Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 28-04-2020 and time 09:27:07 (Italy) in region 7 km SW Castel del Rio (BO)

A magnitude ML 1.3 earthquake occured in region: 7 km SW Castel del Rio (BO), on

  • 28-04-2020 07:27:07 (UTC)
  • 28-04-2020 09:27:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1770, 11.4370 at 7 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
Castel del Rio BO 7 1246 1246
Firenzuola FI 8 4726 5972
Monghidoro BO 11 3749 9721
Palazzuolo sul Senio FI 11 1154 10875
Fontanelice BO 13 1943 12818
Loiano BO 14 4294 17112
Casola Valsenio RA 16 2617 19729
Borgo Tossignano BO 17 3288 23017
Monterenzio BO 17 6035 29052
San Benedetto Val di Sambro BO 17 4315 33367
Monzuno BO 17 6328 39695
Marradi FI 18 3139 42834
Casalfiumanese BO 20 3438 46272

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Imola (69797 inhabitants)
36 Km S of Bologna (386663 inhabitants)
38 Km W of Faenza (58541 inhabitants)
43 Km NE of Prato (191150 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
49 Km W of Forlì (117913 inhabitants)
49 Km NE of Pistoia (90315 inhabitants)
51 Km NE of Scandicci (50609 inhabitants)
65 Km W of Cesena (96758 inhabitants)
66 Km SE of Modena (184973 inhabitants)
66 Km W of Ravenna (159116 inhabitants)
75 Km S of Ferrara (133155 inhabitants)
80 Km SE of Carpi (70699 inhabitants)
83 Km E of Lucca (89046 inhabitants)
86 Km SE of Reggio nell'Emilia (171345 inhabitants)
87 Km NW of Arezzo (99543 inhabitants)
91 Km W of Rimini (147750 inhabitants)
96 Km N of Siena (53903 inhabitants)
97 Km NE of Pisa (89158 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 1.3 2020-04-28
07:27:07		 44.1768 11.4368 7 2020-07-18
21:08:39		 Bollettino Sismico Italiano INGV 79925871
Reviewed
Rev100 		ML 1.3 2020-04-28
07:27:07		 44.1757 11.4328 7 2020-04-28
07:33:47		 Sala Sismica INGV-Roma 78640551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-28 07:27:07 ± 0.16
Latitude 44.1768 ± 0.0054
Longitude 11.4368 ± 0.0075
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79925871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 650
Semi-minor axis of confidence ellipse (meter) 156
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 260
Circular confidence region, given by single value of horizontal uncertainty (meter) 650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.01259
Epicentral distance of station farthest from the epicenter (degree) 0.37232
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:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 79925871
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-05 11:11:55

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 78640551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-28 07:33:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RINC.HHN. 2020-04-28T07:27:19.92 0.6 undecidable manual S 157 34.9428 101 -0.44 44
IV.LMD.HHZ. 2020-04-28T07:27:16.67 0.3 undecidable manual S 117 24.1536 106 -0.06 73
IV.MPPT.EHN. 2020-04-28T07:27:16.01 0.6 undecidable manual P 229 36.8298 101 0.51 43
IV.FNVD.HHZ. 2020-04-28T07:27:16.70 0.3 undecidable manual S 268 24.9528 106 -0.3 70
IV.ZCCA.HNN. 2020-04-28T07:27:16.44 1.0 undecidable manual P 298 41.3253 50 0.15 23
IV.RINC.HHN. 2020-04-28T07:27:15.39 0.6 undecidable manual P 157 34.9428 101 0.26 46
IV.RONT.HHZ. 2020-04-28T07:27:15.86 0.6 undecidable manual S 181 20.3685 109 0.4 46
IV.SEI.HHZ. 2020-04-28T07:27:14.24 0.1 undecidable manual S 205 14.9739 115 0.51 90
IV.MTRZ.HHZ. 2020-04-28T07:27:14.73 0.3 undecidable manual S 356 15.0738 115 0.96 56
IV.IMOL.HNZ. 2020-04-28T07:27:14.16 1.0 undecidable manual P 50 31.6461 103 -0.32 23
IV.BRIS.HHZ. 2020-04-28T07:27:13.68 0.3 undecidable manual P 79 26.751 105 0.15 72
IV.RONT.HHZ. 2020-04-28T07:27:12.22 0.3 positive manual P 181 20.3685 109 -0.08 74
IV.LMD.HHZ. 2020-04-28T07:27:12.68 0.6 undecidable manual P 117 24.1536 106 -0.36 46
IV.FNVD.HHZ. 2020-04-28T07:27:12.71 0.1 undecidable manual P 268 24.9528 106 -0.48 90
IV.SEI.HHZ. 2020-04-28T07:27:11.25 0.1 positive manual P 205 14.9739 115 -0.05 100
IV.MTRZ.HHZ. 2020-04-28T07:27:11.25 0.1 undecidable manual P 356 15.0738 115 -0.07 99
IV.VISG.HHZ. 2020-04-28T07:27:10.32 0.1 undecidable manual S 352 1.3986 169 -0.15 100
IV.VISG.HHZ. 2020-04-28T07:27:09.20 0.1 undecidable manual P 352 1.3986 169 -0.22 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHE. ML:1.3 0.00022847375000000002 0.1376 AML other m 2020-04-28T07:27:14.42
IV.MTRZ.HHN. ML:1.4 0.0002819473 1.6416 AML other m 2020-04-28T07:27:15.11
IV.MTRZ.HNN. ML:1.4 0.0002576904 0.2816 AML other m 2020-04-28T07:27:15.12
IV.MTRZ.HHE. ML:1.6 0.00046409900000000004 0.1792 AML other m 2020-04-28T07:27:15.22
IV.MTRZ.HNE. ML:1.6 0.00044341395000000003 0.1888 AML other m 2020-04-28T07:27:15.14
IV.SEI.HHN. ML:1.5 0.00034233670000000007 1.6 AML other m 2020-04-28T07:27:16.20
IV.RONT.HHN. ML:1.3 0.00015273349999999998 0.2208 AML other m 2020-04-28T07:27:16.48
IV.LMD.HHN. ML:0.7 0.000034468275 0.1408 AML other m 2020-04-28T07:27:17.44
IV.LMD.HHE. ML:0.6 0.00002639926 0.0992 AML other m 2020-04-28T07:27:18.24
IV.RONT.HHE. ML:1.4 0.00019348055 0.2016 AML other m 2020-04-28T07:27:18.20
IV.BRIS.HHN. ML:1.0 0.000054395655 0.1824 AML other m 2020-04-28T07:27:18.40
IV.BRIS.HHE. ML:1.0 0.00005828862 0.32 AML other m 2020-04-28T07:27:22.24
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