Earthquake with magnitude of ML 1.9 on date 04-04-2020 and time 23:37:41 (UTC) in region 3 km W Borgo Tossignano (BO)

A magnitude ML 1.9 earthquake occured in region: 3 km W Borgo Tossignano (BO), on

  • 04-04-2020 23:37:41 (UTC)
  • 05-04-2020 01:37:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.29, 11.56 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.

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
Fontanelice BO 4 1943 5231
Casalfiumanese BO 5 3438 8669
Casola Valsenio RA 9 2617 11286
Castel del Rio BO 10 1246 12532
Dozza BO 10 6652 19184
Castel San Pietro Terme BO 12 20811 39995
Monterenzio BO 13 6035 46030
Riolo Terme RA 14 5720 51750
Imola BO 14 69797 121547
Ozzano dell'Emilia BO 18 13596 135143
Castel Guelfo di Bologna BO 19 4455 139598
Brisighella RA 19 7639 147237
Loiano BO 19 4294 151531
Castel Bolognese RA 20 9554 161085
Pianoro BO 20 17460 178545
Palazzuolo sul Senio FI 20 1154 179699

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Imola (69797 inhabitants)
26 Km W of Faenza (58541 inhabitants)
28 Km SE of Bologna (386663 inhabitants)
39 Km W of Forlì (117913 inhabitants)
53 Km W of Ravenna (159116 inhabitants)
57 Km W of Cesena (96758 inhabitants)
59 Km NE of Prato (191150 inhabitants)
61 Km S of Ferrara (133155 inhabitants)
63 Km NE of Firenze (382808 inhabitants)
64 Km SE of Modena (184973 inhabitants)
65 Km NE of Pistoia (90315 inhabitants)
66 Km NE of Scandicci (50609 inhabitants)
76 Km SE of Carpi (70699 inhabitants)
85 Km W of Rimini (147750 inhabitants)
86 Km SE of Reggio nell'Emilia (171345 inhabitants)
89 Km S of Rovigo (51867 inhabitants)
95 Km N of Arezzo (99543 inhabitants)
98 Km NE of Lucca (89046 inhabitants)
Recent and historical seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows 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 reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows 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 https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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 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
Bulletin
Rev1000
ML 1.9 2020-04-04
23:37:41
44.29 11.56 26 2020-07-18
21:08:36
Bollettino Sismico Italiano INGV 79132981
Reviewed
Rev100
ML 2.1 2020-04-04
23:37:41
44.31 11.54 26 2020-04-04
23:48:19
Sala Sismica INGV-Roma 77895881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-04 23:37:41 ± 0.3
Latitude 44.29 ± 0.01
Longitude 11.56 ± 0.02
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 79132981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1225
Semi-minor axis of confidence ellipse (meter) 202
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 104
Circular confidence region, given by single value of horizontal uncertainty (meter) 1230
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.09713
Epicentral distance of station farthest from the epicenter (degree) 0.45506
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 29
Type of magnitude ML
Reference to an origin 79132981
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-16 10:44:33

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 77895881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-04 23:48:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RUFI.EHZ. 2020-04-04T23:37:58.64 0.3 undecidable manual S 184 0.4551 110 0.12 70
IV.SFI.EHZ. 2020-04-04T23:37:58.71 0.3 undecidable manual S 152 0.4389 111 0.62 62
IV.RONT.HHZ. 2020-04-04T23:37:54.89 0.3 undecidable manual S 197 0.3112 120 0.23 70
IV.LMD.HHZ. 2020-04-04T23:37:53.12 0.1 undecidable manual S 153 0.2401 128 0.21 96
IV.SEI.HHZ. 2020-04-04T23:37:53.82 0.1 undecidable manual S 211 0.277 124 0.02 98
IV.IMOL.EHZ. 2020-04-04T23:37:51.54 0.1 undecidable manual S 63 0.1493 143 0.52 92
IV.SFI.EHZ. 2020-04-04T23:37:51.41 0.1 undecidable manual P 152 0.4389 111 0.17 93
IV.RUFI.EHZ. 2020-04-04T23:37:51.68 0.1 undecidable manual P 184 0.4551 110 0.19 92
IV.BRIS.HHZ. 2020-04-04T23:37:50.96 0.1 undecidable manual S 114 0.1646 140 -0.35 94
IV.VISG.HHZ. 2020-04-04T23:37:50.47 0.1 undecidable manual S 221 0.1349 146 -0.32 97
IV.BRSN.EHZ. 2020-04-04T23:37:50.54 0.6 undecidable manual P 91 0.3741 115 0.32 46
IV.MTRZ.HHZ. 2020-04-04T23:37:50.47 0.1 undecidable manual S 283 0.0971 155 0.24 97
IV.FIU.EHZ. 2020-04-04T23:37:50.96 0.6 undecidable manual P 352 0.3516 117 1.1 35
IV.RONT.HHZ. 2020-04-04T23:37:49.28 0.1 undecidable manual P 197 0.3112 120 0.02 98
IV.SEI.HHZ. 2020-04-04T23:37:48.78 0.1 undecidable manual P 211 0.277 124 0.02 99
IV.IMOL.EHZ. 2020-04-04T23:37:47.10 0.1 negative manual P 63 0.1493 143 -0.06 100
IV.LMD.HHZ. 2020-04-04T23:37:47.66 0.1 undecidable manual P 153 0.2401 128 -0.59 86
IV.MTRZ.HHZ. 2020-04-04T23:37:46.45 0.1 negative manual P 283 0.0971 155 -0.25 98
IV.BRIS.HHZ. 2020-04-04T23:37:46.95 0.1 undecidable manual P 114 0.1646 140 -0.37 94
IV.VISG.HHZ. 2020-04-04T23:37:46.18 0.1 negative manual P 221 0.1349 146 -0.85 80
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HNN. ML:1.8 0.00030987601 43.6096 AML other m 2020-04-04T23:37:46.16
IV.VISG.HHE. ML:2 0.00058725675 0.1152 AML other m 2020-04-04T23:37:50.73
IV.VISG.HHN. ML:2.1 0.00071710225 0.1408 AML other m 2020-04-04T23:37:50.00
IV.BRIS.HNE. ML:1.7 0.0002460601 1.4848 AML other m 2020-04-04T23:37:50.85
IV.MTRZ.HHN. ML:2.2 0.00083787285 0.192 AML other m 2020-04-04T23:37:51.96
IV.MTRZ.HNN. ML:2.2 0.00081595265 0.2048 AML other m 2020-04-04T23:37:51.96
IV.IMOL.HNN. ML:2.2 0.00090706105 0.192 AML other m 2020-04-04T23:37:52.71
IV.IMOL.HNE. ML:2.4 0.001318575 0.4608 AML other m 2020-04-04T23:37:53.09
IV.BRIS.HHE. ML:1.7 0.0002668009 0.1792 AML other m 2020-04-04T23:37:53.28
IV.MTRZ.HNE. ML:1.9 0.0005073487 0.2688 AML other m 2020-04-04T23:37:53.30
IV.MTRZ.HHE. ML:1.9 0.0004626562 0.2688 AML other m 2020-04-04T23:37:53.30
IV.BRIS.HHN. ML:1.9 0.00040247815 0.256 AML other m 2020-04-04T23:37:53.33
IV.LMD.HHN. ML:2.1 0.00056777525 0.2432 AML other m 2020-04-04T23:37:53.56
IV.LMD.HHE. ML:1.9 0.0003432337 0.2176 AML other m 2020-04-04T23:37:54.36
IV.SEI.HHN. ML:2.7 0.00188022 0.384 AML other m 2020-04-04T23:37:54.52
IV.RONT.HHN. ML:2.2 0.0004854207 0.5504 AML other m 2020-04-04T23:37:55.99
IV.SEI.HHE. ML:2.1 0.0004807091 0.3456 AML other m 2020-04-04T23:37:56.12
IV.RONT.HHE. ML:2.4 0.0007879234 0.32 AML other m 2020-04-04T23:37:59.38
IV.RUFI.EHE. ML:1.1 2.8168325E-5 0.384 AML other m 2020-04-04T23:37:59.88
IV.SFI.EHN. ML:1.7 0.00013186305 0.4992 AML other m 2020-04-04T23:37:59.74
IV.SFI.HNN. ML:1.7 0.000128693425 0.5632 AML other m 2020-04-04T23:37:59.71
IV.SFI.EHE. ML:1.5 7.703554E-5 0.2688 AML other m 2020-04-04T23:38:00.33
IV.BRSN.HNE. ML:1.8 0.00018396405 0.3968 AML other m 2020-04-04T23:38:00.47
IV.BRSN.EHE. ML:1.8 0.0001649693 0.448 AML other m 2020-04-04T23:38:01.19
IV.RUFI.EHN. ML:1.5 7.1010145E-5 0.4224 AML other m 2020-04-04T23:38:02.14
IV.BRSN.HNN. ML:1.8 0.0001769529 0.32 AML other m 2020-04-04T23:38:03.15
IV.BRSN.EHN. ML:1.8 0.00017722635 0.3584 AML other m 2020-04-04T23:38:03.15
IV.FIU.EHE. ML:2 0.000265893 0.5888 AML other m 2020-04-04T23:38:04.04
IV.CRMI.HHE. ML:0 1.715E-5 1.56 AML other m 2020-04-04T23:38:05.14
IV.CRMI.HHN. ML:0 1.505E-5 1.4 AML other m 2020-04-04T23:38:06.08
IV.SFI.HNE. ML:1.6 0.00010665312 0.6912 AML other m 2020-04-04T23:38:09.29
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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