Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 16-06-2021 and time 09:40:10 (UTC) in region 1 km W Marradi (FI)

A magnitude ML 0.6 earthquake occured in region: 1 km W Marradi (FI), on

  • 16-06-2021 09:40:10 (UTC)
  • 16-06-2021 11:40:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0760, 11.6040 at 8 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
Marradi FI 1 3139 3139
Palazzuolo sul Senio FI 6 1154 4293
Tredozio FC 11 1212 5505
Portico e San Benedetto FC 15 756 6261
San Godenzo FI 17 1167 7428
Casola Valsenio RA 17 2617 10045
Castel del Rio BO 17 1246 11291
Modigliana FC 18 4560 15851
Premilcuore FC 18 799 16650
Firenzuola FI 19 4726 21376
Rocca San Casciano FC 19 1910 23286
Vicchio FI 19 8044 31330

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km S of Imola (69797 inhabitants)
32 Km SW of Faenza (58541 inhabitants)
39 Km W of Forlì (117913 inhabitants)
44 Km NE of Firenze (382808 inhabitants)
46 Km E of Prato (191150 inhabitants)
49 Km NE of Scandicci (50609 inhabitants)
51 Km SE of Bologna (386663 inhabitants)
52 Km W of Cesena (96758 inhabitants)
57 Km E of Pistoia (90315 inhabitants)
61 Km SW of Ravenna (159116 inhabitants)
71 Km NW of Arezzo (99543 inhabitants)
77 Km W of Rimini (147750 inhabitants)
83 Km SE of Modena (184973 inhabitants)
85 Km S of Ferrara (133155 inhabitants)
87 Km N of Siena (53903 inhabitants)
92 Km E of Lucca (89046 inhabitants)
97 Km SE of Carpi (70699 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
Reviewed
Rev100 		ML 0.6 2021-06-16
09:40:10		 44.0758 11.6042 8 2021-06-16
09:49:12		 Sala Sismica INGV-Roma 91385471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-16 09:40:10 ± 0.13
Latitude 44.0758 ± 0.0063
Longitude 11.6042 ± 0.0075
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 91385471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 583
Semi-minor axis of confidence ellipse (meter) 397
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 230
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
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) 0.07374
Epicentral distance of station farthest from the epicenter (degree) 0.30937
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 91385471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-16 09:49:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2021-06-16T09:40:23.00 0.3 undecidable manual S 154 34.3434 50 0.32 69
IV.RUFI.EHZ. 2021-06-16T09:40:20.62 0.3 undecidable manual S 196 27.4503 107 0.22 71
IV.SFI.EHZ. 2021-06-16T09:40:20.74 0.3 undecidable manual S 134 27.1506 107 0.45 68
IV.SEI.HHZ. 2021-06-16T09:40:18.29 0.3 undecidable manual S 263 19.7691 113 0.41 69
IV.BRIS.HHZ. 2021-06-16T09:40:18.72 0.3 undecidable manual S 38 20.9679 112 0.45 68
IV.VISG.HHZ. 2021-06-16T09:40:17.77 0.3 undecidable manual S 313 18.4704 114 0.3 71
IV.ASQU.HHZ. 2021-06-16T09:40:17.15 0.3 positive manual P 154 34.3434 50 -0.36 68
IV.RUFI.EHZ. 2021-06-16T09:40:16.04 0.3 undecidable manual P 196 27.4503 107 -0.15 72
IV.MTRZ.HNE. 2021-06-16T09:40:16.56 0.6 undecidable manual P 332 29.9478 106 -0.1 48
IV.BRIS.HHZ. 2021-06-16T09:40:15.15 0.3 negative manual P 38 20.9679 112 0.19 72
IV.SFI.EHZ. 2021-06-16T09:40:15.90 0.3 positive manual P 134 27.1506 107 -0.23 71
IV.SEI.HHZ. 2021-06-16T09:40:14.40 0.1 positive manual P 263 19.7691 113 -0.34 94
IV.LMD.HHZ. 2021-06-16T09:40:14.38 0.1 undecidable manual S 89 8.1807 135 -0.12 100
IV.VISG.HHZ. 2021-06-16T09:40:13.92 0.6 negative manual P 313 18.4704 114 -0.58 44
IV.LMD.HHZ. 2021-06-16T09:40:12.23 0.3 positive manual P 89 8.1807 135 -0.56 68
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHE. ML:1.2 0.00011999999999999999 0.36 AML other m 2021-06-16T09:40:18.54
IV.VISG.HHN. ML:0.5 0.000024 0.36 AML other m 2021-06-16T09:40:18.72
IV.VISG.HHE. ML:0.6 0.0000322 0.4 AML other m 2021-06-16T09:40:18.35
IV.SEI.HHN. ML:1.4 0.00017299999999999998 0.48 AML other m 2021-06-16T09:40:18.60
IV.SFI.EHE. ML:0.4 0.00001743807 0.256 AML other m 2021-06-16T09:40:21.47
IV.SFI.EHN. ML:0.4 0.0000164621205 0.16 AML other m 2021-06-16T09:40:21.25
IV.ASQU.HHE. ML:0.7 0.000018971490000000002 0.2368 AML other m 2021-06-16T09:40:23.45
IV.ASQU.HHN. ML:0.7 0.000017591514999999997 0.2624 AML other m 2021-06-16T09:40:24.20
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