Earthquake with magnitude of ML 1.4 on date 09-08-2018 and time 15:57:21 (Italy) in region 4 km W Tredozio (FC)

A magnitude ML 1.4 earthquake occured in region: 4 km W Tredozio (FC), on

  • 09-08-2018 13:57:21 (UTC)
  • 09-08-2018 15:57:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.09, 11.7 at 23 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
Tredozio FC 4 1212 1212
Marradi FI 7 3139 4351
Portico e San Benedetto FC 10 756 5107
Modigliana FC 11 4560 9667
Rocca San Casciano FC 12 1910 11577
Palazzuolo sul Senio FI 12 1154 12731
Premilcuore FC 14 799 13530
Dovadola FC 16 1653 15183
Brisighella RA 16 7639 22822
Casola Valsenio RA 16 2617 25439
San Godenzo FI 19 1167 26606
Galeata FC 20 2516 29122

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Faenza (58541 inhabitants)
30 Km S of Imola (69797 inhabitants)
31 Km W of Forlì (117913 inhabitants)
44 Km W of Cesena (96758 inhabitants)
50 Km NE of Firenze (382808 inhabitants)
53 Km E of Prato (191150 inhabitants)
53 Km SE of Bologna (386663 inhabitants)
54 Km SW of Ravenna (159116 inhabitants)
55 Km NE of Scandicci (50609 inhabitants)
65 Km E of Pistoia (90315 inhabitants)
69 Km W of Rimini (147750 inhabitants)
71 Km N of Arezzo (99543 inhabitants)
84 Km S of Ferrara (133155 inhabitants)
87 Km SE of Modena (184973 inhabitants)
90 Km NE of Siena (53903 inhabitants)
99 Km W of Pesaro (94582 inhabitants)
99 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
Rev 1000 ML 1.4 2018-08-09
13:57:21
44.09 11.7 23 2019-04-24
14:50:54
Bollettino Sismico Italiano INGV 60417701
Rev 100 ML 1.6 2018-08-09
13:57:20
44.12 11.7 22 2018-08-09
14:05:52
Sala Sismica INGV-Roma 59555061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-09 13:57:21 ± 0.2
Latitude 44.09 ± 0.01
Longitude 11.70 ± 0.01
Depth (km) 23 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 60417701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1252
Semi-minor axis of confidence ellipse (meter) 362
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 44
Circular confidence region, given by single value of horizontal uncertainty (meter) 1250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.01259
Epicentral distance of station farthest from the epicenter (degree) 0.59355
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 60417701
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-08-31 10:21:49

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 59555061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-09 14:05:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PARC.HHZ. 2018-08-09T13:57:42.03 0.3 undecidable manual S 138 0.5864 103 0.66 60
IV.IMOL.HNE. 2018-08-09T13:57:34.25 0.3 undecidable manual S 7 0.2734 120 1.61 38
IV.RUFI.EHZ. 2018-08-09T13:57:33.29 0.3 undecidable manual S 209 0.2842 119 0.38 70
IV.ASQU.HHZ. 2018-08-09T13:57:33.87 0.3 undecidable manual S 167 0.2977 117 0.59 66
IV.CRMI.HHZ. 2018-08-09T13:57:32.87 0.1 undecidable manual P 241 0.5936 102 -0.08 93
IV.SEI.HHZ. 2018-08-09T13:57:32.37 0.3 undecidable manual S 262 0.2464 123 0.43 69
IV.PARC.HHZ. 2018-08-09T13:57:32.31 0.3 undecidable manual P 138 0.5864 103 -0.53 63
IV.MTCR.EHZ. 2018-08-09T13:57:31.50 0.3 undecidable manual P 263 0.5027 105 0.05 71
IV.SFI.EHZ. 2018-08-09T13:57:31.40 0.1 undecidable manual S 150 0.2122 128 0.28 97
IV.MPPT.EHN. 2018-08-09T13:57:30.55 0.3 undecidable manual P 254 0.456 107 -0.12 71
IV.FNVD.HHZ. 2018-08-09T13:57:30.11 0.1 undecidable manual P 281 0.42 109 0.02 97
IV.MOCL.EHZ. 2018-08-09T13:57:29.59 0.3 undecidable manual P 258 0.3804 111 0.14 71
IV.ASQU.HHZ. 2018-08-09T13:57:28.02 0.1 undecidable manual P 167 0.2977 117 -0.14 97
IV.SEI.HHZ. 2018-08-09T13:57:27.17 0.1 undecidable manual P 262 0.2464 123 -0.22 97
IV.LMD.HHZ. 2018-08-09T13:57:27.95 0.1 undecidable manual S 147 0.0126 176 -0.24 100
IV.IMOL.HNE. 2018-08-09T13:57:27.64 0.1 undecidable manual P 7 0.2734 120 -0.15 98
IV.RUFI.EHZ. 2018-08-09T13:57:27.78 0.1 undecidable manual P 209 0.2842 119 -0.17 97
IV.SFI.EHZ. 2018-08-09T13:57:26.53 0.1 undecidable manual P 150 0.2122 128 -0.39 93
IV.LMD.HHZ. 2018-08-09T13:57:24.53 0.1 undecidable manual P 147 0.0126 176 -0.69 88
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PARC.HHN. ML:1.1 1.82E-5 1.44 AML other m 2018-08-09T13:57:45.03
IV.LMD.HHN. ML:1.9 0.000569 0.6 AML other m 2018-08-09T13:57:28.36
IV.SEI.HHN. ML:1.8 0.0002445 0.48 AML other m 2018-08-09T13:57:33.09
IV.SEI.HHE. ML:1.6 0.0001575 0.38 AML other m 2018-08-09T13:57:33.45
IV.ASQU.HHE. ML:1.3 7.675E-5 0.32 AML other m 2018-08-09T13:57:34.17
IV.ASQU.HHN. ML:1.2 5.325E-5 0.8 AML other m 2018-08-09T13:57:34.44
IV.PARC.HHE. ML:0.9 1.35E-5 0.8 AML other m 2018-08-09T13:57:47.58
IV.SFI.EHN. ML:1.6 0.00018418585 0.2368 AML other m 2018-08-09T13:57:32.10
IV.SFI.HNE. ML:1.7 0.00022516795 0.2432 AML other m 2018-08-09T13:57:32.40
IV.SFI.EHE. ML:1.6 0.0001900502 0.2368 AML other m 2018-08-09T13:57:32.40
IV.SFI.HNN. ML:1.7 0.00021181195 0.2624 AML other m 2018-08-09T13:57:31.97
IV.RUFI.EHE. ML:1 3.762813E-5 0.3008 AML other m 2018-08-09T13:57:33.66
IV.RUFI.EHN. ML:1.2 5.5141955E-5 0.2816 AML other m 2018-08-09T13:57:33.90
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download