Earthquake with magnitude of ML 1.5 on date 05-10-2021 and time 19:41:48 (UTC) in region 7 km NW Casalfiumanese (BO)

A magnitude ML 1.5 earthquake occured in region: 7 km NW Casalfiumanese (BO), on

  • 05-10-2021 19:41:48 (UTC)
  • 05-10-2021 21:41:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3330, 11.5480 at 31 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Casalfiumanese BO 7 3438 3438
Borgo Tossignano BO 7 3288 6726
Dozza BO 7 6652 13378
Castel San Pietro Terme BO 8 20811 34189
Fontanelice BO 8 1943 36132
Monterenzio BO 11 6035 42167
Casola Valsenio RA 14 2617 44784
Imola BO 14 69797 114581
Castel del Rio BO 14 1246 115827
Ozzano dell'Emilia BO 14 13596 129423
Castel Guelfo di Bologna BO 15 4455 133878
Riolo Terme RA 15 5720 139598
Pianoro BO 17 17460 157058
Medicina BO 18 16739 173797
San Lazzaro di Savena BO 19 32065 205862
Loiano BO 19 4294 210156

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Imola (69797 inhabitants)
24 Km SE of Bologna (386663 inhabitants)
27 Km W of Faenza (58541 inhabitants)
41 Km W of Forlì (117913 inhabitants)
53 Km W of Ravenna (159116 inhabitants)
56 Km S of Ferrara (133155 inhabitants)
60 Km W of Cesena (96758 inhabitants)
60 Km SE of Modena (184973 inhabitants)
62 Km NE of Prato (191150 inhabitants)
67 Km NE of Firenze (382808 inhabitants)
67 Km NE of Pistoia (90315 inhabitants)
70 Km NE of Scandicci (50609 inhabitants)
73 Km SE of Carpi (70699 inhabitants)
83 Km E of Reggio nell'Emilia (171345 inhabitants)
84 Km S of Rovigo (51867 inhabitants)
87 Km W of Rimini (147750 inhabitants)
100 Km NE of Lucca (89046 inhabitants)
100 Km N of Arezzo (99543 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 1.5 2021-10-05
19:41:48
44.3332 11.5482 31 2022-03-30
13:04:34
Bollettino Sismico Italiano INGV 100530231
Reviewed
Rev100
ML 1.5 2021-10-05
19:41:48
44.3358 11.552 31 2021-10-05
20:24:03
Sala Sismica INGV-Roma 96273221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-05 19:41:48 ± 0.4
Latitude 44.3332 ± 0.0216
Longitude 11.5482 ± 0.0189
Depth (km) 31 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100530231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2605
Semi-minor axis of confidence ellipse (meter) 614
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 208
Circular confidence region, given by single value of horizontal uncertainty (meter) 2610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 228
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.09083
Epicentral distance of station farthest from the epicenter (degree) 0.31027
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 100530231
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-02 13:18:40

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 96273221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-05 20:24:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LMD.HHZ. 2021-10-05T19:42:02.16 0.3 undecidable manual S 156 31.0467 131 0.29 69
IV.SEI.HHZ. 2021-10-05T19:42:02.60 0.3 undecidable manual S 206 34.4433 128 0.05 71
IV.VISG.HHZ. 2021-10-05T19:41:59.22 0.3 undecidable manual S 210 18.3705 147 -0.4 67
IV.BRIS.HHZ. 2021-10-05T19:41:59.84 0.3 undecidable manual S 125 21.1677 143 -0.2 70
IV.MTRZ.HHZ. 2021-10-05T19:41:58.97 0.3 undecidable manual S 257 10.0788 161 0.34 71
IV.SEI.HHZ. 2021-10-05T19:41:57.08 0.3 undecidable manual P 206 34.4433 128 0.28 69
IV.LMD.HHZ. 2021-10-05T19:41:56.41 0.3 undecidable manual P 156 31.0467 131 0.01 72
IV.BRIS.HHZ. 2021-10-05T19:41:55.32 0.3 undecidable manual P 125 21.1677 143 -0.03 73
IV.VISG.HHZ. 2021-10-05T19:41:54.66 0.3 undecidable manual P 210 18.3705 147 -0.45 66
IV.MTRZ.HHZ. 2021-10-05T19:41:54.60 0.1 undecidable manual P 257 10.0788 161 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHN. ML:1.4 0.0001038 0.1 AML other m 2021-10-05T19:41:59.29
IV.VISG.HHE. ML:1.3 0.00007265 0.14 AML other m 2021-10-05T19:41:59.25
IV.BRIS.HHE. ML:1.2 0.00006665826 0.1408 AML other m 2021-10-05T19:41:59.88
IV.MTRZ.HNE. ML:1.8 0.00029196370000000003 0.3968 AML other m 2021-10-05T19:42:00.06
IV.MTRZ.HHN. ML:1.8 0.0002845 0.26 AML other m 2021-10-05T19:42:00.74
IV.MTRZ.HNN. ML:1.7 0.00025389194999999996 0.2944 AML other m 2021-10-05T19:42:00.74
IV.MTRZ.HHE. ML:1.8 0.0002704866 0.384 AML other m 2021-10-05T19:42:00.25
IV.LMD.HHE. ML:1.4 0.00007097956499999999 0.2816 AML other m 2021-10-05T19:42:02.45
IV.LMD.HHN. ML:1.4 0.00006796299 0.2176 AML other m 2021-10-05T19:42:02.62
IV.SEI.HHN. ML:1.9 0.00021574775 0.1792 AML other m 2021-10-05T19:42:03.24
IV.SEI.HHE. ML:1.4 0.000074101055 0.4992 AML other m 2021-10-05T19:42:05.36
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