Earthquake with magnitude of ML 1.6 on date 08-07-2020 and time 23:18:35 (UTC) in region 4 km SW Marradi (FI)

A magnitude ML 1.6 earthquake occured in region: 4 km SW Marradi (FI), on

  • 08-07-2020 23:18:35 (UTC)
  • 09-07-2020 01:18:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0580, 11.5700 at 55 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.

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 4 3139 3139
Palazzuolo sul Senio FI 6 1154 4293
Tredozio FC 14 1212 5505
San Godenzo FI 15 1167 6672
Vicchio FI 16 8044 14716
Firenzuola FI 17 4726 19442
Portico e San Benedetto FC 17 756 20198
Castel del Rio BO 18 1246 21444
Borgo San Lorenzo FI 18 18211 39655
Dicomano FI 19 5515 45170
Premilcuore FC 19 799 45969
Casola Valsenio RA 19 2617 48586

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Imola (69797 inhabitants)
36 Km SW of Faenza (58541 inhabitants)
41 Km NE of Firenze (382808 inhabitants)
42 Km W of Forlì (117913 inhabitants)
43 Km E of Prato (191150 inhabitants)
46 Km NE of Scandicci (50609 inhabitants)
52 Km SE of Bologna (386663 inhabitants)
54 Km E of Pistoia (90315 inhabitants)
55 Km W of Cesena (96758 inhabitants)
64 Km SW of Ravenna (159116 inhabitants)
70 Km NW of Arezzo (99543 inhabitants)
80 Km W of Rimini (147750 inhabitants)
83 Km SE of Modena (184973 inhabitants)
84 Km N of Siena (53903 inhabitants)
87 Km S of Ferrara (133155 inhabitants)
89 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
Bulletin
Rev1000
ML 1.6 2020-07-08
23:18:35
44.0577 11.5702 55 2020-11-19
12:36:55
Bollettino Sismico Italiano INGV 81444991
Reviewed
Rev100
ML 1.8 2020-07-08
23:18:35
44.0662 11.53 52 2020-07-08
23:28:30
Sala Sismica INGV-Roma 80894011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-08 23:18:35 ± 0.17
Latitude 44.0577 ± 0.0090
Longitude 11.5702 ± 0.0113
Depth (km) 55 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 81444991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 961
Semi-minor axis of confidence ellipse (meter) 347
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 213
Circular confidence region, given by single value of horizontal uncertainty (meter) 960.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 48
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.10072
Epicentral distance of station farthest from the epicenter (degree) 0.61783
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 81444991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-07-29 09:04:01

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 56
Type of magnitude ML
Reference to an origin 80894011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-08 23:28:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2020-07-08T23:18:52.27 0.6 undecidable manual S 149 33.8439 142 0.08 48
IV.MPPT.EHZ. 2020-07-08T23:18:52.87 0.6 undecidable manual S 254 39.8268 136 -0.18 47
IV.SFI.EHZ. 2020-07-08T23:18:51.94 0.3 undecidable manual S 127 27.8499 147 0.49 66
IV.VISG.HHZ. 2020-07-08T23:18:50.86 0.3 undecidable manual S 323 18.1707 158 0.38 69
IV.SEI.HHZ. 2020-07-08T23:18:50.15 0.6 undecidable manual S 269 16.872 159 -0.23 49
IV.RINC.HHZ. 2020-07-08T23:18:50.78 0.6 undecidable manual S 171 19.2696 157 0.21 48
IV.RONT.HHZ. 2020-07-08T23:18:50.01 0.6 undecidable manual S 237 13.0758 164 -0.11 51
IV.RUFI.EHZ. 2020-07-08T23:18:50.66 0.6 undecidable manual S 191 24.8529 151 -0.45 46
IV.BRIS.HHZ. 2020-07-08T23:18:50.91 0.3 undecidable manual S 40 24.2535 151 -0.14 73
IV.LMD.HHZ. 2020-07-08T23:18:49.65 0.6 undecidable manual S 79 11.1777 166 -0.37 48
IV.CSNT.HHZ. 2020-07-08T23:18:48.40 0.1 undecidable manual P 199 68.5758 117 0.07 92
GU.POPM.HHZ. 2020-07-08T23:18:47.89 0.1 undecidable manual P 269 64.8906 119 -0.02 91
IV.CRE.HHZ. 2020-07-08T23:18:47.62 0.3 undecidable manual P 148 57.498 123 0.49 65
IV.CRMI.HHZ. 2020-07-08T23:18:46.81 0.1 undecidable manual P 239 55.4001 124 -0.1 92
IV.MTRZ.HNN. 2020-07-08T23:18:45.24 0.3 undecidable manual P 338 30.5472 145 0.55 66
IV.ASQU.HHZ. 2020-07-08T23:18:45.14 0.1 undecidable manual P 149 33.8439 142 0.2 95
IV.IMOL.HNZ. 2020-07-08T23:18:45.26 0.3 undecidable manual P 22 36.1416 139 0.13 72
IV.MPPT.EHZ. 2020-07-08T23:18:45.40 0.3 positive manual P 254 39.8268 136 -0.04 72
IV.FNVD.HHZ. 2020-07-08T23:18:45.74 0.3 undecidable manual P 289 37.629 138 0.5 66
IV.RUFI.EHZ. 2020-07-08T23:18:44.23 0.1 positive manual P 191 24.8529 151 -0.09 97
IV.SFI.EHZ. 2020-07-08T23:18:44.30 0.1 negative manual P 127 27.8499 147 -0.21 94
IV.RINC.HHZ. 2020-07-08T23:18:44.18 0.1 undecidable manual P 171 19.2696 157 0.18 97
IV.RONT.HHZ. 2020-07-08T23:18:43.64 0.1 undecidable manual P 237 13.0758 164 -0.1 99
IV.BRIS.HHZ. 2020-07-08T23:18:43.87 0.1 positive manual P 40 24.2535 151 -0.41 91
IV.VISG.HHZ. 2020-07-08T23:18:43.92 0.1 undecidable manual P 323 18.1707 158 -0.03 100
IV.LMD.HHZ. 2020-07-08T23:18:43.09 0.1 undecidable manual P 79 11.1777 166 -0.59 88
IV.SEI.HHZ. 2020-07-08T23:18:43.96 0.1 undecidable manual P 269 16.872 159 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.POPM.HHN. ML:2.1 0.00016840235000000002 0.1792 AML other m 2020-07-08T23:18:57.61
IV.RINC.HHN. ML:1.5 0.00006887907000000001 0.6016 AML other m 2020-07-08T23:18:51.40
IV.VISG.HHN. ML:1.6 0.00009548053000000001 0.32 AML other m 2020-07-08T23:18:51.60
IV.RINC.HHE. ML:1.6 0.00007918909 0.64 AML other m 2020-07-08T23:18:51.58
IV.ASQU.HHE. ML:2.0 0.00020950000000000002 0.58 AML other m 2020-07-08T23:18:52.96
IV.ASQU.HHN. ML:2.0 0.00017649999999999998 0.24 AML other m 2020-07-08T23:18:52.68
IV.SFI.EHN. ML:1.6 0.00007895 1.02 AML other m 2020-07-08T23:18:52.41
IV.MPPT.EHN. ML:1.4 0.00003945 1.58 AML other m 2020-07-08T23:18:53.13
IV.MPPT.EHE. ML:1.4 0.000038 0.56 AML other m 2020-07-08T23:18:53.29
IV.SFI.EHE. ML:1.6 0.00008035 0.86 AML other m 2020-07-08T23:18:53.93
IV.CRMI.HHE. ML:1.0 0.000013105865 0.256 AML other m 2020-07-08T23:18:55.48
IV.CRMI.HHN. ML:1.0 0.000016451065 0.3584 AML other m 2020-07-08T23:18:55.83
IV.CRE.HHN. ML:1.9 0.00011075 0.4 AML other m 2020-07-08T23:18:57.65
GU.POPM.HHE. ML:1.9 0.0001028 0.18 AML other m 2020-07-08T23:18:57.48
IV.CRE.HHE. ML:1.8 0.00008505000000000001 0.36 AML other m 2020-07-08T23:18:57.32
IV.VISG.HHE. ML:1.7 0.00011738754 0.3968 AML other m 2020-07-08T23:18:51.11
IV.RUFI.EHE. ML:1.1 0.000027437198 0.4352 AML other m 2020-07-08T23:18:52.19
IV.RUFI.EHN. ML:1.3 0.00003946993 1.5392 AML other m 2020-07-08T23:18:52.18
IV.LMD.HHE. ML:1.5 0.00008062249 0.192 AML other m 2020-07-08T23:18:51.56
IV.LMD.HHN. ML:1.4 0.000056472145 1.7056 AML other m 2020-07-08T23:18:51.00
IV.RONT.HHE. ML:1.5 0.00007463424000000001 0.256 AML other m 2020-07-08T23:18:56.08
IV.RONT.HHN. ML:1.5 0.00006829009999999999 0.2304 AML other m 2020-07-08T23:18:56.46
IV.BRIS.HHE. ML:2.1 0.0002809325 0.4096 AML other m 2020-07-08T23:18:51.47
IV.BRIS.HHN. ML:2.0 0.00020099965 0.2944 AML other m 2020-07-08T23:18:51.44
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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