Earthquake with magnitude of ML 1.8 on date 01-04-2020 and time 13:33:39 (Italy) in region 5 km NW Borgo Tossignano (BO)

A magnitude ML 1.8 earthquake occured in region: 5 km NW Borgo Tossignano (BO), on

  • 01-04-2020 11:33:39 (UTC)
  • 01-04-2020 13:33:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3, 11.54 at 28 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 5 3288 3288
Fontanelice BO 5 1943 5231
Casalfiumanese BO 6 3438 8669
Dozza BO 10 6652 15321
Castel del Rio BO 10 1246 16567
Monterenzio BO 11 6035 22602
Casola Valsenio RA 11 2617 25219
Castel San Pietro Terme BO 12 20811 46030
Riolo Terme RA 15 5720 51750
Imola BO 15 69797 121547
Ozzano dell'Emilia BO 17 13596 135143
Loiano BO 18 4294 139437
Pianoro BO 18 17460 156897
Castel Guelfo di Bologna BO 18 4455 161352
Monghidoro BO 20 3749 165101

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km W of Imola (69797 inhabitants)
27 Km SE of Bologna (386663 inhabitants)
28 Km W of Faenza (58541 inhabitants)
41 Km W of Forlì (117913 inhabitants)
54 Km W of Ravenna (159116 inhabitants)
59 Km NE of Prato (191150 inhabitants)
59 Km W of Cesena (96758 inhabitants)
60 Km S of Ferrara (133155 inhabitants)
62 Km SE of Modena (184973 inhabitants)
63 Km NE of Firenze (382808 inhabitants)
64 Km NE of Pistoia (90315 inhabitants)
67 Km NE of Scandicci (50609 inhabitants)
74 Km SE of Carpi (70699 inhabitants)
84 Km SE of Reggio nell'Emilia (171345 inhabitants)
86 Km W of Rimini (147750 inhabitants)
88 Km S of Rovigo (51867 inhabitants)
97 Km N of Arezzo (99543 inhabitants)
97 Km NE of Lucca (89046 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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
Rev 100 ML 1.8 2020-04-01
11:33:39
44.3 11.54 29 2020-04-01
11:45:01
Sala Sismica INGV-Roma 77758101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-01 11:33:39 ± 0.39
Latitude 44.30 ± 0.02
Longitude 11.54 ± 0.02
Depth (km) 29 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77758101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1701
Semi-minor axis of confidence ellipse (meter) 532
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 4
Circular confidence region, given by single value of horizontal uncertainty (meter) 1700
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 152
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.08184
Epicentral distance of station farthest from the epicenter (degree) 0.27969
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 77758101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-01 11:45:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SEI.HHZ. 2020-04-01T11:33:52.47 0.6 undecidable manual S 208 0.2797 128 0.32 46
IV.LMD.HHZ. 2020-04-01T11:33:51.76 0.6 undecidable manual S 152 0.2554 130 0.18 47
IV.BRIS.HHZ. 2020-04-01T11:33:50.11 0.6 undecidable manual S 115 0.1808 141 0.07 49
IV.IMOL.HNN. 2020-04-01T11:33:49.18 1.0 undecidable manual S 69 0.1565 145 -0.43 23
IV.VISG.HHZ. 2020-04-01T11:33:48.83 0.6 undecidable manual S 213 0.1358 149 -0.45 46
IV.MTRZ.HHZ. 2020-04-01T11:33:48.82 0.6 undecidable manual S 277 0.0818 160 0.22 49
IV.SEI.HHZ. 2020-04-01T11:33:47.34 0.3 undecidable manual P 208 0.2797 128 0.45 68
IV.LMD.HHZ. 2020-04-01T11:33:46.39 0.3 undecidable manual P 152 0.2554 130 -0.18 72
IV.IMOL.HNN. 2020-04-01T11:33:45.57 0.3 undecidable manual P 69 0.1565 145 0.14 73
IV.BRIS.HHZ. 2020-04-01T11:33:45.69 0.1 undecidable manual P 115 0.1808 141 0.02 99
IV.MTRZ.HHZ. 2020-04-01T11:33:44.97 0.1 negative manual P 277 0.0818 160 0.12 100
IV.VISG.HHZ. 2020-04-01T11:33:44.68 0.1 undecidable manual P 213 0.1358 149 -0.56 89
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.6 0.0001395 0.56 AML other m 2020-04-01T11:33:53.87
IV.VISG.HHE. ML:1.7 0.000254 1 AML other m 2020-04-01T11:33:50.03
IV.MTRZ.HHN. ML:1.9 0.000405 1.08 AML other m 2020-04-01T11:33:50.45
IV.MTRZ.HHE. ML:1.6 0.000226 1.22 AML other m 2020-04-01T11:33:51.93
IV.LMD.HHN. ML:1.7 0.0001895 0.24 AML other m 2020-04-01T11:33:52.07
IV.SEI.HHN. ML:2.3 0.0006885 0.38 AML other m 2020-04-01T11:33:53.03
IV.SEI.HHE. ML:1.8 0.0001895 0.96 AML other m 2020-04-01T11:33:54.62
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download