Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 10-03-2021 and time 00:47:36 (Italy) in region 3 km SE Castel del Rio (BO)

A magnitude ML 2.1 earthquake occured in region: 3 km SE Castel del Rio (BO), on

  • 09-03-2021 23:47:36 (UTC)
  • 10-03-2021 00:47:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1980, 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
Castel del Rio BO 3 1246 1246
Fontanelice BO 7 1943 3189
Casola Valsenio RA 8 2617 5806
Palazzuolo sul Senio FI 9 1154 6960
Borgo Tossignano BO 10 3288 10248
Casalfiumanese BO 13 3438 13686
Marradi FI 15 3139 16825
Firenzuola FI 15 4726 21551
Riolo Terme RA 18 5720 27271
Monghidoro BO 18 3749 31020
Monterenzio BO 18 6035 37055
Loiano BO 19 4294 41349
Brisighella RA 19 7639 48988
Dozza BO 20 6652 55640

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Imola (69797 inhabitants)
29 Km W of Faenza (58541 inhabitants)
37 Km SE of Bologna (386663 inhabitants)
40 Km W of Forlì (117913 inhabitants)
50 Km NE of Prato (191150 inhabitants)
53 Km NE of Firenze (382808 inhabitants)
56 Km NE of Scandicci (50609 inhabitants)
57 Km W of Cesena (96758 inhabitants)
57 Km NE of Pistoia (90315 inhabitants)
58 Km W of Ravenna (159116 inhabitants)
70 Km SE of Modena (184973 inhabitants)
71 Km S of Ferrara (133155 inhabitants)
83 Km SE of Carpi (70699 inhabitants)
84 Km W of Rimini (147750 inhabitants)
86 Km NW of Arezzo (99543 inhabitants)
91 Km SE of Reggio nell'Emilia (171345 inhabitants)
91 Km E of Lucca (89046 inhabitants)
99 Km N of Siena (53903 inhabitants)
99 Km S of Rovigo (51867 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 2.1 2021-03-09
23:47:36		 44.1975 11.5358 25 2021-07-12
16:55:02		 Bollettino Sismico Italiano INGV 88256251
Reviewed
Rev100 		ML 2.1 2021-03-09
23:47:35		 44.2098 11.5363 26 2021-03-10
00:00:56		 Sala Sismica INGV-Roma 87956001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-09 23:47:36 ± 0.24
Latitude 44.1975 ± 0.0081
Longitude 11.5358 ± 0.0088
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 88256251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 959
Semi-minor axis of confidence ellipse (meter) 112
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 22
Circular confidence region, given by single value of horizontal uncertainty (meter) 960.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
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) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.07285
Epicentral distance of station farthest from the epicenter (degree) 0.43977
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 88256251
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-08 01:14:12

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 87956001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-10 00:00:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2021-03-09T23:47:52.53 0.6 undecidable manual S 155 48.8178 111 0.3 47
IV.SFI.EHZ. 2021-03-09T23:47:50.74 0.3 undecidable manual S 143 40.8258 115 0.48 70
IV.RUFI.EHZ. 2021-03-09T23:47:49.87 0.6 undecidable manual S 183 39.9267 116 -0.18 50
IV.MOCL.EHZ. 2021-03-09T23:47:49.33 0.6 undecidable manual S 233 35.4423 119 0.35 48
IV.FNVD.HHZ. 2021-03-09T23:47:48.62 0.6 undecidable manual S 264 33.0447 121 0.2 50
IV.RONT.HHZ. 2021-03-09T23:47:47.06 0.3 undecidable manual S 200 24.0537 131 0.57 69
IV.SEI.HHZ. 2021-03-09T23:47:46.25 0.3 undecidable manual S 222 21.2676 135 0.31 74
IV.ASQU.HHZ. 2021-03-09T23:47:45.24 0.3 undecidable manual P 155 48.8178 111 -0.14 74
IV.LMD.HHZ. 2021-03-09T23:47:45.08 0.3 undecidable manual S 134 19.0698 139 -0.46 72
IV.BRIS.HHZ. 2021-03-09T23:47:45.90 0.3 undecidable manual S 81 18.5703 139 0.44 74
IV.SFI.EHZ. 2021-03-09T23:47:44.07 0.6 undecidable manual P 143 40.8258 115 -0.18 50
IV.MOCL.EHZ. 2021-03-09T23:47:43.08 0.6 undecidable manual P 233 35.4423 119 -0.43 48
IV.RUFI.EHZ. 2021-03-09T23:47:43.94 0.1 undecidable manual P 183 39.9267 116 -0.18 100
IV.VISG.HHZ. 2021-03-09T23:47:43.62 0.3 undecidable manual S 263 8.0808 160 -0.42 75
IV.FNVD.HHZ. 2021-03-09T23:47:43.16 0.6 undecidable manual P 264 33.0447 121 -0.02 52
IV.IMOL.HNZ. 2021-03-09T23:47:42.62 0.3 undecidable manual P 42 24.3534 131 0.52 72
IV.RONT.HHZ. 2021-03-09T23:47:42.08 0.6 undecidable manual P 200 24.0537 131 0.01 53
IV.MTRZ.HHZ. 2021-03-09T23:47:41.54 0.3 undecidable manual P 325 15.5733 145 0.36 75
IV.BRIS.HHZ. 2021-03-09T23:47:41.42 0.3 undecidable manual P 81 18.5703 139 -0.05 79
IV.SEI.HHZ. 2021-03-09T23:47:41.59 0.6 undecidable manual P 222 21.2676 135 -0.16 52
IV.LMD.HHZ. 2021-03-09T23:47:40.93 0.3 undecidable manual P 134 19.0698 139 -0.59 69
IV.VISG.HHZ. 2021-03-09T23:47:40.12 0.1 undecidable manual P 263 8.0808 160 -0.53 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:2.2 0.0009709091999999999 0.2304 AML other m 2021-03-09T23:47:43.85
IV.VISG.HHN. ML:2.1 0.0007316105500000001 1.616 AML other m 2021-03-09T23:47:44.12
IV.LMD.HHE. ML:2.0 0.0004709983 0.2432 AML other m 2021-03-09T23:47:45.24
IV.BRIS.HHN. ML:2.4 0.0013638865 0.3456 AML other m 2021-03-09T23:47:46.19
IV.BRIS.HHE. ML:2.3 0.0008993229999999999 1.6032 AML other m 2021-03-09T23:47:46.16
IV.SEI.HHE. ML:2.4 0.0012518745 0.5504 AML other m 2021-03-09T23:47:46.75
IV.SEI.HHN. ML:2.8 0.0029420329999999997 0.2688 AML other m 2021-03-09T23:47:46.52
IV.LMD.HHN. ML:1.9 0.00034778500000000003 0.32 AML other m 2021-03-09T23:47:47.10
IV.RONT.HHN. ML:2.3 0.00093046805 0.3968 AML other m 2021-03-09T23:47:47.37
IV.MTRZ.HNE. ML:2.1 0.0007423365 0.3328 AML other m 2021-03-09T23:47:48.46
IV.MTRZ.HHE. ML:2.2 0.0007851886999999999 0.3328 AML other m 2021-03-09T23:47:48.29
IV.RONT.HHE. ML:2.6 0.0017334874999999999 0.3072 AML other m 2021-03-09T23:47:48.50
IV.MTRZ.HNN. ML:2.0 0.0005003969 0.9856 AML other m 2021-03-09T23:47:49.73
IV.MTRZ.HHN. ML:2.0 0.00047986885 0.2176 AML other m 2021-03-09T23:47:49.24
IV.SFI.EHE. ML:1.6 0.00012090000000000001 0.76 AML other m 2021-03-09T23:47:50.99
IV.SFI.HNN. ML:2.1 0.0003307892 0.96 AML other m 2021-03-09T23:47:51.01
IV.SFI.EHN. ML:2.0 0.0002915 1.4 AML other m 2021-03-09T23:47:51.02
IV.SFI.HNE. ML:1.8 0.00019410889999999997 1.088 AML other m 2021-03-09T23:47:51.76
IV.RUFI.EHN. ML:1.5 0.00009401930999999999 1.3984 AML other m 2021-03-09T23:47:51.28
IV.RUFI.EHE. ML:1.5 0.000093492275 1.6512 AML other m 2021-03-09T23:47:55.87
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
Waveforms Seismic signals in miniseed + resp format Download