Earthquake with magnitude of ML 2.1 on date 13-12-2020 and time 13:12:43 (Italy) in region 3 km NW Borgo Tossignano (BO)

A magnitude ML 2.1 earthquake occured in region: 3 km NW Borgo Tossignano (BO), on

  • 13-12-2020 12:12:43 (UTC)
  • 13-12-2020 13:12:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3, 11.577 at 23 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Borgo Tossignano BO 3 3288 3288
Casalfiumanese BO 3 3438 6726
Fontanelice BO 5 1943 8669
Dozza BO 8 6652 15321
Casola Valsenio RA 9 2617 17938
Castel del Rio BO 11 1246 19184
Castel San Pietro Terme BO 11 20811 39995
Riolo Terme RA 12 5720 45715
Imola BO 13 69797 115512
Monterenzio BO 14 6035 121547
Castel Guelfo di Bologna BO 17 4455 126002
Brisighella RA 18 7639 133641
Castel Bolognese RA 18 9554 143195
Ozzano dell'Emilia BO 18 13596 156791

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km W of Imola (69797 inhabitants)
25 Km W of Faenza (58541 inhabitants)
29 Km SE of Bologna (386663 inhabitants)
38 Km W of Forlì (117913 inhabitants)
51 Km W of Ravenna (159116 inhabitants)
56 Km W of Cesena (96758 inhabitants)
60 Km S of Ferrara (133155 inhabitants)
60 Km NE of Prato (191150 inhabitants)
64 Km NE of Firenze (382808 inhabitants)
64 Km SE of Modena (184973 inhabitants)
66 Km NE of Pistoia (90315 inhabitants)
68 Km NE of Scandicci (50609 inhabitants)
77 Km SE of Carpi (70699 inhabitants)
83 Km W of Rimini (147750 inhabitants)
87 Km SE of Reggio nell'Emilia (171345 inhabitants)
88 Km S of Rovigo (51867 inhabitants)
96 Km N of Arezzo (99543 inhabitants)
100 Km NE of Lucca (89046 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.1 2020-12-13
12:12:43
44.2995 11.5767 23 2021-02-26
14:56:18
Bollettino Sismico Italiano INGV 86973271
Reviewed
Rev100
ML 2.1 2020-12-13
12:12:43
44.2927 11.5592 21 2020-12-13
12:27:47
Sala Sismica INGV-Roma 85401211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-13 12:12:43 ± 0.22
Latitude 44.2995 ± 0.0117
Longitude 11.5767 ± 0.0138
Depth (km) 23 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86973271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1330
Semi-minor axis of confidence ellipse (meter) 672
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 356
Circular confidence region, given by single value of horizontal uncertainty (meter) 1330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.6619
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 21
Type of magnitude ML
Reference to an origin 86973271
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-09 15:04:59

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 85401211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-13 12:27:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VENL.HNZ. 2020-12-13T12:13:23.67 3.0 undecidable manual S -0.16 0
IV.MOCL.EHZ. 2020-12-13T12:12:58.88 0.3 undecidable manual S 224 0.4092 110 0.72 62
IV.FNVD.HHZ. 2020-12-13T12:12:56.83 0.3 undecidable manual S 248 0.3507 114 0.28 71
IV.RONT.HHZ. 2020-12-13T12:12:56.47 0.6 undecidable manual S 199 0.3229 116 0.67 43
IV.CRMI.HNN. 2020-12-13T12:12:56.63 0.6 undecidable manual P 221 0.6619 101 0.7 39
IV.SEI.HHZ. 2020-12-13T12:12:54.95 0.6 undecidable manual S 213 0.2905 119 -0.01 50
IV.LMD.HHZ. 2020-12-13T12:12:54.18 0.6 undecidable manual S 157 0.241 125 0.48 46
IV.ASQU.HHE. 2020-12-13T12:12:53.76 0.6 undecidable manual P 163 0.5252 105 0.11 47
IV.MPPT.EHN. 2020-12-13T12:12:53.05 0.6 undecidable manual P 226 0.4883 106 0 48
IV.RUFI.EHZ. 2020-12-13T12:12:52.64 0.6 undecidable manual P 186 0.4641 107 0 49
IV.ZCCA.HHZ. 2020-12-13T12:12:52.50 0.3 undecidable manual P 277 0.4326 109 0.37 68
IV.BRIS.HHZ. 2020-12-13T12:12:52.02 0.3 undecidable manual S 119 0.1556 139 0.22 74
IV.RINC.HHZ. 2020-12-13T12:12:52.01 0.3 undecidable manual P 177 0.4137 110 0.19 71
IV.VISG.HHZ. 2020-12-13T12:12:51.34 0.3 undecidable manual S 223 0.1502 140 -0.36 71
IV.FIU.EHN. 2020-12-13T12:12:51.54 1.0 undecidable manual P 350 0.3462 114 0.79 20
IV.MTRZ.HHZ. 2020-12-13T12:12:51.33 0.6 undecidable manual S 277 0.1097 149 0.34 49
IV.MOCL.EHZ. 2020-12-13T12:12:51.42 0.3 undecidable manual P 224 0.4092 110 -0.33 69
IV.IMOL.EHZ. 2020-12-13T12:12:51.95 0.3 undecidable manual S 63 0.1331 143 0.57 68
IV.CMPO.HNE. 2020-12-13T12:12:51.20 0.6 undecidable manual P 30 0.3256 116 0.77 40
IV.FNVD.HHZ. 2020-12-13T12:12:50.47 0.3 undecidable manual P 248 0.3507 114 -0.36 69
IV.RONT.HHZ. 2020-12-13T12:12:50.37 0.3 undecidable manual P 199 0.3229 116 -0.02 75
IV.SEI.HHZ. 2020-12-13T12:12:49.55 0.3 undecidable manual P 213 0.2905 119 -0.35 70
IV.LMD.HHZ. 2020-12-13T12:12:48.69 0.3 undecidable manual P 157 0.241 125 -0.49 69
IV.IMOL.EHZ. 2020-12-13T12:12:47.62 0.1 undecidable manual P 63 0.1331 143 -0.22 100
IV.BRIS.HHZ. 2020-12-13T12:12:47.80 0.1 undecidable manual P 119 0.1556 139 -0.28 98
IV.VISG.HHZ. 2020-12-13T12:12:47.07 0.1 undecidable manual P 223 0.1502 140 -0.95 77
IV.MTRZ.HHZ. 2020-12-13T12:12:47.19 0.1 undecidable manual P 277 0.1097 149 -0.43 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHN. ML:0 0.00059778755 0.1216 AML other m 2020-12-13T12:12:51.92
IV.VISG.HHE. ML:0 0.0009758352 0.16 AML other m 2020-12-13T12:12:52.04
IV.BRIS.HHE. ML:2 0.000519 0.44 AML other m 2020-12-13T12:12:52.21
IV.MTRZ.HHN. ML:2.2 0.0010082661 0.2368 AML other m 2020-12-13T12:12:54.36
IV.MTRZ.HNN. ML:2.2 0.0009123983 0.2496 AML other m 2020-12-13T12:12:54.36
IV.IMOL.HNE. ML:0 0.0009492983 0.2176 AML other m 2020-12-13T12:12:53.88
IV.LMD.HHN. ML:2 0.000423 0.26 AML other m 2020-12-13T12:12:54.76
IV.LMD.HHE. ML:2 0.00046398585 0.3008 AML other m 2020-12-13T12:12:54.70
IV.MTRZ.HHE. ML:2.1 0.0007945 0.26 AML other m 2020-12-13T12:12:55.57
IV.MTRZ.HNE. ML:2.1 0.0007855 0.28 AML other m 2020-12-13T12:12:55.58
IV.SEI.HHN. ML:2.7 0.00167 0.46 AML other m 2020-12-13T12:12:55.74
IV.BRIS.HHN. ML:1.8 0.0003162307 0.3776 AML other m 2020-12-13T12:12:58.31
IV.FNVD.HHE. ML:1.9 0.00023946325 0.1984 AML other m 2020-12-13T12:12:57.14
IV.SEI.HHE. ML:2.3 0.000758 0.34 AML other m 2020-12-13T12:12:57.42
IV.FNVD.HHN. ML:2 0.0002819337 0.16 AML other m 2020-12-13T12:12:57.51
IV.RONT.HHN. ML:2.2 0.00054401625 0.32 AML other m 2020-12-13T12:12:57.40
IV.RONT.HHE. ML:2.4 0.00090315715 0.2176 AML other m 2020-12-13T12:12:58.28
IV.RINC.HHE. ML:0 0.000275665 0.3456 AML other m 2020-12-13T12:12:59.95
IV.RINC.HHN. ML:0 0.00022448585 0.32 AML other m 2020-12-13T12:13:00.64
IV.RUFI.EHN. ML:1.4 5.5577535E-5 0.5184 AML other m 2020-12-13T12:13:03.80
IV.RUFI.EHE. ML:1.5 6.301515E-5 0.4224 AML other m 2020-12-13T12:13:05.83
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download