Earthquake with magnitude of ML 1.6 on date 09-09-2021 and time 12:08:13 (Italy) in region 2 km NE Castel d'Aiano (BO)

A magnitude ML 1.6 earthquake occured in region: 2 km NE Castel d'Aiano (BO), on

  • 09-09-2021 10:08:13 (UTC)
  • 09-09-2021 12:08:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.296, 11.022 at 27 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 2 1906 1906
Zocca MO 6 4719 6625
Montese MO 7 3353 9978
Vergato BO 7 7639 17617
Grizzana Morandi BO 11 3916 21533
Gaggio Montano BO 13 4878 26411
Castel di Casio BO 15 3448 29859
Camugnano BO 15 1885 31744
Marzabotto BO 16 6779 38523
Guiglia MO 16 3931 42454
Pavullo nel Frignano MO 16 17383 59837
Alto Reno Terme BO 16 6960 66797
Lizzano in Belvedere BO 18 2212 69009
Marano sul Panaro MO 18 5060 74069
San Benedetto Val di Sambro BO 19 4315 78384

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Bologna (386663 inhabitants)
40 Km S of Modena (184973 inhabitants)
41 Km N of Pistoia (90315 inhabitants)
47 Km N of Prato (191150 inhabitants)
54 Km SE of Reggio nell'Emilia (171345 inhabitants)
55 Km S of Carpi (70699 inhabitants)
56 Km W of Imola (69797 inhabitants)
61 Km N of Scandicci (50609 inhabitants)
62 Km NW of Firenze (382808 inhabitants)
65 Km NE of Lucca (89046 inhabitants)
69 Km W of Faenza (58541 inhabitants)
76 Km E of Massa (69479 inhabitants)
77 Km SW of Ferrara (133155 inhabitants)
78 Km E of Carrara (63133 inhabitants)
78 Km NE of Viareggio (62467 inhabitants)
79 Km SE of Parma (192836 inhabitants)
81 Km NE of Pisa (89158 inhabitants)
82 Km W of Forlì (117913 inhabitants)
95 Km W of Ravenna (159116 inhabitants)
97 Km E of La Spezia (93959 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 1.6 2021-09-09
10:08:13
44.2965 11.0223 27 2021-09-09
10:18:24
Sala Sismica INGV-Roma 95231391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-09 10:08:13 ± 0.31
Latitude 44.2965 ± 0.0117
Longitude 11.0223 ± 0.0113
Depth (km) 27 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95231391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1122
Semi-minor axis of confidence ellipse (meter) 829
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 18
Circular confidence region, given by single value of horizontal uncertainty (meter) 1120
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 166
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 16
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
Epicentral distance of station farthest from the epicenter (degree) 0.45865
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 95231391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-09 10:18:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SERS.HHZ. 2021-09-09T10:09:55.86 3.0 positive manual Pn 1.86 0
IV.ALJA.HHZ. 2021-09-09T10:09:51.97 3.0 undecidable manual Pn -2.48 0
IV.RNI2.HHZ. 2021-09-09T10:09:50.74 3.0 undecidable manual Sn -0.96 0
TV.SU26.HHZ. 2021-09-09T10:09:45.83 3.0 undecidable manual Pg 11.26 0
OT.OT05.EHZ. 2021-09-09T10:09:38.31 3.0 undecidable manual Pg 17.91 0
IT.RMVT.HGZ. 2021-09-09T10:09:36.82 3.0 undecidable manual Sg 8.12 0
IV.SGRT.HHZ. 2021-09-09T10:09:35.58 3.0 undecidable manual Pg 14.79 0
IV.PP3.EHZ. 2021-09-09T10:09:17.36 3.0 undecidable manual Sn -2.3 0
IV.POFI.HHZ. 2021-09-09T10:09:03.97 3.0 undecidable manual Pn -1.73 0
IV.APEC.HHZ. 2021-09-09T10:09:01.12 3.0 undecidable manual S 2.45 0
IV.TREG.EHZ. 2021-09-09T10:09:00.83 3.0 undecidable manual S 1.2 0
IV.ZEN8.EHZ. 2021-09-09T10:08:56.41 3.0 undecidable manual S -5.57 0
OX.CAE.HHZ. 2021-09-09T10:08:54.75 3.0 undecidable manual Pg 4.27 0
GU.MGRO.HHZ. 2021-09-09T10:08:53.65 3.0 positive manual Pn 2.69 0
GU.IMI.HHZ. 2021-09-09T10:08:51.39 3.0 positive manual Pg 1.05 0
IV.SBPO.HNZ. 2021-09-09T10:08:45.75 3.0 undecidable manual S 0.09 0
IV.MCIV.CHZ. 2021-09-09T10:08:39.11 3.0 undecidable manual Pg -3.07 0
GU.SARM.EHZ. 2021-09-09T10:08:30.87 0.6 undecidable manual S 256 0.4587 112 0.05 48
IV.BDI.HHZ. 2021-09-09T10:08:28.73 0.3 undecidable manual S 233 0.3849 116 -0.08 74
IV.SEI.HHZ. 2021-09-09T10:08:27.92 0.6 undecidable manual S 135 0.3417 119 0.25 47
IV.MPPT.EHZ. 2021-09-09T10:08:27.91 0.6 undecidable manual S 172 0.3426 119 0.22 47
GU.GSCL.HHZ. 2021-09-09T10:08:27.04 0.3 undecidable manual S 280 0.3148 122 0.04 75
IV.MOCL.EHZ. 2021-09-09T10:08:26.88 0.6 undecidable manual S 159 0.313 122 -0.05 50
GU.SARM.EHZ. 2021-09-09T10:08:23.90 0.1 undecidable manual P 256 0.4587 112 0.21 94
IV.ZCCA.HHZ. 2021-09-09T10:08:22.92 0.3 undecidable manual S 329 0.0639 164 0.69 66
IV.SEI.HHZ. 2021-09-09T10:08:22.37 1.0 positive manual P 135 0.3417 119 0.5 23
IV.FNVD.HHZ. 2021-09-09T10:08:22.82 0.3 undecidable manual S 151 0.1475 145 -0.5 71
IV.BDI.HHZ. 2021-09-09T10:08:22.31 0.3 undecidable manual P 233 0.3849 116 -0.22 71
IV.MPPT.EHZ. 2021-09-09T10:08:22.08 0.1 undecidable manual P 172 0.3426 119 0.2 96
GU.GSCL.HHZ. 2021-09-09T10:08:21.15 0.6 undecidable manual P 280 0.3148 122 -0.33 47
IV.MOCL.EHZ. 2021-09-09T10:08:21.60 0.1 undecidable manual P 159 0.313 122 0.15 97
IV.ZCCA.HHZ. 2021-09-09T10:08:18.49 0.1 positive manual P 329 0.0639 164 -0.25 100
IV.FNVD.HHZ. 2021-09-09T10:08:18.94 0.1 undecidable manual P 151 0.1475 145 -0.42 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FNVD.HHE. ML:2.2 0.0007775 0.18 AML other m 2021-09-09T10:08:23.33
IV.ZCCA.HHE. ML:1.6 0.000225 0.34 AML other m 2021-09-09T10:08:23.34
IV.FNVD.HHN. ML:2.2 0.0007305 0.08 AML other m 2021-09-09T10:08:23.34
IV.ZCCA.HHN. ML:2 0.000551 0.48 AML other m 2021-09-09T10:08:23.83
GU.GSCL.HHN. ML:1.4 7.905E-5 0.98 AML other m 2021-09-09T10:08:29.02
IV.BDI.HHN. ML:1.6 9.285E-5 1.6 AML other m 2021-09-09T10:08:29.94
IV.BDI.HHE. ML:1.6 9.825E-5 0.4 AML other m 2021-09-09T10:08:29.64
GU.GSCL.HHE. ML:1.1 4.16E-5 1.14 AML other m 2021-09-09T10:08:31.69
IV.SEI.HHE. ML:1.3 6.145E-5 0.36 AML other m 2021-09-09T10:08:31.31
IV.SEI.HHN. ML:1.4 7.62E-5 0.46 AML other m 2021-09-09T10:08:31.58
IV.MCIV.CHE. ML:2.8 0.000234 0.22 AML other m 2021-09-09T10:08:46.65
IV.MCIV.CHN. ML:2.6 0.0001345 0.08 AML other m 2021-09-09T10:08:46.80
IV.SBPO.HNN. ML:2.9 0.0009085 1.04 AML other m 2021-09-09T10:08:47.22
IV.SBPO.HNE. ML:3.5 0.00371 0.06 AML other m 2021-09-09T10:08:49.17
IV.APEC.HHN. ML:1.8 3.725E-5 0.54 AML other m 2021-09-09T10:09:09.03
IV.APEC.HHE. ML:1.8 3.86E-5 0.52 AML other m 2021-09-09T10:09:11.04
GU.MGRO.HNN. ML:3 0.0001845 0.92 AML other m 2021-09-09T10:09:30.42
GU.MGRO.HNE. ML:3.2 0.0002771 0.72 AML other m 2021-09-09T10:09:36.37
IV.PP3.EHN. ML:3.4 0.0006065 0.14 AML other m 2021-09-09T10:09:54.19
IV.PP3.HNN. ML:3.4 0.000593 1.22 AML other m 2021-09-09T10:09:54.19
IV.PP3.HNE. ML:3.4 0.000595 0.52 AML other m 2021-09-09T10:09:55.18
IV.PP3.EHE. ML:3.4 0.0005465 0.08 AML other m 2021-09-09T10:09:55.26
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