Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 24-03-2020 and time 11:20:17 (Italy) in region 7 km SW Castel San Pietro Terme (BO)

A magnitude ML 1.9 earthquake occured in region: 7 km SW Castel San Pietro Terme (BO), on

  • 24-03-2020 10:20:17 (UTC)
  • 24-03-2020 11:20:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3470, 11.5340 at 28 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 San Pietro Terme BO 7 20811 20811
Dozza BO 8 6652 27463
Casalfiumanese BO 9 3438 30901
Borgo Tossignano BO 9 3288 34189
Fontanelice BO 10 1943 36132
Monterenzio BO 10 6035 42167
Ozzano dell'Emilia BO 12 13596 55763
Imola BO 14 69797 125560
Castel del Rio BO 15 1246 126806
Castel Guelfo di Bologna BO 15 4455 131261
Casola Valsenio RA 15 2617 133878
Pianoro BO 16 17460 151338
Medicina BO 17 16739 168077
Riolo Terme RA 17 5720 173797
San Lazzaro di Savena BO 17 32065 205862
Loiano BO 19 4294 210156
Castenaso BO 19 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)
29 Km W of Faenza (58541 inhabitants)
43 Km W of Forlì (117913 inhabitants)
54 Km W of Ravenna (159116 inhabitants)
55 Km S of Ferrara (133155 inhabitants)
59 Km SE of Modena (184973 inhabitants)
61 Km W of Cesena (96758 inhabitants)
62 Km NE of Prato (191150 inhabitants)
67 Km NE of Pistoia (90315 inhabitants)
68 Km NE of Firenze (382808 inhabitants)
71 Km SE of Carpi (70699 inhabitants)
71 Km NE of Scandicci (50609 inhabitants)
82 Km E of Reggio nell'Emilia (171345 inhabitants)
83 Km S of Rovigo (51867 inhabitants)
88 Km W of Rimini (147750 inhabitants)
100 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 1.9 2020-03-24
10:20:17		 44.3467 11.5342 28 2020-07-18
21:08:30		 Bollettino Sismico Italiano INGV 77726511
Reviewed
Rev100 		ML 1.9 2020-03-24
10:20:17		 44.3503 11.5803 26 2020-03-24
10:37:14		 Sala Sismica INGV-Roma 77528811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-24 10:20:17 ± 0.4
Latitude 44.3467 ± 0.0135
Longitude 11.5342 ± 0.0189
Depth (km) 28 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 77726511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1530
Semi-minor axis of confidence ellipse (meter) 1207
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 97
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) 198
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.08544
Epicentral distance of station farthest from the epicenter (degree) 0.57916
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:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 77528811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-24 10:37:14

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 77726511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-01 08:49:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHE. 2020-03-24T10:20:38.15 0.6 undecidable manual S 161 64.2912 108 0.48 43
IV.SFI.HNZ. 2020-03-24T10:20:35.44 1.0 undecidable manual S 153 55.0005 111 0.12 24
IV.RUFI.EHZ. 2020-03-24T10:20:35.78 1.0 undecidable manual S 182 56.499 110 0.09 24
IV.RINC.HHZ. 2020-03-24T10:20:34.67 0.3 undecidable manual S 173 51.4152 112 0.25 70
IV.RONT.HHZ. 2020-03-24T10:20:32.36 1.0 undecidable manual S 192 40.0266 119 0.68 21
IV.SEI.HHZ. 2020-03-24T10:20:30.31 0.3 undecidable manual S 203 35.3424 123 -0.3 73
IV.ASQU.HHE. 2020-03-24T10:20:29.12 0.1 undecidable manual P 161 64.2912 108 0.04 96
IV.LMD.HHZ. 2020-03-24T10:20:29.69 0.6 undecidable manual S 155 32.8449 125 -0.38 47
IV.RUFI.EHZ. 2020-03-24T10:20:28.02 0.1 undecidable manual P 182 56.499 110 0.08 96
IV.BRIS.HHZ. 2020-03-24T10:20:27.22 0.3 undecidable manual S 126 22.8549 136 -0.82 61
IV.RINC.HHZ. 2020-03-24T10:20:27.35 0.1 undecidable manual P 173 51.4152 112 0.14 96
IV.SFI.HNZ. 2020-03-24T10:20:27.79 0.1 undecidable manual P 153 55.0005 111 0.06 97
IV.IMOL.EHZ. 2020-03-24T10:20:27.84 0.6 undecidable manual S 85 16.5723 146 0.86 42
IV.VISG.HHZ. 2020-03-24T10:20:26.60 1.0 undecidable manual S 204 19.1697 142 -0.79 21
IV.MTRZ.HHZ. 2020-03-24T10:20:26.72 0.3 undecidable manual S 247 9.4794 159 0.62 68
IV.RONT.HHZ. 2020-03-24T10:20:25.86 0.6 undecidable manual P 192 40.0266 119 0.23 48
IV.SEI.HHZ. 2020-03-24T10:20:25.13 0.3 undecidable manual P 203 35.3424 123 0.12 74
IV.LMD.HHZ. 2020-03-24T10:20:23.97 0.1 undecidable manual P 155 32.8449 125 -0.73 84
IV.IMOL.EHZ. 2020-03-24T10:20:23.64 0.3 undecidable manual P 85 16.5723 146 0.73 66
IV.BRIS.HHZ. 2020-03-24T10:20:23.18 0.1 undecidable manual P 126 22.8549 136 -0.34 96
IV.VISG.HHZ. 2020-03-24T10:20:22.44 0.1 undecidable manual P 204 19.1697 142 -0.71 87
IV.MTRZ.HHZ. 2020-03-24T10:20:22.71 0.1 undecidable manual P 247 9.4794 159 0.31 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:1.8 0.0002655 0.12 AML other m 2020-03-24T10:20:27.08
IV.VISG.HHN. ML:1.9 0.000378 1.1 AML other m 2020-03-24T10:20:27.16
IV.MTRZ.HHE. ML:1.8 0.0003525 1.82 AML other m 2020-03-24T10:20:28.92
IV.MTRZ.HHN. ML:2.0 0.0005405 0.24 AML other m 2020-03-24T10:20:28.18
IV.LMD.HHE. ML:1.8 0.0001975 0.38 AML other m 2020-03-24T10:20:29.92
IV.LMD.HHN. ML:1.9 0.000244 1.74 AML other m 2020-03-24T10:20:30.88
IV.SEI.HHN. ML:2.4 0.0007615 1.66 AML other m 2020-03-24T10:20:31.83
IV.SEI.HHE. ML:1.9 0.000264 1.54 AML other m 2020-03-24T10:20:33.80
IV.RONT.HHE. ML:2.1 0.000319 0.5 AML other m 2020-03-24T10:20:35.07
IV.RONT.HHN. ML:2.0 0.000244 0.38 AML other m 2020-03-24T10:20:35.52
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