Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 09-02-2021 and time 01:58:17 (Italy) in region 1 km SE Castiglione dei Pepoli (BO)

A magnitude ML 1.6 earthquake occured in region: 1 km SE Castiglione dei Pepoli (BO), on

  • 09-02-2021 00:58:17 (UTC)
  • 09-02-2021 01:58:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1330, 11.1670 at 10 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
Castiglione dei Pepoli BO 2 5648 5648
Camugnano BO 8 1885 7533
Vernio PO 9 6060 13593
San Benedetto Val di Sambro BO 11 4315 17908
Castel di Casio BO 11 3448 21356
Cantagallo PO 12 3105 24461
Sambuca Pistoiese PT 14 1626 26087
Grizzana Morandi BO 14 3916 30003
Alto Reno Terme BO 15 6960 36963
Monghidoro BO 16 3749 40712
Barberino di Mugello FI 16 10836 51548
Firenzuola FI 17 4726 56274
Vergato BO 17 7639 63913
Monzuno BO 18 6328 70241
Vaiano PO 19 9895 80136
Loiano BO 20 4294 84430
Gaggio Montano BO 20 4878 89308

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of Prato (191150 inhabitants)
30 Km NE of Pistoia (90315 inhabitants)
41 Km N of Firenze (382808 inhabitants)
42 Km N of Scandicci (50609 inhabitants)
43 Km SW of Bologna (386663 inhabitants)
50 Km W of Imola (69797 inhabitants)
60 Km W of Faenza (58541 inhabitants)
60 Km SE of Modena (184973 inhabitants)
62 Km NE of Lucca (89046 inhabitants)
71 Km W of Forlì (117913 inhabitants)
76 Km SE of Carpi (70699 inhabitants)
76 Km SE of Reggio nell'Emilia (171345 inhabitants)
77 Km NE of Pisa (89158 inhabitants)
79 Km E of Viareggio (62467 inhabitants)
83 Km E of Massa (69479 inhabitants)
86 Km E of Carrara (63133 inhabitants)
86 Km W of Cesena (96758 inhabitants)
86 Km SW of Ferrara (133155 inhabitants)
88 Km W of Ravenna (159116 inhabitants)
92 Km N of Siena (53903 inhabitants)
94 Km NW of Arezzo (99543 inhabitants)
94 Km NE of Livorno (159219 inhabitants)
100 Km SE of Parma (192836 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 1.6 2021-02-09
00:58:17		 44.1328 11.167 10 2021-07-12
16:55:01		 Bollettino Sismico Italiano INGV 87945691
Reviewed
Rev100 		ML 1.7 2021-02-09
00:58:17		 44.1353 11.1732 9 2021-03-26
15:16:59		 Sala Sismica INGV-Roma 86952821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-09 00:58:17 ± 0.07
Latitude 44.1328 ± 0.0045
Longitude 11.1670 ± 0.0050
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87945691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 386
Semi-minor axis of confidence ellipse (meter) 341
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 189
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39210
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 21
Type of magnitude ML
Reference to an origin 86952821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-09 01:09:35

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 87945691
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-26 15:16:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NARO.HHZ. 2021-02-09T00:58:43.04 3.0 undecidable manual S 0
IV.NARO.HHZ. 2021-02-09T00:58:36.48 3.0 undecidable manual P 0
IV.BADI.EHZ. 2021-02-09T00:58:34.04 3.0 undecidable manual S 0
IV.ATFO.HHZ. 2021-02-09T00:58:34.74 3.0 positive manual P 2.12 0
IV.ASQU.HHZ. 2021-02-09T00:58:33.26 3.0 undecidable manual Sg 0
IV.SSP9.EHZ. 2021-02-09T00:58:31.97 3.0 undecidable manual Sg 0
IV.BADI.EHZ. 2021-02-09T00:58:29.14 3.0 negative manual P 0.31 0
IV.PARC.HHZ. 2021-02-09T00:58:29.93 3.0 undecidable manual Sg 0
GU.POPM.HHZ. 2021-02-09T00:58:29.35 0.3 undecidable manual S 254 34.1436 50 -0.28 67
IV.ASQU.HHZ. 2021-02-09T00:58:28.79 3.0 undecidable manual P 0
IV.CRE.HHZ. 2021-02-09T00:58:28.33 3.0 undecidable manual P 0
IV.RONT.HHZ. 2021-02-09T00:58:27.38 0.6 undecidable manual S 126 26.2515 110 -0.04 48
IV.SSP9.EHZ. 2021-02-09T00:58:27.97 3.0 negative manual P 0.57 0
IV.PARC.HHZ. 2021-02-09T00:58:26.84 3.0 undecidable manual P -0.88 0
IV.RUFI.EHZ. 2021-02-09T00:58:26.39 0.6 undecidable manual P 140 42.624 50 0.48 43
IV.LMD.HHZ. 2021-02-09T00:58:26.20 0.3 undecidable manual P 98 43.5231 50 0.16 69
IV.MPPT.EHZ. 2021-02-09T00:58:25.70 0.6 undecidable manual S 197 20.3685 115 0.15 48
GU.POPM.HHZ. 2021-02-09T00:58:24.42 0.3 undecidable manual P 254 34.1436 50 -0.18 69
IV.SEI.HHZ. 2021-02-09T00:58:24.45 0.6 undecidable manual S 120 17.5713 119 -0.23 47
IV.ZCCA.HNN. 2021-02-09T00:58:24.07 0.3 undecidable manual P 328 28.5492 50 0.33 68
IV.MOCL.EHZ. 2021-02-09T00:58:23.91 0.6 undecidable manual S 176 14.2746 124 0.22 47
IV.MTRZ.HHZ. 2021-02-09T00:58:23.83 0.1 undecidable manual P 46 28.6491 50 0.08 96
IV.RONT.HHZ. 2021-02-09T00:58:23.09 0.3 undecidable manual P 126 26.2515 110 -0.24 70
IV.MPPT.EHZ. 2021-02-09T00:58:22.27 0.1 undecidable manual P 197 20.3685 115 0.03 98
IV.FNVD.HHZ. 2021-02-09T00:58:21.32 0.6 undecidable manual S 318 5.1948 151 -0.19 50
IV.MOCL.EHZ. 2021-02-09T00:58:21.32 0.1 positive manual P 176 14.2746 124 0.15 96
IV.SEI.HHZ. 2021-02-09T00:58:21.49 0.1 undecidable manual P 120 17.5713 119 -0.25 94
IV.FNVD.HHZ. 2021-02-09T00:58:19.92 0.1 undecidable manual P 318 5.1948 151 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOCL.EHE. ML:1.6 0.00041349999999999997 0.08 AML other m 2021-02-09T00:58:24.02
IV.MOCL.EHN. ML:2.0 0.0010595 0.16 AML other m 2021-02-09T00:58:24.16
IV.SEI.HHN. ML:1.8 0.0006355 0.8 AML other m 2021-02-09T00:58:24.53
IV.SEI.HHE. ML:1.8 0.000503 0.34 AML other m 2021-02-09T00:58:25.85
IV.MPPT.EHN. ML:1.5 0.00021799999999999999 0.5 AML other m 2021-02-09T00:58:26.33
IV.MPPT.EHE. ML:1.2 0.000124 0.72 AML other m 2021-02-09T00:58:26.51
IV.RONT.HHE. ML:1.7 0.0002675 0.88 AML other m 2021-02-09T00:58:27.19
IV.RONT.HHN. ML:1.6 0.00022000000000000003 0.18 AML other m 2021-02-09T00:58:28.73
IV.ASQU.HHE. ML:1.4 0.000050628074999999996 0.28 AML other m 2021-02-09T00:58:33.67
IV.ASQU.HHN. ML:1.2 0.000029246964 0.22 AML other m 2021-02-09T00:58:34.75
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