Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 22-01-2021 and time 18:17:52 (Italy) in region 4 km N Bagno di Romagna (FC)

A magnitude ML 1.4 earthquake occured in region: 4 km N Bagno di Romagna (FC), on

  • 22-01-2021 17:17:52 (UTC)
  • 22-01-2021 18:17:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.89, 11.97 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.

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 4 6026 6026
Santa Sofia FC 8 4136 10162
Verghereto FC 11 1907 12069
Galeata FC 13 2516 14585
Civitella di Romagna FC 13 3786 18371
Sarsina FC 14 3446 21817
Premilcuore FC 18 799 22616
Casteldelci RN 19 407 23023
Sant'Agata Feltria RN 20 2151 25174
Mercato Saraceno FC 20 6886 32060

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Cesena (96758 inhabitants)
38 Km S of Forlì (117913 inhabitants)
45 Km S of Faenza (58541 inhabitants)
48 Km N of Arezzo (99543 inhabitants)
52 Km W of Rimini (147750 inhabitants)
55 Km SE of Imola (69797 inhabitants)
59 Km E of Firenze (382808 inhabitants)
62 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)
82 Km NE of Siena (53903 inhabitants)
84 Km SE of Bologna (386663 inhabitants)
84 Km E of Pistoia (90315 inhabitants)
85 Km W of Fano (60888 inhabitants)
93 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 1.4 2021-01-22
17:17:52		 43.89 11.97 10 2021-01-22
17:27:13		 Sala Sismica INGV-Roma 86464821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-22 17:17:52 ± 0.3
Latitude 43.89 ± 0.01
Longitude 11.97 ± 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 86464821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1795
Semi-minor axis of confidence ellipse (meter) 1102
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 249
Circular confidence region, given by single value of horizontal uncertainty (meter) 1790
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.49
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.36423
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 86464821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-22 17:27:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ZONE.HHZ. 2021-01-22T17:18:57.90 3.0 undecidable manual Sn 0.13 0
IV.VOBA.HNZ. 2021-01-22T17:18:52.69 3.0 undecidable manual Sn 0.73 0
IV.TERO.HHZ. 2021-01-22T17:18:52.88 3.0 undecidable manual Sg 5.44 0
IV.VITU.HHZ. 2021-01-22T17:18:51.50 3.0 undecidable manual Pg 6.52 0
IV.PTRJ.HNZ. 2021-01-22T17:18:49.13 3.0 undecidable manual Pg 6.74 0
IV.GAVE.EHZ. 2021-01-22T17:18:41.51 3.0 undecidable manual S 3.91 0
IV.LNSS.HHZ. 2021-01-22T17:18:40.72 3.0 undecidable manual S -0.21 0
IV.MF5.EHZ. 2021-01-22T17:18:39.65 3.0 undecidable manual S -0.19 0
IV.GUMA.HHZ. 2021-01-22T17:18:37.78 3.0 undecidable manual S 0.8 0
IV.NRCA.HNZ. 2021-01-22T17:18:36.85 3.0 undecidable manual S -0.68 0
IV.CSP1.EHZ. 2021-01-22T17:18:34.82 3.0 undecidable manual S 0.18 0
IV.CESI.HHZ. 2021-01-22T17:18:33.53 3.0 undecidable manual S 1.63 0
IV.FDMO.HHZ. 2021-01-22T17:18:32.77 3.0 undecidable manual S -1.04 0
IT.MTCL.HGZ. 2021-01-22T17:18:32.48 3.0 undecidable manual S -0.83 0
IV.FDMO.HHZ. 2021-01-22T17:18:19.93 3.0 undecidable manual P 4.32 0
IV.CRTC.HHZ. 2021-01-22T17:18:10.67 3.0 positive manual P 1.93 0
IV.BRIS.HHZ. 2021-01-22T17:18:07.20 0.3 undecidable manual S 337 0.3642 50 1.36 43
IV.NARO.HHZ. 2021-01-22T17:18:06.33 3.0 undecidable manual P 0.93 0
IV.RUFI.EHZ. 2021-01-22T17:18:05.23 0.3 undecidable manual S 261 0.3354 50 0.26 68
IV.CRE.HHZ. 2021-01-22T17:18:03.20 0.3 undecidable manual S 183 0.2716 50 0.12 71
IV.LMD.HHZ. 2021-01-22T17:18:01.99 0.3 undecidable manual S 315 0.2653 50 -0.91 56
IV.BRIS.HHZ. 2021-01-22T17:18:00.56 0.1 undecidable manual P 337 0.3642 50 0.42 88
IV.PARC.HHZ. 2021-01-22T17:17:59.07 0.1 undecidable manual P 141 0.3103 50 -0.14 94
IV.ASQU.HHZ. 2021-01-22T17:17:59.48 0.1 undecidable manual S 234 0.1601 120 0.05 99
IV.RUFI.EHZ. 2021-01-22T17:17:59.68 0.1 undecidable manual P 261 0.3354 50 0.04 95
IV.CRE.HHZ. 2021-01-22T17:17:58.50 0.1 undecidable manual P 183 0.2716 50 -0.05 96
IV.LMD.HHZ. 2021-01-22T17:17:57.44 0.1 undecidable manual P 315 0.2653 50 -1 71
IV.SFI.EHZ. 2021-01-22T17:17:57.18 0.6 undecidable manual S 279 0.089 136 -0.07 50
IV.ASQU.HHZ. 2021-01-22T17:17:56.53 0.1 undecidable manual P 234 0.1601 120 0.09 98
IV.SFI.EHZ. 2021-01-22T17:17:55.23 0.1 positive manual P 279 0.089 136 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHN. ML:1.3 0.0002345 0.24 AML other m 2021-01-22T17:17:57.31
IV.SFI.EHE. ML:1.2 0.000187 1.02 AML other m 2021-01-22T17:17:57.93
IV.ASQU.HHN. ML:1.4 0.0001855 0.16 AML other m 2021-01-22T17:17:59.76
IV.ASQU.HHE. ML:1.4 0.000202 0.16 AML other m 2021-01-22T17:17:59.74
IV.NARO.HHN. ML:1.7 0.0001043 1.5 AML other m 2021-01-22T17:18:07.92
IV.NARO.HHE. ML:1.7 0.0001011 1.16 AML other m 2021-01-22T17:18:11.03
IV.FDMO.HHE. ML:3.9 0.005375 0.28 AML other m 2021-01-22T17:18:35.28
IV.FDMO.HHN. ML:3.8 0.003755 0.8 AML other m 2021-01-22T17:18:35.20
IV.CESI.HHN. ML:3.7 0.003485 0.22 AML other m 2021-01-22T17:18:36.53
IV.CESI.HNN. ML:3.7 0.00333 0.22 AML other m 2021-01-22T17:18:36.53
IV.CESI.HNE. ML:3.6 0.002555 1.22 AML other m 2021-01-22T17:18:37.11
IV.CESI.HHE. ML:3.6 0.0027 1.2 AML other m 2021-01-22T17:18:37.11
IV.CSP1.EHE. ML:3.6 0.002485 0.44 AML other m 2021-01-22T17:18:39.26
IV.CSP1.EHN. ML:3.4 0.00177 1.72 AML other m 2021-01-22T17:18:39.94
IV.NRCA.HNN. ML:3.5 0.001545 1.62 AML other m 2021-01-22T17:18:40.83
IV.NRCA.HHN. ML:3.5 0.00163 1.62 AML other m 2021-01-22T17:18:40.83
IV.NRCA.HNE. ML:3.4 0.00121 1.12 AML other m 2021-01-22T17:18:42.33
IV.NRCA.HHE. ML:3.4 0.001285 1.12 AML other m 2021-01-22T17:18:42.33
IV.GUMA.HNE. ML:3.6 0.002335 0.32 AML other m 2021-01-22T17:18:42.57
IV.GUMA.HHE. ML:3.9 0.00406 0.26 AML other m 2021-01-22T17:18:42.55
IV.GUMA.HNN. ML:3.7 0.002975 0.22 AML other m 2021-01-22T17:18:42.52
IV.GUMA.HHN. ML:3.6 0.002245 0.24 AML other m 2021-01-22T17:18:42.52
IV.MF5.EHE. ML:2.9 0.000364 1.54 AML other m 2021-01-22T17:18:46.03
IV.LNSS.HHN. ML:3.1 0.000502 1.82 AML other m 2021-01-22T17:18:47.05
IV.LNSS.HHE. ML:2.9 0.0003485 1.34 AML other m 2021-01-22T17:18:48.76
IV.MF5.EHN. ML:2.9 0.0003925 0.42 AML other m 2021-01-22T17:18:48.88
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