Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 04-11-2021 and time 09:42:54 (Italy) in region 6 km E Bagno di Romagna (FC)

A magnitude ML 1.4 earthquake occured in region: 6 km E Bagno di Romagna (FC), on

  • 04-11-2021 08:42:54 (UTC)
  • 04-11-2021 09:42:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.8460, 12.0500 at 8 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
Bagno di Romagna FC 6 6026 6026
Verghereto FC 7 1907 7933
Casteldelci RN 10 407 8340
Sarsina FC 11 3446 11786
Sant'Agata Feltria RN 13 2151 13937
Santa Sofia FC 16 4136 18073
Mercato Saraceno FC 17 6886 24959
Pennabilli RN 18 2869 27828
Chiusi della Verna AR 19 2023 29851
Badia Tedalda AR 19 1087 30938
Pieve Santo Stefano AR 20 3183 34121

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Cesena (96758 inhabitants)
42 Km S of Forlì (117913 inhabitants)
44 Km NE of Arezzo (99543 inhabitants)
48 Km SW of Rimini (147750 inhabitants)
51 Km S of Faenza (58541 inhabitants)
63 Km SE of Imola (69797 inhabitants)
64 Km E of Firenze (382808 inhabitants)
65 Km S of Ravenna (159116 inhabitants)
70 Km W of Pesaro (94582 inhabitants)
70 Km E of Scandicci (50609 inhabitants)
76 Km E of Prato (191150 inhabitants)
78 Km W of Fano (60888 inhabitants)
82 Km NE of Siena (53903 inhabitants)
87 Km NW of Perugia (166134 inhabitants)
91 Km E of Pistoia (90315 inhabitants)
92 Km SE of Bologna (386663 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 1.4 2021-11-04
08:42:54		 43.8457 12.0503 8 2022-03-30
13:04:17		 Bollettino Sismico Italiano INGV 97744041
Reviewed
Rev100 		ML 1.5 2021-11-04
08:42:54		 43.8567 12.0643 9 2021-11-04
08:48:31		 Sala Sismica INGV-Roma 97250111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-04 08:42:54 ± 0.15
Latitude 43.8457 ± 0.0081
Longitude 12.0503 ± 0.0087
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97744041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1086
Semi-minor axis of confidence ellipse (meter) 152
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 217
Circular confidence region, given by single value of horizontal uncertainty (meter) 1090.0
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 23
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.53959
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 97744041
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-12 16:26:55

ML:1.5

Field Value
Value 1.5
Uncertainty 0.5
Num. used stations 10
Type of magnitude ML
Reference to an origin 97250111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-04 08:48:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TST01.HHZ. 2021-11-04T08:44:12.64 3.0 undecidable manual Sn 2.31 0
IV.CDRU.HNZ. 2021-11-04T08:44:05.68 3.0 undecidable manual Pg 8.96 0
IV.TERO.HHZ. 2021-11-04T08:43:50.66 3.0 undecidable manual Sg 5.71 0
OX.MPRI.HHZ. 2021-11-04T08:43:37.01 3.0 negative manual Pn 1.62 0
IV.GAVE.EHZ. 2021-11-04T08:43:33.86 3.0 undecidable manual S -1.89 0
IV.VIVA.HHZ. 2021-11-04T08:43:30.13 3.0 negative manual Pn 0.81 0
IV.ROM9.HNZ. 2021-11-04T08:43:26.85 3.0 negative manual Pn -0.83 0
IV.SEI.HHZ. 2021-11-04T08:43:14.07 0.6 undecidable manual S 293 59.8956 50 0.62 41
IV.CAFI.HHZ. 2021-11-04T08:43:13.09 0.6 undecidable manual S 187 57.6978 50 0.23 46
IV.PIEI.HNN. 2021-11-04T08:43:11.41 0.6 undecidable manual S 131 51.9036 50 0.09 47
IV.RUFI.EHZ. 2021-11-04T08:43:08.69 0.6 undecidable manual S 269 43.3233 50 -0.33 46
IV.SEI.HHZ. 2021-11-04T08:43:05.44 0.3 undecidable manual P 293 59.8956 50 0.05 71
IV.CRE.HHZ. 2021-11-04T08:43:04.66 0.6 undecidable manual S 198 26.3514 107 0.7 42
IV.PARC.HHZ. 2021-11-04T08:43:04.04 0.6 undecidable manual S 145 26.5512 107 0.02 50
IV.PIEI.HNN. 2021-11-04T08:43:04.40 0.3 undecidable manual P 131 51.9036 50 0.24 69
IV.CAFI.HHZ. 2021-11-04T08:43:04.99 0.3 undecidable manual P 187 57.6978 50 -0.06 71
IV.RUFI.EHZ. 2021-11-04T08:43:02.37 0.1 undecidable manual P 269 43.3233 50 -0.46 89
IV.ASQU.HHZ. 2021-11-04T08:43:02.26 0.6 undecidable manual S 256 21.5673 111 -0.13 50
IV.SFI.EHZ. 2021-11-04T08:43:01.36 0.6 undecidable manual S 292 17.5713 115 0.26 49
IV.CRE.HHZ. 2021-11-04T08:42:59.65 0.1 undecidable manual P 198 26.3514 107 -0.26 96
IV.PARC.HHZ. 2021-11-04T08:42:59.74 0.1 undecidable manual P 145 26.5512 107 -0.2 97
IV.SFI.EHZ. 2021-11-04T08:42:58.42 0.1 undecidable manual P 292 17.5713 115 0.17 99
IV.ASQU.HHZ. 2021-11-04T08:42:58.91 0.1 undecidable manual P 256 21.5673 111 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHN. ML:1.3 0.00016450000000000001 0.32 AML other m 2021-11-04T08:43:01.72
IV.ASQU.HHN. ML:1.6 0.0002585 0.5 AML other m 2021-11-04T08:43:02.98
IV.ASQU.HHE. ML:1.4 0.00017649999999999998 0.28 AML other m 2021-11-04T08:43:03.19
IV.SFI.EHE. ML:1.3 0.00016350000000000002 1.56 AML other m 2021-11-04T08:43:03.14
IV.PARC.HHE. ML:1.2 0.0001015 0.94 AML other m 2021-11-04T08:43:04.38
IV.PARC.HHN. ML:1.3 0.0001246 0.76 AML other m 2021-11-04T08:43:06.08
IV.RUFI.EHE. ML:1.5 0.00011130000000000001 0.5 AML other m 2021-11-04T08:43:08.89
IV.RUFI.EHN. ML:1.4 0.00008444999999999999 0.42 AML other m 2021-11-04T08:43:13.09
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