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) 44.336, 11.552 at 31 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
Casalfiumanese BO 7 3438 3438
Dozza BO 7 6652 10090
Borgo Tossignano BO 7 3288 13378
Castel San Pietro Terme BO 8 20811 34189
Fontanelice BO 9 1943 36132
Monterenzio BO 12 6035 42167
Imola BO 13 69797 111964
Ozzano dell'Emilia BO 14 13596 125560
Casola Valsenio RA 14 2617 128177
Castel del Rio BO 14 1246 129423
Castel Guelfo di Bologna BO 15 4455 133878
Riolo Terme RA 15 5720 139598
Medicina BO 17 16739 156337
Pianoro BO 17 17460 173797
San Lazzaro di Savena BO 19 32065 205862
Loiano BO 20 4294 210156
Castel Bolognese RA 20 9554 219710

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 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)
52 Km W of Ravenna (159116 inhabitants)
56 Km S of Ferrara (133155 inhabitants)
59 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)
71 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)
86 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
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
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 ± 0.47
Latitude 44.3358 ± 0.0207
Longitude 11.5520 ± 0.0201
Depth (km) 31 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96273221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2121
Semi-minor axis of confidence ellipse (meter) 1188
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 23
Circular confidence region, given by single value of horizontal uncertainty (meter) 2120
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 230
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31386
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 5
Magnitude information

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 Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2021-10-05T19:42:17.95 3.0 undecidable manual S 0.16 0
IV.TREG.EHZ. 2021-10-05T19:42:15.67 3.0 undecidable manual P -0.49 0
IV.FIR.HHZ. 2021-10-05T19:42:04.53 3.0 undecidable manual P 1.6 0
IV.LMD.HHZ. 2021-10-05T19:42:02.16 0.3 undecidable manual S 157 0.2815 131 0.32 69
IV.SEI.HHZ. 2021-10-05T19:42:02.60 0.3 undecidable manual S 206 0.3139 127 0.01 72
IV.BRIS.HHZ. 2021-10-05T19:41:59.84 0.3 undecidable manual S 126 0.1898 143 -0.12 73
IV.MTRZ.HHZ. 2021-10-05T19:41:58.97 0.3 undecidable manual S 256 0.0935 160 0.38 70
IV.VISG.HHZ. 2021-10-05T19:41:58.91 0.3 undecidable manual S 210 0.1691 146 -0.71 63
IV.SEI.HHZ. 2021-10-05T19:41:57.08 0.3 undecidable manual P 206 0.3139 127 0.26 69
IV.LMD.HHZ. 2021-10-05T19:41:56.41 0.1 undecidable manual P 157 0.2815 131 0.02 98
IV.BRIS.HHZ. 2021-10-05T19:41:55.32 0.3 undecidable manual P 126 0.1898 143 0.01 75
IV.MTRZ.HHZ. 2021-10-05T19:41:54.60 0.1 undecidable manual P 256 0.0935 160 0.09 100
IV.VISG.HHZ. 2021-10-05T19:41:54.66 0.3 undecidable manual P 210 0.1691 146 -0.45 68
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 7.265E-5 0.14 AML other m 2021-10-05T19:41:59.25
IV.MTRZ.HHE. ML:1.7 0.00021240207 0.256 AML other m 2021-10-05T19:42:00.84
IV.MTRZ.HHN. ML:1.8 0.0002845 0.26 AML other m 2021-10-05T19:42:00.74
IV.MTRZ.HNE. ML:1.8 0.0002919637 0.3968 AML other m 2021-10-05T19:42:00.06
IV.MTRZ.HNN. ML:1.7 0.00025389195 0.2944 AML other m 2021-10-05T19:42:00.74
IV.BRIS.HHE. ML:1.2 6.665826E-5 0.1408 AML other m 2021-10-05T19:41:59.88
IV.BRIS.HHN. ML:1 3.3089355E-5 0.0896 AML other m 2021-10-05T19:42:00.28
IV.LMD.HHE. ML:1.3 7.0979565E-5 0.2816 AML other m 2021-10-05T19:42:02.45
IV.LMD.HHN. ML:1.3 6.796299E-5 0.2176 AML other m 2021-10-05T19:42:02.62
IV.SEI.HHE. ML:1.4 6.9363555E-5 0.1792 AML other m 2021-10-05T19:42:03.42
IV.SEI.HHN. ML:1.9 0.00021574775 0.1792 AML other m 2021-10-05T19:42:03.24
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