Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 04-06-2020 and time 18:48:19 (Italy) in region 6 km N Marradi (FI)

A magnitude ML 1.2 earthquake occured in region: 6 km N Marradi (FI), on

  • 04-06-2020 16:48:19 (UTC)
  • 04-06-2020 18:48:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1260, 11.6260 at 9 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.

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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 6 3139 3139
Palazzuolo sul Senio FI 6 1154 4293
Tredozio FC 11 1212 5505
Casola Valsenio RA 11 2617 8122
Castel del Rio BO 14 1246 9368
Modigliana FC 14 4560 13928
Fontanelice BO 16 1943 15871
Brisighella RA 16 7639 23510
Portico e San Benedetto FC 17 756 24266
Borgo Tossignano BO 17 3288 27554
Riolo Terme RA 19 5720 33274
Rocca San Casciano FC 19 1910 35184
Casalfiumanese BO 19 3438 38622
Firenzuola FI 20 4726 43348

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km S of Imola (69797 inhabitants)
27 Km SW of Faenza (58541 inhabitants)
35 Km W of Forlì (117913 inhabitants)
47 Km SE of Bologna (386663 inhabitants)
49 Km W of Cesena (96758 inhabitants)
49 Km NE of Firenze (382808 inhabitants)
50 Km NE of Prato (191150 inhabitants)
54 Km NE of Scandicci (50609 inhabitants)
56 Km SW of Ravenna (159116 inhabitants)
61 Km E of Pistoia (90315 inhabitants)
75 Km W of Rimini (147750 inhabitants)
76 Km N of Arezzo (99543 inhabitants)
79 Km S of Ferrara (133155 inhabitants)
80 Km SE of Modena (184973 inhabitants)
93 Km N of Siena (53903 inhabitants)
94 Km SE of Carpi (70699 inhabitants)
95 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
Reviewed
Rev100 		ML 1.2 2020-06-04
16:48:19		 44.1257 11.6263 9 2020-06-04
16:56:47		 Sala Sismica INGV-Roma 79901241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-06-04 16:48:19 ± 0.12
Latitude 44.1257 ± 0.0072
Longitude 11.6263 ± 0.0075
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 79901241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 669
Semi-minor axis of confidence ellipse (meter) 615
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 352
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.07554
Epicentral distance of station farthest from the epicenter (degree) 0.34894
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:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 79901241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-06-04 16:56:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2020-06-04T16:48:32.78 0.6 undecidable manual S 160 38.7279 50 0.38 44
IV.RUFI.EHZ. 2020-06-04T16:48:30.93 0.6 undecidable manual S 196 33.2445 50 -0.01 48
IV.SEI.HHZ. 2020-06-04T16:48:27.66 0.6 undecidable manual S 250 22.755 112 0.03 49
IV.RONT.HHZ. 2020-06-04T16:48:27.74 0.6 undecidable manual S 227 21.2676 113 0.58 43
IV.ASQU.HHZ. 2020-06-04T16:48:26.84 0.1 undecidable manual P 160 38.7279 50 0.04 95
IV.VISG.HHZ. 2020-06-04T16:48:25.46 0.6 undecidable manual S 295 16.7721 118 -0.3 47
IV.RUFI.EHZ. 2020-06-04T16:48:25.58 0.1 undecidable manual P 196 33.2445 50 -0.38 89
IV.MTRZ.HHE. 2020-06-04T16:48:25.45 0.1 undecidable manual P 322 26.2515 109 0.75 80
IV.BRIS.HHZ. 2020-06-04T16:48:25.54 0.6 undecidable manual S 45 15.6732 120 0.13 48
IV.RONT.HHZ. 2020-06-04T16:48:23.85 0.1 undecidable manual P 227 21.2676 113 0.08 97
IV.LMD.HHZ. 2020-06-04T16:48:23.36 0.6 undecidable manual S 130 8.3805 137 -0.05 50
IV.SEI.HHZ. 2020-06-04T16:48:23.81 0.1 undecidable manual P 250 22.755 112 -0.24 94
IV.BRIS.HHZ. 2020-06-04T16:48:22.59 0.1 undecidable manual P 45 15.6732 120 -0.17 96
IV.VISG.HHZ. 2020-06-04T16:48:22.64 0.1 undecidable manual P 295 16.7721 118 -0.32 93
IV.LMD.HHZ. 2020-06-04T16:48:21.57 0.1 undecidable manual P 130 8.3805 137 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.2 0.0002585 0.4 AML other m 2020-06-04T16:48:23.58
IV.LMD.HHN. ML:1.0 0.000148 0.84 AML other m 2020-06-04T16:48:24.17
IV.BRIS.HHN. ML:1.2 0.00016849999999999998 0.9 AML other m 2020-06-04T16:48:25.68
IV.BRIS.HHE. ML:1.3 0.0001895 0.34 AML other m 2020-06-04T16:48:25.74
IV.VISG.HHE. ML:1.0 0.00008175000000000001 1.22 AML other m 2020-06-04T16:48:26.15
IV.VISG.HHN. ML:1.1 0.00011695 1.02 AML other m 2020-06-04T16:48:26.53
IV.SEI.HHN. ML:1.5 0.00022749999999999997 0.26 AML other m 2020-06-04T16:48:28.16
IV.SEI.HHE. ML:1.3 0.000136 0.56 AML other m 2020-06-04T16:48:28.91
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