Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 02-06-2020 and time 23:30:34 (UTC) in region 7 km N Marradi (FI)

A magnitude ML 0.4 earthquake occured in region: 7 km N Marradi (FI), on

  • 02-06-2020 23:30:34 (UTC)
  • 03-06-2020 01:30:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1350, 11.6260 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
Marradi FI 7 3139 3139
Palazzuolo sul Senio FI 7 1154 4293
Casola Valsenio RA 10 2617 6910
Tredozio FC 11 1212 8122
Castel del Rio BO 13 1246 9368
Modigliana FC 14 4560 13928
Fontanelice BO 15 1943 15871
Brisighella RA 15 7639 23510
Borgo Tossignano BO 16 3288 26798
Portico e San Benedetto FC 17 756 27554
Riolo Terme RA 18 5720 33274
Casalfiumanese BO 18 3438 36712
Rocca San Casciano FC 19 1910 38622
Firenzuola FI 20 4726 43348

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km S of Imola (69797 inhabitants)
27 Km SW of Faenza (58541 inhabitants)
35 Km W of Forlì (117913 inhabitants)
46 Km SE of Bologna (386663 inhabitants)
49 Km W of Cesena (96758 inhabitants)
50 Km NE of Firenze (382808 inhabitants)
51 Km NE of Prato (191150 inhabitants)
55 Km NE of Scandicci (50609 inhabitants)
56 Km SW of Ravenna (159116 inhabitants)
61 Km E of Pistoia (90315 inhabitants)
76 Km W of Rimini (147750 inhabitants)
77 Km N of Arezzo (99543 inhabitants)
78 Km S of Ferrara (133155 inhabitants)
80 Km SE of Modena (184973 inhabitants)
93 Km SE of Carpi (70699 inhabitants)
94 Km N of Siena (53903 inhabitants)
96 Km E of Lucca (89046 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 0.4 2020-06-02
23:30:34		 44.1353 11.6258 10 2020-11-19
12:37:04		 Bollettino Sismico Italiano INGV 83777151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-06-02 23:30:34 ± 0.27
Latitude 44.1353 ± 0.0054
Longitude 11.6258 ± 0.0063
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83777151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 574
Semi-minor axis of confidence ellipse (meter) 304
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 343
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.08184
Epicentral distance of station farthest from the epicenter (degree) 0.20864
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 83777151
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-14 14:33:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SEI.HHZ. 2020-06-02T23:30:43.00 0.3 undecidable manual S 247 23.1546 112 0.26 70
IV.RONT.HHZ. 2020-06-02T23:30:42.54 0.3 undecidable manual S 224 21.9669 114 0.16 72
IV.BRIS.HHZ. 2020-06-02T23:30:40.48 0.3 undecidable manual S 48 14.9739 123 0.27 71
IV.VISG.HHZ. 2020-06-02T23:30:40.50 0.3 undecidable manual S 291 16.3725 120 -0.13 73
IV.RONT.HHZ. 2020-06-02T23:30:39.62 3.0 undecidable manual P 224 21.9669 114 0.76 0
IV.LMD.HHZ. 2020-06-02T23:30:38.46 0.3 undecidable manual S 135 9.0798 136 -0.18 73
IV.SEI.HHZ. 2020-06-02T23:30:38.96 0.3 undecidable manual P 247 23.1546 112 -0.11 73
IV.VISG.HHZ. 2020-06-02T23:30:37.69 0.1 undecidable manual P 291 16.3725 120 -0.17 97
IV.BRIS.HHZ. 2020-06-02T23:30:37.62 0.1 undecidable manual P 48 14.9739 123 0.01 100
IV.LMD.HHZ. 2020-06-02T23:30:36.63 0.3 undecidable manual P 135 9.0798 136 -0.07 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:0.2 0.000019915574999999998 0.0896 AML other m 2020-06-02T23:30:38.54
IV.LMD.HHN. ML:0.2 0.0000203336 0.1152 AML other m 2020-06-02T23:30:38.82
IV.BRIS.HHE. ML:0.5 0.000028667865 0.1024 AML other m 2020-06-02T23:30:40.89
IV.BRIS.HHN. ML:0.6 0.000041198750000000006 0.2048 AML other m 2020-06-02T23:30:40.73
IV.RONT.HHN. ML:0.6 0.000026434015 0.2432 AML other m 2020-06-02T23:30:43.59
IV.RONT.HHE. ML:0.6 0.00002749101 0.1408 AML other m 2020-06-02T23:30:42.97
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