Earthquake with magnitude of ML 1.1 on date 21-02-2021 and time 04:22:58 (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 03:22:58 (UTC)
  • 21-02-2021 04:22:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9, 11.99 at 10 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
Bagno di Romagna FC 5 6026 6026
Santa Sofia FC 9 4136 10162
Verghereto FC 11 1907 12069
Sarsina FC 12 3446 15515
Galeata FC 13 2516 18031
Civitella di Romagna FC 13 3786 21817
Mercato Saraceno FC 18 6886 28703
Casteldelci RN 18 407 29110
Sant'Agata Feltria RN 18 2151 31261
Premilcuore FC 19 799 32060

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Cesena (96758 inhabitants)
36 Km S of Forlì (117913 inhabitants)
44 Km S of Faenza (58541 inhabitants)
49 Km N of Arezzo (99543 inhabitants)
49 Km W of Rimini (147750 inhabitants)
55 Km SE of Imola (69797 inhabitants)
60 Km S of Ravenna (159116 inhabitants)
61 Km E of Firenze (382808 inhabitants)
67 Km E of Scandicci (50609 inhabitants)
72 Km E of Prato (191150 inhabitants)
74 Km W of Pesaro (94582 inhabitants)
83 Km W of Fano (60888 inhabitants)
84 Km NE of Siena (53903 inhabitants)
84 Km SE of Bologna (386663 inhabitants)
86 Km E of Pistoia (90315 inhabitants)
94 Km NW of Perugia (166134 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 1.1 2021-02-21
03:22:58
43.9 11.99 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 03:22:58 ± 0.22
Latitude 43.90 ± 0.01
Longitude 11.99 ± 0.02
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87349931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1366
Semi-minor axis of confidence ellipse (meter) 623
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 1370
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.56927
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 8
Magnitude 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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ZCCA.HHZ. 2021-02-21T03:23:30.49 3.0 undecidable manual S 0.11 0
IV.BRIS.HHZ. 2021-02-21T03:23:13.37 0.6 undecidable manual S 334 0.3642 50 1 38
IV.CRE.HHZ. 2021-02-21T03:23:10.17 0.6 undecidable manual S 186 0.2815 50 0.26 50
IV.PARC.HHZ. 2021-02-21T03:23:10.87 0.6 undecidable manual S 145 0.3067 50 0.21 51
IV.CAFI.HHZ. 2021-02-21T03:23:10.18 0.1 undecidable manual P 182 0.5693 50 0.02 100
IV.LMD.HHZ. 2021-02-21T03:23:09.27 0.6 undecidable manual S 311 0.2725 50 -0.38 49
IV.RINC.HHZ. 2021-02-21T03:23:09.54 0.6 undecidable manual S 268 0.2779 50 -0.28 50
IV.PE3.EHZ. 2021-02-21T03:23:08.11 3.0 negative manual P 0.7 0
IV.ASQU.HHZ. 2021-02-21T03:23:06.90 0.6 undecidable manual S 235 0.1781 116 0.4 50
IV.BRIS.HHZ. 2021-02-21T03:23:06.90 0.3 negative manual P 334 0.3642 50 0.25 75
IV.CRE.HHZ. 2021-02-21T03:23:05.01 0.3 positive manual P 186 0.2815 50 -0.22 76
IV.PARC.HHZ. 2021-02-21T03:23:05.32 0.1 undecidable manual P 145 0.3067 50 -0.34 99
IV.RINC.HHZ. 2021-02-21T03:23:04.98 0.6 undecidable manual P 268 0.2779 50 -0.19 51
IV.LMD.HHZ. 2021-02-21T03:23:04.55 1.0 positive manual P 311 0.2725 50 -0.53 24
IV.SFI.EHZ. 2021-02-21T03:23:03.75 0.6 undecidable manual S 273 0.1052 130 -0.37 51
IV.ASQU.HHZ. 2021-02-21T03:23:03.66 0.1 positive manual P 235 0.1781 116 0.4 100
IV.SFI.EHZ. 2021-02-21T03:23:01.64 0.3 positive manual P 273 0.1052 130 -0.24 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHN. ML:1 0.0001125 0.28 AML other m 2021-02-21T03:23:03.82
IV.SFI.EHE. ML:1 0.0001145 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:1.2 6.86E-5 0.22 AML other m 2021-02-21T03:23:09.40
IV.RINC.HHN. ML:0.8 3.136E-5 0.74 AML other m 2021-02-21T03:23:09.28
IV.LMD.HHN. ML:1 5.23E-5 1.34 AML other m 2021-02-21T03:23:10.18
IV.RINC.HHE. ML:1 4.27E-5 0.26 AML other m 2021-02-21T03:23:10.39
IV.CRE.HHE. ML:0.8 2.77E-5 0.46 AML other m 2021-02-21T03:23:11.43
IV.CRE.HHN. ML:1.1 5.405E-5 0.24 AML other m 2021-02-21T03:23:12.90
IV.BRIS.HHE. ML:1.3 7.11E-5 0.3 AML other m 2021-02-21T03:23:13.77
IV.BRIS.HHN. ML:1.3 6.325E-5 0.42 AML other m 2021-02-21T03:23:14.80
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download