Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 21-02-2021 and time 04:22:59 (Italy) in region 5 km N Bagno di Romagna (FC)

A magnitude ML 1.1 earthquake occured in region: 5 km N Bagno di Romagna (FC), on

  • 21-02-2021 03:22:59 (UTC)
  • 21-02-2021 04:22:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9010, 11.9720 at 10 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 5 6026 6026
Santa Sofia FC 7 4136 10162
Galeata FC 12 2516 12678
Verghereto FC 12 1907 14585
Civitella di Romagna FC 12 3786 18371
Sarsina FC 14 3446 21817
Premilcuore FC 18 799 22616
Casteldelci RN 19 407 23023
Mercato Saraceno FC 19 6886 29909
Sant'Agata Feltria RN 20 2151 32060

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Cesena (96758 inhabitants)
36 Km S of Forlì (117913 inhabitants)
43 Km S of Faenza (58541 inhabitants)
49 Km N of Arezzo (99543 inhabitants)
51 Km W of Rimini (147750 inhabitants)
54 Km SE of Imola (69797 inhabitants)
59 Km E of Firenze (382808 inhabitants)
60 Km SW of Ravenna (159116 inhabitants)
65 Km E of Scandicci (50609 inhabitants)
70 Km E of Prato (191150 inhabitants)
76 Km W of Pesaro (94582 inhabitants)
83 Km NE of Siena (53903 inhabitants)
83 Km SE of Bologna (386663 inhabitants)
84 Km W of Fano (60888 inhabitants)
84 Km E of Pistoia (90315 inhabitants)
94 Km NW of Perugia (166134 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 1.1 2021-02-21
03:22:59		 43.9008 11.9715 10 2021-07-12
16:55:03		 Bollettino Sismico Italiano INGV 88383761
Reviewed
Rev100 		ML 1.1 2021-02-21
03:22:58		 43.8987 11.9927 10 2021-02-21
03:29:31		 Sala Sismica INGV-Roma 87349931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-21 03:22:59 ± 0.18
Latitude 43.9008 ± 0.0090
Longitude 11.9715 ± 0.0137
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88383761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1178
Semi-minor axis of confidence ellipse (meter) 686
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 1180.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.08993
Epicentral distance of station farthest from the epicenter (degree) 0.57107
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 87349931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-21 03:29:31

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 88383761
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-22 15:59:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2021-02-21T03:23:19.50 0.6 undecidable manual S 180 63.3921 50 0.86 37
IV.PE3.EHZ. 2021-02-21T03:23:15.34 0.6 undecidable manual S 118 47.8188 50 0.88 38
IV.BRIS.HHZ. 2021-02-21T03:23:13.41 0.6 undecidable manual S 336 39.4272 50 1.17 33
IV.CRE.HHZ. 2021-02-21T03:23:10.04 0.6 undecidable manual S 183 31.3464 50 -0.03 50
IV.PARC.HHZ. 2021-02-21T03:23:10.87 0.6 undecidable manual S 143 35.2425 50 -0.25 47
IV.CAFI.HHZ. 2021-02-21T03:23:10.18 0.3 undecidable manual P 180 63.3921 50 -0.17 69
IV.LMD.HHZ. 2021-02-21T03:23:09.27 0.6 undecidable manual S 313 28.749 50 -0.12 49
IV.RINC.HHZ. 2021-02-21T03:23:09.54 0.6 undecidable manual S 267 29.1486 50 0.04 50
IV.PE3.EHZ. 2021-02-21T03:23:08.03 0.3 undecidable manual P 118 47.8188 50 0.1 72
IV.BRIS.HHZ. 2021-02-21T03:23:06.80 0.3 undecidable manual P 336 39.4272 50 0.15 72
IV.ASQU.HHZ. 2021-02-21T03:23:06.95 0.6 undecidable manual S 232 18.5703 118 0.61 44
IV.CPGN.EHZ. 2021-02-21T03:23:05.46 0.3 undecidable manual P 111 30.0477 50 0.26 72
IV.PARC.HHZ. 2021-02-21T03:23:05.32 0.1 undecidable manual P 143 35.2425 50 -0.68 84
IV.LMD.HHZ. 2021-02-21T03:23:04.51 0.3 undecidable manual P 313 28.749 50 -0.5 68
IV.RINC.HHZ. 2021-02-21T03:23:04.79 0.3 undecidable manual P 267 29.1486 50 -0.28 72
IV.CRE.HHZ. 2021-02-21T03:23:04.99 0.1 undecidable manual P 183 31.3464 50 -0.41 92
IV.SFI.EHZ. 2021-02-21T03:23:03.75 0.6 undecidable manual S 273 9.9789 135 -0.16 51
IV.ASQU.HHZ. 2021-02-21T03:23:03.66 0.1 positive manual P 232 18.5703 118 0.42 94
IV.SFI.EHZ. 2021-02-21T03:23:01.63 0.1 undecidable manual P 273 9.9789 135 -0.21 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHN. ML:0.9 0.00011249999999999998 0.28 AML other m 2021-02-21T03:23:03.82
IV.SFI.EHE. ML:1.0 0.00011449999999999999 0.18 AML other m 2021-02-21T03:23:03.83
IV.ASQU.HHE. ML:1.3 0.0001595 0.22 AML other m 2021-02-21T03:23:07.26
IV.ASQU.HHN. ML:1.2 0.0001242 0.2 AML other m 2021-02-21T03:23:07.28
IV.LMD.HHE. ML:1.1 0.0000686 0.22 AML other m 2021-02-21T03:23:09.40
IV.RINC.HHN. ML:0.8 0.00003136 0.74 AML other m 2021-02-21T03:23:09.28
IV.LMD.HHN. ML:1.0 0.0000523 1.34 AML other m 2021-02-21T03:23:10.18
IV.RINC.HHE. ML:1.0 0.0000427 0.26 AML other m 2021-02-21T03:23:10.39
IV.CRE.HHE. ML:0.8 0.000027700000000000002 0.46 AML other m 2021-02-21T03:23:11.43
IV.CRE.HHN. ML:1.1 0.00005405 0.24 AML other m 2021-02-21T03:23:12.90
IV.BRIS.HHE. ML:1.3 0.0000711 0.3 AML other m 2021-02-21T03:23:13.77
IV.BRIS.HHN. ML:1.3 0.00006325 0.42 AML other m 2021-02-21T03:23:14.80
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