Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 10-12-2020 and time 23:40:31 (UTC) in region 3 km E Dozza (BO)

A magnitude ML 1.4 earthquake occured in region: 3 km E Dozza (BO), on

  • 10-12-2020 23:40:31 (UTC)
  • 11-12-2020 00:40:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3520, 11.6710 at 32 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
Dozza BO 3 6652 6652
Imola BO 4 69797 76449
Casalfiumanese BO 7 3438 79887
Castel San Pietro Terme BO 8 20811 100698
Castel Guelfo di Bologna BO 9 4455 105153
Riolo Terme RA 9 5720 110873
Borgo Tossignano BO 10 3288 114161
Castel Bolognese RA 11 9554 123715
Mordano BO 12 4760 128475
Bagnara di Romagna RA 13 2429 130904
Fontanelice BO 14 1943 132847
Solarolo RA 14 4488 137335
Medicina BO 14 16739 154074
Casola Valsenio RA 15 2617 156691
Brisighella RA 16 7639 164330
Massa Lombarda RA 17 10653 174983
Sant'Agata sul Santerno RA 18 2862 177845
Faenza RA 18 58541 236386
Ozzano dell'Emilia BO 19 13596 249982

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km W of Imola (69797 inhabitants)
18 Km W of Faenza (58541 inhabitants)
31 Km SE of Bologna (386663 inhabitants)
33 Km W of Forlì (117913 inhabitants)
43 Km W of Ravenna (159116 inhabitants)
51 Km W of Cesena (96758 inhabitants)
54 Km S of Ferrara (133155 inhabitants)
68 Km E of Modena (184973 inhabitants)
70 Km NE of Prato (191150 inhabitants)
73 Km NE of Firenze (382808 inhabitants)
76 Km NE of Pistoia (90315 inhabitants)
77 Km NE of Scandicci (50609 inhabitants)
78 Km W of Rimini (147750 inhabitants)
79 Km SE of Carpi (70699 inhabitants)
81 Km S of Rovigo (51867 inhabitants)
91 Km E of Reggio nell'Emilia (171345 inhabitants)
100 Km N of Arezzo (99543 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 1.4 2020-12-10
23:40:31		 44.3518 11.6707 32 2021-02-26
14:56:19		 Bollettino Sismico Italiano INGV 87309851
Reviewed
Rev100 		ML 1.4 2020-12-10
23:40:31		 44.337 11.6513 34 2020-12-10
23:49:18		 Sala Sismica INGV-Roma 85348881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-10 23:40:31 ± 0.25
Latitude 44.3518 ± 0.0072
Longitude 11.6707 ± 0.0113
Depth (km) 32 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87309851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1006
Semi-minor axis of confidence ellipse (meter) 127
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 1010.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 14
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) 0.43257
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 87309851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-20 00:39:39

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 85348881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-10 23:49:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.IFIL.HHZ. 2020-12-10T23:42:14.95 3.0 negative manual Pg 11.19 0
GU.RNCA.HHZ. 2020-12-10T23:41:45.79 3.0 undecidable manual Sg 7.1 0
CR.STON.BHZ. 2020-12-10T23:41:30.96 3.0 negative manual Pn -6.78 0
IV.PE3.EHZ. 2020-12-10T23:41:05.52 3.0 undecidable manual Sg 1.13 0
IV.RONT.HHN. 2020-12-10T23:40:48.17 0.6 undecidable manual S 206 44.0226 122 0.31 46
IV.FNVD.HHZ. 2020-12-10T23:40:48.51 0.6 undecidable manual S 245 48.0186 119 -0.29 46
IV.FIU.EHE. 2020-12-10T23:40:45.76 1.0 undecidable manual S 336 35.0427 129 -0.14 25
IV.LMD.HHZ. 2020-12-10T23:40:44.49 0.6 undecidable manual S 175 30.5472 133 -0.51 45
IV.CRTC.HHZ. 2020-12-10T23:40:44.57 3.0 negative manual P -5.67 0
IV.MTRZ.HHZ. 2020-12-10T23:40:43.33 0.3 undecidable manual S 258 19.9689 146 0.18 73
IV.BRIS.HHZ. 2020-12-10T23:40:42.72 0.3 undecidable manual S 152 16.0728 151 0.13 75
IV.RONT.HHN. 2020-12-10T23:40:41.29 0.3 undecidable manual P 206 44.0226 122 0.14 72
IV.IMOL.EHZ. 2020-12-10T23:40:41.64 0.6 undecidable manual S 81 5.7942 169 -0.01 52
IV.FNVD.HHZ. 2020-12-10T23:40:41.70 0.6 undecidable manual P 245 48.0186 119 0.01 49
IV.FIU.EHE. 2020-12-10T23:40:40.55 1.0 undecidable manual P 336 35.0427 129 0.53 22
IV.LMD.HHZ. 2020-12-10T23:40:39.42 0.3 undecidable manual P 175 30.5472 133 -0.07 74
IV.BRIS.HHZ. 2020-12-10T23:40:38.25 0.1 negative manual P 152 16.0728 151 0.14 100
IV.MTRZ.HHZ. 2020-12-10T23:40:38.16 0.3 undecidable manual P 258 19.9689 146 -0.27 73
IV.IMOL.EHZ. 2020-12-10T23:40:37.43 0.3 undecidable manual P 81 5.7942 169 -0.14 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.IMOL.HNE. ML:1.5 0.0001359959365 0.7424 AML other m 2020-12-10T23:40:42.14
IV.BRIS.HNE. ML:1.0 0.0000441400235 0.976 AML other m 2020-12-10T23:40:42.08
IV.BRIS.HHN. ML:1.2 0.00006114544 1.0144 AML other m 2020-12-10T23:40:42.10
IV.IMOL.HNN. ML:1.6 0.00018822254999999999 0.1792 AML other m 2020-12-10T23:40:43.65
IV.MTRZ.HNE. ML:1.4 0.00010269898000000001 0.576 AML other m 2020-12-10T23:40:43.69
IV.MTRZ.HNN. ML:1.6 0.00013636304 0.7296 AML other m 2020-12-10T23:40:43.75
IV.BRIS.HNN. ML:1.8 0.00024940804999999997 0.8736 AML other m 2020-12-10T23:40:44.11
IV.MTRZ.HHE. ML:1.6 0.00016631715 0.5504 AML other m 2020-12-10T23:40:44.93
IV.LMD.HHN. ML:0.9 0.000023851622000000004 0.6912 AML other m 2020-12-10T23:40:44.96
IV.LMD.HHE. ML:0.7 0.0000151744935 0.1536 AML other m 2020-12-10T23:40:45.22
IV.MTRZ.HHN. ML:1.5 0.00013190859999999999 0.384 AML other m 2020-12-10T23:40:45.32
IV.BRIS.HHE. ML:1.3 0.0000828 1.58 AML other m 2020-12-10T23:40:50.83
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