Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 28-12-2020 and time 02:21:13 (UTC) in region 3 km SW Dozza (BO)

A magnitude ML 1.6 earthquake occured in region: 3 km SW Dozza (BO), on

  • 28-12-2020 02:21:13 (UTC)
  • 28-12-2020 03:21:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3410, 11.6020 at 26 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
Casalfiumanese BO 5 3438 10090
Castel San Pietro Terme BO 7 20811 30901
Borgo Tossignano BO 7 3288 34189
Imola BO 9 69797 103986
Fontanelice BO 10 1943 105929
Castel Guelfo di Bologna BO 12 4455 110384
Riolo Terme RA 12 5720 116104
Casola Valsenio RA 13 2617 118721
Ozzano dell'Emilia BO 15 13596 132317
Medicina BO 16 16739 149056
Monterenzio BO 16 6035 155091
Castel Bolognese RA 16 9554 164645
Castel del Rio BO 16 1246 165891
Mordano BO 18 4760 170651
Bagnara di Romagna RA 19 2429 173080
Brisighella RA 19 7639 180719
Solarolo RA 19 4488 185207

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km W of Imola (69797 inhabitants)
23 Km W of Faenza (58541 inhabitants)
27 Km SE of Bologna (386663 inhabitants)
37 Km W of Forlì (117913 inhabitants)
48 Km W of Ravenna (159116 inhabitants)
55 Km S of Ferrara (133155 inhabitants)
56 Km W of Cesena (96758 inhabitants)
63 Km SE of Modena (184973 inhabitants)
65 Km NE of Prato (191150 inhabitants)
69 Km NE of Firenze (382808 inhabitants)
71 Km NE of Pistoia (90315 inhabitants)
73 Km NE of Scandicci (50609 inhabitants)
75 Km SE of Carpi (70699 inhabitants)
83 Km S of Rovigo (51867 inhabitants)
83 Km W of Rimini (147750 inhabitants)
87 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 1.6 2020-12-28
02:21:13		 44.3412 11.6018 26 2021-02-26
14:56:15		 Bollettino Sismico Italiano INGV 86354921
Reviewed
Rev100 		ML 1.7 2020-12-28
02:21:13		 44.3502 11.5687 27 2020-12-28
02:34:08		 Sala Sismica INGV-Roma 85767481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-28 02:21:13 ± 0.18
Latitude 44.3412 ± 0.0063
Longitude 11.6018 ± 0.0101
Depth (km) 26 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86354921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 790
Semi-minor axis of confidence ellipse (meter) 77
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 283
Circular confidence region, given by single value of horizontal uncertainty (meter) 790.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.10252
Epicentral distance of station farthest from the epicenter (degree) 0.53869
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 85767481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-28 02:34:08

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 86354921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-27 17:00:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RONT.HHN. 2020-12-28T02:21:28.74 0.6 undecidable manual S 199 40.8258 116 0.61 43
IV.SEI.HHZ. 2020-12-28T02:21:27.42 0.6 undecidable manual S 211 37.2294 119 0.14 49
IV.BRSN.HNE. 2020-12-28T02:21:27.75 0.6 undecidable manual S 99 38.5281 118 0.18 48
IV.FIU.EHE. 2020-12-28T02:21:26.61 0.6 undecidable manual S 345 34.3434 121 0.01 51
IV.LMD.HHZ. 2020-12-28T02:21:25.74 0.6 undecidable manual S 164 30.4473 125 0.01 51
IV.RAVA.EHN. 2020-12-28T02:21:24.78 0.1 undecidable manual P 320 59.7957 107 -0.02 96
IV.RUFI.EHZ. 2020-12-28T02:21:24.25 1.0 undecidable manual P 188 56.2992 109 -0.04 24
IV.SFI.EHZ. 2020-12-28T02:21:23.59 0.3 undecidable manual P 158 52.2033 110 -0.1 73
IV.MTRZ.HHZ. 2020-12-28T02:21:23.78 0.6 undecidable manual S 257 14.3745 148 1.05 39
IV.BRIS.HHZ. 2020-12-28T02:21:23.62 0.6 undecidable manual S 135 18.3705 141 0.26 49
IV.VISG.HHZ. 2020-12-28T02:21:23.56 0.3 undecidable manual S 218 21.4674 136 -0.35 72
IV.RINC.HHN. 2020-12-28T02:21:23.83 0.3 undecidable manual P 180 50.4162 111 0.39 68
IV.IMOL.EHZ. 2020-12-28T02:21:22.35 0.6 undecidable manual S 80 11.3775 154 0.02 53
IV.RONT.HHN. 2020-12-28T02:21:22.63 0.6 undecidable manual P 199 40.8258 116 0.55 44
IV.FIU.EHE. 2020-12-28T02:21:21.45 0.6 undecidable manual P 345 34.3434 121 0.26 49
IV.SEI.HHZ. 2020-12-28T02:21:21.28 0.6 undecidable manual P 211 37.2294 119 -0.31 48
IV.BRSN.HNE. 2020-12-28T02:21:21.61 0.6 undecidable manual P 99 38.5281 118 -0.14 50
IT.FAZ.HNN. 2020-12-28T02:21:20.21 0.6 undecidable manual P 102 23.4543 133 0.36 48
IV.LMD.HHZ. 2020-12-28T02:21:20.17 0.3 undecidable manual P 164 30.4473 125 -0.52 69
IV.MTRZ.HHZ. 2020-12-28T02:21:19.16 0.3 undecidable manual P 257 14.3745 148 0.2 76
IV.BRIS.HHZ. 2020-12-28T02:21:19.06 0.1 negative manual P 135 18.3705 141 -0.26 100
IV.VISG.HHZ. 2020-12-28T02:21:18.78 0.3 undecidable manual P 218 21.4674 136 -0.86 61
IV.IMOL.EHZ. 2020-12-28T02:21:18.33 0.3 undecidable manual P 80 11.3775 154 -0.4 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HNE. ML:1.4 0.00011256945 1.2 AML other m 2020-12-28T02:21:24.66
IV.IMOL.HNN. ML:1.9 0.00044338940000000006 0.1904 AML other m 2020-12-28T02:21:24.12
IV.VISG.HHE. ML:1.3 0.00008572964 0.1008 AML other m 2020-12-28T02:21:24.14
IV.BRIS.HHN. ML:1.5 0.00015732347 0.7392 AML other m 2020-12-28T02:21:23.80
IV.VISG.HHN. ML:1.4 0.000120096655 0.1392 AML other m 2020-12-28T02:21:24.42
IV.IMOL.HNE. ML:1.7 0.00027179799999999996 0.1808 AML other m 2020-12-28T02:21:24.66
IV.MTRZ.HNE. ML:2.0 0.00051748545 0.5616 AML other m 2020-12-28T02:21:25.74
IV.MTRZ.HHE. ML:1.9 0.000404939 0.4 AML other m 2020-12-28T02:21:25.73
IV.MTRZ.HNN. ML:1.7 0.00028606845000000004 0.3808 AML other m 2020-12-28T02:21:26.30
IV.MTRZ.HHN. ML:1.7 0.00027640280000000003 0.4208 AML other m 2020-12-28T02:21:26.34
IV.SEI.HHN. ML:1.7 0.00016207625000000002 0.48 AML other m 2020-12-28T02:21:28.37
IV.BRIS.HHE. ML:1.6 0.00019352764999999998 0.4208 AML other m 2020-12-28T02:21:31.62
IV.LMD.HHE. ML:1.2 0.00006007021 0.32 AML other m 2020-12-28T02:21:32.81
IV.LMD.HHN. ML:1.3 0.000069847295 0.2992 AML other m 2020-12-28T02:21:32.80
IV.SFI.HNN. ML:1.8 0.00015165760000000002 0.9408 AML other m 2020-12-28T02:21:37.04
IV.SEI.HHE. ML:1.2 0.000051429195000000005 1.6 AML other m 2020-12-28T02:21:37.98
IV.SFI.HNE. ML:1.9 0.0001626654 0.7696 AML other m 2020-12-28T02:21:44.70
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