Earthquake with magnitude of ML 1.1 on date 31-01-2024 and time 18:32:21 (UTC) in region 8 km W Castel del Rio (BO)

A magnitude ML 1.1 earthquake occured in region: 8 km W Castel del Rio (BO), on

  • 31-01-2024 18:32:21 (UTC)
  • 31-01-2024 19:32:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1870, 11.4180 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

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 8 1246 1246
Firenzuola FI 8 4726 5972
Monghidoro BO 9 3749 9721
Loiano BO 12 4294 14015
Palazzuolo sul Senio FI 13 1154 15169
Fontanelice BO 14 1943 17112
San Benedetto Val di Sambro BO 15 4315 21427
Monzuno BO 15 6328 27755
Monterenzio BO 16 6035 33790
Casola Valsenio RA 17 2617 36407
Borgo Tossignano BO 17 3288 39695
Marradi FI 20 3139 42834

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Imola (69797 inhabitants)
35 Km S of Bologna (386663 inhabitants)
39 Km W of Faenza (58541 inhabitants)
43 Km NE of Prato (191150 inhabitants)
48 Km N of Firenze (382808 inhabitants)
49 Km NE of Pistoia (90315 inhabitants)
50 Km W of Forlì (117913 inhabitants)
51 Km NE of Scandicci (50609 inhabitants)
64 Km SE of Modena (184973 inhabitants)
66 Km W of Cesena (96758 inhabitants)
67 Km W of Ravenna (159116 inhabitants)
74 Km S of Ferrara (133155 inhabitants)
79 Km SE of Carpi (70699 inhabitants)
83 Km E of Lucca (89046 inhabitants)
85 Km SE of Reggio nell'Emilia (171345 inhabitants)
88 Km NW of Arezzo (99543 inhabitants)
93 Km W of Rimini (147750 inhabitants)
97 Km NE of Pisa (89158 inhabitants)
97 Km N of Siena (53903 inhabitants)
100 Km E of Viareggio (62467 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
Reviewed
Rev100
ML 1.1 2024-01-31
18:32:21
44.1867 11.4178 11 2024-01-31
18:44:28
Sala Sismica INGV-Roma 124968561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-01-31 18:32:21 ± 0.07
Latitude 44.1867 ± 0.0045
Longitude 11.4178 ± 0.0075
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 124968561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 654
Semi-minor axis of confidence ellipse (meter) 440
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 303
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) 139
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.24911
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 124968561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-01-31 18:44:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ERC.EHZ. 2024-01-31T18:34:08.80 3.0 undecidable manual Pg 22.4 0
IV.PIGN.HHZ. 2024-01-31T18:34:00.80 3.0 undecidable manual Sg 10.45 0
IV.MTTG.HHZ. 2024-01-31T18:33:58.08 3.0 positive manual Pn 3.19 0
IV.LRP.EHZ. 2024-01-31T18:33:40.93 3.0 undecidable manual Sg 5.1 0
IV.MRLC.HHZ. 2024-01-31T18:33:35.74 3.0 negative manual Pg 15.18 0
IV.VULT.HHZ. 2024-01-31T18:33:32.87 3.0 negative manual Pg 13.72 0
GU.BURY.HHZ. 2024-01-31T18:33:11.42 3.0 undecidable manual Pg 7.25 0
MN.TRI.HHZ. 2024-01-31T18:33:10.57 3.0 undecidable manual Sg 0.48 0
IV.MML1.EHZ. 2024-01-31T18:32:58.29 3.0 undecidable manual Sn -0.53 0
IV.ASSB.HHZ. 2024-01-31T18:32:57.77 3.0 undecidable manual S -0.14 0
IV.MOCL.EHZ. 2024-01-31T18:32:31.37 0.6 undecidable manual S 223 27.6501 90 -0.01 49
IV.LMD.HHZ. 2024-01-31T18:32:30.89 0.3 undecidable manual S 118 26.0517 90 -0.06 72
IV.SEI.HHZ. 2024-01-31T18:32:28.44 0.6 undecidable manual S 198 15.4734 91 0.32 46
IV.MOCL.EHZ. 2024-01-31T18:32:27.12 0.1 positive manual P 223 27.6501 90 -0.1 97
IV.LMD.HHZ. 2024-01-31T18:32:27.09 0.1 undecidable manual P 118 26.0517 90 0.12 98
IV.MTRZ.HHE. 2024-01-31T18:32:27.95 0.3 undecidable manual S 2 13.9749 94 0.21 73
IV.SEI.HHZ. 2024-01-31T18:32:25.36 0.1 positive manual P 198 15.4734 91 0.02 99
IV.MTRZ.HHE. 2024-01-31T18:32:25.08 0.1 undecidable manual P 2 13.9749 94 -0.05 100
IV.VISG.HHZ. 2024-01-31T18:32:25.26 0.6 undecidable manual S 79 1.2987 171 -0.17 51
IV.VISG.HHZ. 2024-01-31T18:32:23.23 1.0 undecidable manual P 79 1.2987 171 -0.56 23
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:0.7 0.00009175 0.5 AML other m 2024-01-31T18:32:24.51
IV.VISG.HHN. ML:0.8 0.00011499999999999999 1.14 AML other m 2024-01-31T18:32:25.00
IV.SEI.HHE. ML:1.4 0.00019800000000000002 0.58 AML other m 2024-01-31T18:32:28.42
IV.SEI.HHN. ML:1.3 0.000177 0.44 AML other m 2024-01-31T18:32:28.56
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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