Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 01-04-2020 and time 11:33:40 (UTC) in region 8 km NW Casalfiumanese (BO)

A magnitude ML 1.7 earthquake occured in region: 8 km NW Casalfiumanese (BO), on

  • 01-04-2020 11:33:40 (UTC)
  • 01-04-2020 13:33:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3360, 11.5360 at 25 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
Casalfiumanese BO 8 3438 3438
Borgo Tossignano BO 8 3288 6726
Dozza BO 8 6652 13378
Castel San Pietro Terme BO 8 20811 34189
Fontanelice BO 9 1943 36132
Monterenzio BO 10 6035 42167
Ozzano dell'Emilia BO 13 13596 55763
Castel del Rio BO 14 1246 57009
Casola Valsenio RA 14 2617 59626
Imola BO 14 69797 129423
Castel Guelfo di Bologna BO 16 4455 133878
Pianoro BO 16 17460 151338
Riolo Terme RA 17 5720 157058
Medicina BO 18 16739 173797
San Lazzaro di Savena BO 18 32065 205862
Loiano BO 18 4294 210156
Castenaso BO 20 14925 225081

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Imola (69797 inhabitants)
23 Km SE of Bologna (386663 inhabitants)
28 Km W of Faenza (58541 inhabitants)
42 Km W of Forlì (117913 inhabitants)
54 Km W of Ravenna (159116 inhabitants)
56 Km S of Ferrara (133155 inhabitants)
59 Km SE of Modena (184973 inhabitants)
61 Km W of Cesena (96758 inhabitants)
61 Km NE of Prato (191150 inhabitants)
67 Km NE of Pistoia (90315 inhabitants)
67 Km NE of Firenze (382808 inhabitants)
70 Km NE of Scandicci (50609 inhabitants)
72 Km SE of Carpi (70699 inhabitants)
82 Km E of Reggio nell'Emilia (171345 inhabitants)
84 Km S of Rovigo (51867 inhabitants)
88 Km W of Rimini (147750 inhabitants)
99 Km NE of Lucca (89046 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 1.7 2020-04-01
11:33:40		 44.3358 11.5357 25 2020-07-18
21:08:35		 Bollettino Sismico Italiano INGV 78856071
Reviewed
Rev100 		ML 1.8 2020-04-01
11:33:39		 44.3023 11.5388 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 11:33:40 ± 0.32
Latitude 44.3358 ± 0.0135
Longitude 11.5357 ± 0.0151
Depth (km) 25 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 78856071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1397
Semi-minor axis of confidence ellipse (meter) 958
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 323
Circular confidence region, given by single value of horizontal uncertainty (meter) 1400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 187
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.08274
Epicentral distance of station farthest from the epicenter (degree) 0.56837
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:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 78856071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-05-05 07:59:20

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(km) Takeoff_angle Residual Weight
IV.ASQU.HHE. 2020-04-01T11:34:00.64 0.6 undecidable manual S 161 63.0924 105 0.73 39
IV.RUFI.EHE. 2020-04-01T11:33:58.53 0.6 undecidable manual S 182 55.3002 108 0.63 41
IV.RINC.HHN. 2020-04-01T11:33:57.29 0.6 undecidable manual S 173 50.2164 110 0.68 41
IV.SFI.HNN. 2020-04-01T11:33:57.62 0.6 undecidable manual S 152 53.8017 108 0.08 48
IV.SEI.HHZ. 2020-04-01T11:33:52.47 0.6 undecidable manual S 204 34.2435 120 -0.27 47
IV.LMD.HHZ. 2020-04-01T11:33:51.86 0.6 undecidable manual S 154 31.746 122 -0.3 47
IV.ASQU.HHE. 2020-04-01T11:33:51.64 0.6 undecidable manual P 161 63.0924 105 0.1 46
IV.RUFI.EHE. 2020-04-01T11:33:50.48 0.6 undecidable manual P 182 55.3002 108 0.1 47
IV.BRIS.HHZ. 2020-04-01T11:33:50.11 0.6 undecidable manual S 124 22.0668 133 0 51
IV.IMOL.HNN. 2020-04-01T11:33:49.63 0.6 undecidable manual S 81 16.5723 142 0.5 46
IV.SFI.HNN. 2020-04-01T11:33:49.93 0.6 undecidable manual P 152 53.8017 108 -0.25 47
IV.RINC.HHN. 2020-04-01T11:33:49.51 0.6 undecidable manual P 173 50.2164 110 -0.13 48
IV.MTRZ.HHZ. 2020-04-01T11:33:48.82 0.6 undecidable manual S 254 9.1797 157 0.7 44
IV.VISG.HHZ. 2020-04-01T11:33:48.99 0.6 undecidable manual S 206 18.1707 139 -0.4 47
IV.SEI.HHZ. 2020-04-01T11:33:47.34 0.6 undecidable manual P 204 34.2435 120 -0.06 50
IV.BRSN.HNE. 2020-04-01T11:33:47.93 0.6 undecidable manual P 97 43.623 113 -0.77 41
IV.LMD.HHZ. 2020-04-01T11:33:46.48 0.6 undecidable manual P 154 31.746 122 -0.59 44
IV.IMOL.HNN. 2020-04-01T11:33:45.57 0.6 undecidable manual P 81 16.5723 142 0.25 49
IV.BRIS.HHZ. 2020-04-01T11:33:45.66 0.3 undecidable manual P 124 22.0668 133 -0.23 74
IV.MTRZ.HHZ. 2020-04-01T11:33:44.97 0.1 negative manual P 254 9.1797 157 0.23 100
IV.VISG.HHZ. 2020-04-01T11:33:44.68 0.3 undecidable manual P 206 18.1707 139 -0.79 62
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.6 0.00012883245000000002 1.28 AML other m 2020-04-01T11:33:52.87
IV.VISG.HHN. ML:1.8 0.0002860388 0.1408 AML other m 2020-04-01T11:33:49.50
IV.VISG.HHE. ML:1.6 0.00020507255000000002 0.1408 AML other m 2020-04-01T11:33:49.24
IV.MTRZ.HHE. ML:1.5 0.0001974796 0.256 AML other m 2020-04-01T11:33:51.93
IV.MTRZ.HNN. ML:1.8 0.00034333415 0.2112 AML other m 2020-04-01T11:33:50.45
IV.MTRZ.HHN. ML:1.8 0.00035068265 0.1984 AML other m 2020-04-01T11:33:50.45
IV.BRIS.HNE. ML:1.4 0.0001249663 1.0688 AML other m 2020-04-01T11:33:51.14
IV.BRIS.HHN. ML:1.5 0.00014319915 0.2624 AML other m 2020-04-01T11:33:51.96
IV.LMD.HHN. ML:1.7 0.0001895811 0.2368 AML other m 2020-04-01T11:33:52.07
IV.SEI.HHN. ML:2.3 0.0006884004500000001 0.384 AML other m 2020-04-01T11:33:53.02
IV.SEI.HHE. ML:1.7 0.00017317785000000002 0.32 AML other m 2020-04-01T11:33:54.61
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