021-09-12T18:22:21.57
IV.MOCL.EHE. ML:1.2 7.645E-5 0.18 AML other m 2021-09-12T18:22:25.46
GU.POPM.HHN. ML:1.4 0.0001315 0.18 AML other m 2021-09-12T18:22:26.12
GU.POPM.HHE. ML:1.4 0.0001245 0.16 AML other m 2021-09-12T18:22:26.11
IV.MOCL.EHN. ML:0.9 3.7431703E-5 0.1408 AML other m 2021-09-12T18:22:25.56
IV.MPPT.EHE. ML:1.1 4.925E-5 0.2 AML other m 2021-09-12T18:22:26.59
IV.MPPT.EHN. ML:0.9 3.7050485E-5 0.1536 AML other m 2021-09-12T18:22:26.75
IV.ZCCA.HNE. ML:1 0.000126928845 0.6144 AML other m 2021-09-12T18:22:23.04
IV.ZCCA.HNN. ML:1.2 0.0001839465 0.7936 AML other m 2021-09-12T18:22:21.03
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