Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 12-07-2022 and time 13:05:04 (Italy) in region 1 km NW Marradi (FI)

A magnitude ML 1.3 earthquake occured in region: 1 km NW Marradi (FI), on

  • 12-07-2022 11:05:04 (UTC)
  • 12-07-2022 13:05:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0850, 11.6060 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.

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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 1 3139 3139
Palazzuolo sul Senio FI 6 1154 4293
Tredozio FC 11 1212 5505
Portico e San Benedetto FC 15 756 6261
Casola Valsenio RA 16 2617 8878
Castel del Rio BO 17 1246 10124
Modigliana FC 17 4560 14684
San Godenzo FI 18 1167 15851
Premilcuore FC 18 799 16650
Firenzuola FI 19 4726 21376
Rocca San Casciano FC 19 1910 23286
Fontanelice BO 20 1943 25229

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km S of Imola (69797 inhabitants)
32 Km SW of Faenza (58541 inhabitants)
38 Km W of Forlì (117913 inhabitants)
45 Km NE of Firenze (382808 inhabitants)
47 Km E of Prato (191150 inhabitants)
50 Km NE of Scandicci (50609 inhabitants)
50 Km SE of Bologna (386663 inhabitants)
51 Km W of Cesena (96758 inhabitants)
58 Km E of Pistoia (90315 inhabitants)
60 Km SW of Ravenna (159116 inhabitants)
72 Km NW of Arezzo (99543 inhabitants)
77 Km W of Rimini (147750 inhabitants)
83 Km SE of Modena (184973 inhabitants)
84 Km S of Ferrara (133155 inhabitants)
88 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 1.3 2022-07-12
11:05:04		 44.0847 11.6062 9 2022-07-12
11:12:02		 Sala Sismica INGV-Roma 107154361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-07-12 11:05:04 ± 0.25
Latitude 44.0847 ± 0.0063
Longitude 11.6062 ± 0.0075
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 107154361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 667
Semi-minor axis of confidence ellipse (meter) 216
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 203
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) 69
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.07285
Epicentral distance of station farthest from the epicenter (degree) 0.26260
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:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 107154361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-07-12 11:12:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SFI.HNZ. 2022-07-12T11:05:15.18 0.3 undecidable manual S 136 27.75 107 0.38 70
IV.RUFI.EHE. 2022-07-12T11:05:15.22 0.3 undecidable manual S 196 28.4493 107 0.18 73
IV.BOSL.HHE. 2022-07-12T11:05:14.26 0.3 undecidable manual S 227 25.1526 109 0.3 71
IV.SEI.HHZ. 2022-07-12T11:05:12.47 0.3 undecidable manual S 260 20.0688 113 0.18 74
IV.MTRZ.HNZ. 2022-07-12T11:05:11.31 0.1 undecidable manual P 330 29.1486 106 0.49 91
IV.VISG.HHZ. 2022-07-12T11:05:11.64 0.3 undecidable manual S 310 17.871 115 0.01 77
IV.BOSL.HHE. 2022-07-12T11:05:10.01 0.1 undecidable manual P 227 25.1526 109 -0.05 100
IV.RUFI.EHE. 2022-07-12T11:05:10.43 0.3 undecidable manual P 196 28.4493 107 -0.26 71
IV.SFI.HNZ. 2022-07-12T11:05:10.32 0.1 undecidable manual P 136 27.75 107 -0.23 96
IV.BRIS.HHZ. 2022-07-12T11:05:09.60 0.3 undecidable manual P 39 20.0688 113 0.49 69
IV.VISG.HHZ. 2022-07-12T11:05:08.27 0.1 undecidable manual P 310 17.871 115 -0.45 93
IV.SEI.HHZ. 2022-07-12T11:05:08.82 0.1 undecidable manual P 260 20.0688 113 -0.28 96
IV.LMD.HHZ. 2022-07-12T11:05:08.88 0.3 undecidable manual S 96 8.0808 136 0.06 77
IV.LMD.HHZ. 2022-07-12T11:05:06.66 0.1 undecidable manual P 96 8.0808 136 -0.44 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHN. ML:1.3 0.0003105 0.82 AML other m 2022-07-12T11:05:09.55
IV.LMD.HHE. ML:1.5 0.0005175000000000001 0.42 AML other m 2022-07-12T11:05:10.13
IV.VISG.HHN. ML:1.1 0.00010059999999999999 1.02 AML other m 2022-07-12T11:05:12.29
IV.VISG.HHE. ML:0.9 0.00007000000000000001 0.94 AML other m 2022-07-12T11:05:12.52
IV.SEI.HHN. ML:1.7 0.0003575 0.48 AML other m 2022-07-12T11:05:13.02
IV.SEI.HHE. ML:1.5 0.00023999999999999998 0.38 AML other m 2022-07-12T11:05:15.19
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