Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 01-04-2020 and time 07:44:23 (UTC) in region 5 km NW Casalfiumanese (BO)

A magnitude ML 1.5 earthquake occured in region: 5 km NW Casalfiumanese (BO), on

  • 01-04-2020 07:44:23 (UTC)
  • 01-04-2020 09:44:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3340, 11.5720 at 24 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 5 3438 3438
Dozza BO 6 6652 10090
Borgo Tossignano BO 6 3288 13378
Castel San Pietro Terme BO 7 20811 34189
Fontanelice BO 8 1943 36132
Imola BO 12 69797 105929
Casola Valsenio RA 13 2617 108546
Monterenzio BO 13 6035 114581
Riolo Terme RA 14 5720 120301
Castel Guelfo di Bologna BO 14 4455 124756
Castel del Rio BO 14 1246 126002
Ozzano dell'Emilia BO 15 13596 139598
Medicina BO 17 16739 156337
Castel Bolognese RA 18 9554 165891
Pianoro BO 19 17460 183351

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km W of Imola (69797 inhabitants)
25 Km W of Faenza (58541 inhabitants)
26 Km SE of Bologna (386663 inhabitants)
39 Km W of Forlì (117913 inhabitants)
51 Km W of Ravenna (159116 inhabitants)
56 Km S of Ferrara (133155 inhabitants)
58 Km W of Cesena (96758 inhabitants)
62 Km SE of Modena (184973 inhabitants)
63 Km NE of Prato (191150 inhabitants)
68 Km NE of Firenze (382808 inhabitants)
69 Km NE of Pistoia (90315 inhabitants)
71 Km NE of Scandicci (50609 inhabitants)
74 Km SE of Carpi (70699 inhabitants)
84 Km S of Rovigo (51867 inhabitants)
85 Km E of Reggio nell'Emilia (171345 inhabitants)
85 Km W of Rimini (147750 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 1.5 2020-04-01
07:44:23		 44.3335 11.5718 25 2020-07-18
21:08:34		 Bollettino Sismico Italiano INGV 78641991
Reviewed
Rev100 		ML 1.5 2020-04-01
07:44:23		 44.3087 11.5265 25 2020-04-01
07:53:16		 Sala Sismica INGV-Roma 77751561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-01 07:44:23 ± 0.36
Latitude 44.3335 ± 0.0171
Longitude 11.5718 ± 0.0201
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 78641991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1528
Semi-minor axis of confidence ellipse (meter) 1419
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 39
Circular confidence region, given by single value of horizontal uncertainty (meter) 1530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 229
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.50992
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 77751561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-01 07:53:16

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 78641991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-05-23 15:39:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RUFI.EHE. 2020-04-01T07:44:41.26 0.6 undecidable manual S 185 55.2003 107 -0.02 62
IV.SFI.EHE. 2020-04-01T07:44:40.91 0.6 undecidable manual S 155 52.3032 108 0.35 59
IV.RINC.HHN. 2020-04-01T07:44:40.09 0.6 undecidable manual S 177 49.7169 109 0.21 60
IV.SEI.HHZ. 2020-04-01T07:44:36.12 0.6 undecidable manual S 209 35.3424 118 -0.25 62
IV.LMD.HHZ. 2020-04-01T07:44:35.17 0.6 undecidable manual S 159 30.3474 123 -0.05 65
IV.RUFI.EHE. 2020-04-01T07:44:34.08 0.6 undecidable manual P 185 55.2003 107 0.29 59
IV.MPPT.EHN. 2020-04-01T07:44:34.68 0.6 undecidable manual P 223 56.5989 107 0.68 52
IV.SFI.EHE. 2020-04-01T07:44:33.45 0.6 undecidable manual P 155 52.3032 108 0.08 62
IV.BRIS.HHZ. 2020-04-01T07:44:33.12 0.6 undecidable manual S 128 19.6692 136 0.12 65
IV.RINC.HHN. 2020-04-01T07:44:32.91 0.6 undecidable manual P 177 49.7169 109 -0.07 62
IV.VISG.HHZ. 2020-04-01T07:44:32.25 0.6 undecidable manual S 214 19.3695 137 -0.71 56
IV.MTRZ.HHZ. 2020-04-01T07:44:32.84 0.6 undecidable manual S 259 11.877 151 1.07 46
IV.LMD.HHZ. 2020-04-01T07:44:30.29 0.6 undecidable manual P 159 30.3474 123 0 65
IV.SEI.HHZ. 2020-04-01T07:44:30.75 0.3 undecidable manual P 209 35.3424 118 -0.2 94
IV.MTRZ.HHZ. 2020-04-01T07:44:28.34 0.3 undecidable manual P 259 11.877 151 0.04 100
IV.BRIS.HHZ. 2020-04-01T07:44:28.99 0.3 undecidable manual P 128 19.6692 136 -0.01 100
IV.VISG.HHZ. 2020-04-01T07:44:28.07 0.3 undecidable manual P 214 19.3695 137 -0.91 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:1.4 0.00013378014999999998 0.16 AML other m 2020-04-01T07:44:32.59
IV.VISG.HHN. ML:1.6 0.0001783592 0.1216 AML other m 2020-04-01T07:44:32.92
IV.MTRZ.HNN. ML:1.7 0.0002725458 0.2112 AML other m 2020-04-01T07:44:33.96
IV.MTRZ.HHN. ML:1.7 0.0002865897 0.2176 AML other m 2020-04-01T07:44:33.86
IV.BRIS.HNN. ML:1.7 0.00025005135 0.3968 AML other m 2020-04-01T07:44:35.11
IV.BRIS.HHN. ML:1.4 0.000108102 0.2816 AML other m 2020-04-01T07:44:35.24
IV.MTRZ.HHE. ML:1.4 0.00013785500000000001 0.3008 AML other m 2020-04-01T07:44:35.34
IV.MTRZ.HNE. ML:1.6 0.000218156105 0.4608 AML other m 2020-04-01T07:44:35.34
IV.BRIS.HNE. ML:1.4 0.00011056659999999999 0.4288 AML other m 2020-04-01T07:44:36.60
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