Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 21-03-2020 and time 13:37:31 (Italy) in region 3 km NW Borgo Tossignano (BO)

A magnitude ML 1.8 earthquake occured in region: 3 km NW Borgo Tossignano (BO), on

  • 21-03-2020 12:37:31 (UTC)
  • 21-03-2020 13:37:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3010, 11.5730 at 23 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
Borgo Tossignano BO 3 3288 3288
Casalfiumanese BO 4 3438 6726
Fontanelice BO 5 1943 8669
Dozza BO 8 6652 15321
Casola Valsenio RA 9 2617 17938
Castel San Pietro Terme BO 11 20811 38749
Castel del Rio BO 11 1246 39995
Riolo Terme RA 12 5720 45715
Imola BO 13 69797 115512
Monterenzio BO 14 6035 121547
Castel Guelfo di Bologna BO 17 4455 126002
Ozzano dell'Emilia BO 18 13596 139598
Brisighella RA 18 7639 147237
Castel Bolognese RA 18 9554 156791

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km W of Imola (69797 inhabitants)
25 Km W of Faenza (58541 inhabitants)
28 Km SE of Bologna (386663 inhabitants)
38 Km W of Forlì (117913 inhabitants)
52 Km W of Ravenna (159116 inhabitants)
56 Km W of Cesena (96758 inhabitants)
60 Km S of Ferrara (133155 inhabitants)
60 Km NE of Prato (191150 inhabitants)
64 Km SE of Modena (184973 inhabitants)
64 Km NE of Firenze (382808 inhabitants)
66 Km NE of Pistoia (90315 inhabitants)
68 Km NE of Scandicci (50609 inhabitants)
76 Km SE of Carpi (70699 inhabitants)
84 Km W of Rimini (147750 inhabitants)
87 Km SE of Reggio nell'Emilia (171345 inhabitants)
87 Km S of Rovigo (51867 inhabitants)
96 Km N of Arezzo (99543 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 1.8 2020-03-21
12:37:31		 44.301 11.5733 23 2020-07-18
21:08:29		 Bollettino Sismico Italiano INGV 77701741
Reviewed
Rev100 		ML 1.9 2020-03-21
12:37:31		 44.3132 11.5577 24 2020-03-21
13:16:03		 Sala Sismica INGV-Roma 77437471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-21 12:37:31 ± 0.21
Latitude 44.3010 ± 0.0090
Longitude 11.5733 ± 0.0101
Depth (km) 23 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 77701741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 856
Semi-minor axis of confidence ellipse (meter) 625
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.80849
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 31
Type of magnitude ML
Reference to an origin 77701741
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-30 14:33:59

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 27
Type of magnitude ML
Reference to an origin 77437471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-21 13:16:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SFI.EHZ. 2020-03-21T12:37:48.60 0.6 undecidable manual S 154 49.0176 107 0.85 40
IV.PARC.HHZ. 2020-03-21T12:37:47.41 0.6 undecidable manual P 143 89.7435 98 0.3 45
IV.RINC.HHZ. 2020-03-21T12:37:47.70 0.6 undecidable manual S 177 46.0206 108 0.71 42
IV.CRE.HHZ. 2020-03-21T12:37:46.17 0.3 undecidable manual P 158 81.4518 99 0.32 67
IV.RONT.HHZ. 2020-03-21T12:37:45.10 0.6 undecidable manual S 198 35.8419 115 0.64 43
IV.FNVD.HHZ. 2020-03-21T12:37:45.60 0.3 undecidable manual S 248 38.7279 113 0.45 70
IV.FERS.HNN. 2020-03-21T12:37:43.76 0.6 undecidable manual P 358 66.8775 102 0.12 49
IV.SEI.HHZ. 2020-03-21T12:37:43.50 0.6 undecidable manual S 212 32.2455 118 -0.09 53
IV.LMD.HHZ. 2020-03-21T12:37:42.50 0.6 undecidable manual S 157 26.9508 123 0.13 52
IV.ASQU.HHZ. 2020-03-21T12:37:42.30 0.3 undecidable manual P 163 58.497 104 -0.09 74
IV.ZCCA.HHZ. 2020-03-21T12:37:41.56 0.6 undecidable manual P 277 47.7189 108 0.78 41
IV.SFI.EHZ. 2020-03-21T12:37:40.80 0.3 undecidable manual P 154 49.0176 107 -0.18 74
IV.BRIS.HHZ. 2020-03-21T12:37:40.30 0.3 undecidable manual S 119 17.5713 137 -0.13 78
IV.RINC.HHZ. 2020-03-21T12:37:40.56 0.3 undecidable manual P 177 46.0206 108 0.02 77
IV.IMOL.EHZ. 2020-03-21T12:37:40.90 0.6 undecidable manual S 64 14.874 142 0.92 43
IV.MTRZ.HHZ. 2020-03-21T12:37:39.90 0.3 undecidable manual S 276 11.877 149 0.39 76
IV.FNVD.HHZ. 2020-03-21T12:37:39.33 0.3 undecidable manual P 248 38.7279 113 -0.15 76
IV.VISG.HHZ. 2020-03-21T12:37:39.80 0.3 undecidable manual S 222 16.6722 139 -0.47 74
IV.RONT.HHZ. 2020-03-21T12:37:38.82 0.1 undecidable manual P 198 35.8419 115 -0.26 100
IV.SEI.HHZ. 2020-03-21T12:37:38.27 0.3 undecidable manual P 212 32.2455 118 -0.31 75
IV.LMD.HHZ. 2020-03-21T12:37:37.23 0.3 undecidable manual P 157 26.9508 123 -0.64 68
IV.BRIS.HHZ. 2020-03-21T12:37:36.49 0.3 undecidable manual P 119 17.5713 137 -0.27 76
IV.IMOL.EHZ. 2020-03-21T12:37:36.56 0.3 undecidable manual P 64 14.874 142 0.07 81
IV.MTRZ.HHZ. 2020-03-21T12:37:35.96 0.3 undecidable manual P 276 11.877 149 -0.26 77
IV.VISG.HHZ. 2020-03-21T12:37:35.69 0.3 undecidable manual P 222 16.6722 139 -0.97 61
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHE. ML:0.0 0.0002907631 0.3648 AML other m 2020-03-21T12:37:40.60
IV.VISG.HHN. ML:0.0 0.0005542997000000001 0.1216 AML other m 2020-03-21T12:37:40.90
IV.VISG.HHE. ML:0.0 0.00046089505 0.1792 AML other m 2020-03-21T12:37:40.28
IV.MTRZ.HHE. ML:0.0 0.0006338752000000001 0.1792 AML other m 2020-03-21T12:37:41.21
IV.MTRZ.HNE. ML:0.0 0.00062614915 0.2112 AML other m 2020-03-21T12:37:41.21
IV.MTRZ.HNN. ML:0.0 0.0009658012499999999 0.2176 AML other m 2020-03-21T12:37:41.47
IV.MTRZ.HHN. ML:0.0 0.0010431748 0.2176 AML other m 2020-03-21T12:37:41.47
IV.IMOL.HNN. ML:0.0 0.00058490905 0.2048 AML other m 2020-03-21T12:37:42.20
IV.LMD.HHE. ML:0.0 0.00032980620000000005 1.5392 AML other m 2020-03-21T12:37:42.15
IV.BRIS.HHN. ML:0.0 0.00028779319999999996 0.2432 AML other m 2020-03-21T12:37:42.89
IV.LMD.HHN. ML:0.0 0.0004969130000000001 0.2368 AML other m 2020-03-21T12:37:43.12
IV.SEI.HHN. ML:0.0 0.0015136205 0.3776 AML other m 2020-03-21T12:37:44.07
IV.FNVD.HHE. ML:0.0 0.0001244128 0.4032 AML other m 2020-03-21T12:37:45.72
IV.RONT.HHN. ML:0.0 0.00048724729999999995 0.2816 AML other m 2020-03-21T12:37:45.54
IV.FNVD.HHN. ML:0.0 0.0001936833 0.1216 AML other m 2020-03-21T12:37:46.15
IV.SEI.HHE. ML:0.0 0.00036541380000000004 0.3392 AML other m 2020-03-21T12:37:46.06
IV.SFI.EHE. ML:0.0 0.00007564631499999999 0.416 AML other m 2020-03-21T12:37:48.79
IV.RONT.HHE. ML:0.0 0.00070505785 0.2816 AML other m 2020-03-21T12:37:48.92
IV.RINC.HHE. ML:0.0 0.00015741925 0.32 AML other m 2020-03-21T12:37:49.46
IV.SFI.EHN. ML:0.0 0.00014167099999999998 0.48 AML other m 2020-03-21T12:37:49.29
IV.RINC.HHN. ML:0.0 0.00011756417 0.4864 AML other m 2020-03-21T12:37:51.69
IV.ASQU.HHE. ML:0.0 0.00007343515 0.5568 AML other m 2020-03-21T12:37:51.49
IV.ASQU.HHN. ML:0.0 0.000098970505 0.3968 AML other m 2020-03-21T12:37:52.41
IV.CRE.HHN. ML:0.0 0.000038738615 0.256 AML other m 2020-03-21T12:38:00.49
IV.CRE.HHE. ML:0.0 0.00002926909 0.4224 AML other m 2020-03-21T12:38:01.64
IV.PARC.HHN. ML:0.0 0.000018826074999999997 0.64 AML other m 2020-03-21T12:38:03.98
IV.PARC.HHE. ML:0.0 0.00001725879 0.4992 AML other m 2020-03-21T12:38:08.28
IV.BRIS.HNN. ML:1.5 0.0001770981 0.8768 AML other m 2020-03-21T12:37:44.59
IV.IMOL.HNE. ML:1.7 0.00032253125 0.288 AML other m 2020-03-21T12:37:42.54
IV.SFI.HNN. ML:1.8 0.00014242434000000001 0.4416 AML other m 2020-03-21T12:37:49.52
IV.SFI.HNE. ML:1.6 0.00009083129500000001 0.256 AML other m 2020-03-21T12:37:50.79
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