Earthquake with magnitude of ML 1.1 on date 22-05-2018 and time 20:18:59 (Italy) in region 4 km SW Tredozio (FC)

A magnitude ML 1.1 earthquake occured in region: 4 km SW Tredozio (FC), on

  • 22-05-2018 18:18:59 (UTC)
  • 22-05-2018 20:18:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.06, 11.7 at 2 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 5 1212 1212
Marradi FI 7 3139 4351
Portico e San Benedetto FC 7 756 5107
Premilcuore FC 11 799 5906
Rocca San Casciano FC 12 1910 7816
Modigliana FC 14 4560 12376
Palazzuolo sul Senio FI 14 1154 13530
San Godenzo FI 16 1167 14697
Dovadola FC 17 1653 16350
Galeata FC 18 2516 18866
Brisighella RA 19 7639 26505
Casola Valsenio RA 20 2617 29122
Civitella di Romagna FC 20 3786 32908

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Faenza (58541 inhabitants)
33 Km SW of Forlì (117913 inhabitants)
33 Km S of Imola (69797 inhabitants)
44 Km W of Cesena (96758 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
52 Km E of Prato (191150 inhabitants)
53 Km NE of Scandicci (50609 inhabitants)
57 Km SE of Bologna (386663 inhabitants)
57 Km SW of Ravenna (159116 inhabitants)
64 Km E of Pistoia (90315 inhabitants)
67 Km N of Arezzo (99543 inhabitants)
69 Km W of Rimini (147750 inhabitants)
87 Km S of Ferrara (133155 inhabitants)
87 Km NE of Siena (53903 inhabitants)
90 Km SE of Modena (184973 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 1.1 2018-05-22
18:18:59
44.06 11.7 2 2019-04-24
14:51:13
Bollettino Sismico Italiano INGV 66714951
Rev 100 ML 1.1 2018-05-22
18:18:59
44.06 11.71 1 2018-05-22
18:28:49
Sala Sismica INGV-Roma 57136001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-22 18:18:59 ± 0.14
Latitude 44.06 ± 0.00
Longitude 11.70 ± 0.01
Depth (km) 2 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 66714951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 698
Semi-minor axis of confidence ellipse (meter) 355
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 280
Circular confidence region, given by single value of horizontal uncertainty (meter) 700
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.02158
Epicentral distance of station farthest from the epicenter (degree) 0.42898
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 66714951
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-03-20 12:37:19

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 57136001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-22 18:28:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MOCL.EHE. 2018-05-22T18:19:13.75 0.6 undecidable manual S 262 0.3768 93 -0.21 46
IV.RUFI.EHZ. 2018-05-22T18:19:09.99 0.3 undecidable manual S 212 0.2572 94 0.6 64
IV.FNVD.HHE. 2018-05-22T18:19:09.03 0.6 undecidable manual P 285 0.429 92 0.04 47
IV.ASQU.HHZ. 2018-05-22T18:19:09.88 0.6 undecidable manual S 166 0.2671 94 0.12 48
IV.MOCL.EHE. 2018-05-22T18:19:07.89 0.6 undecidable manual P 262 0.3768 93 0.06 47
IV.SFI.EHZ. 2018-05-22T18:19:07.04 0.6 undecidable manual S 145 0.1844 96 0.44 45
IV.BRIS.HHZ. 2018-05-22T18:19:06.70 0.3 undecidable manual S 16 0.1745 96 0.49 68
IV.RUFI.EHZ. 2018-05-22T18:19:05.00 0.1 undecidable manual P 212 0.2572 94 -0.19 95
IV.ASQU.HHZ. 2018-05-22T18:19:05.03 0.1 undecidable manual P 166 0.2671 94 -0.37 91
IV.BRIS.HHZ. 2018-05-22T18:19:03.20 0.1 undecidable manual P 16 0.1745 96 -0.15 97
IV.SFI.EHZ. 2018-05-22T18:19:03.41 0.1 undecidable manual P 145 0.1844 96 -0.17 96
IV.LMD.HHZ. 2018-05-22T18:19:00.55 0.3 undecidable manual S 14 0.0216 130 0.01 77
IV.LMD.HHZ. 2018-05-22T18:18:59.94 0.1 undecidable manual P 14 0.0216 130 -0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:0 0.005093988 0.064 AML other m 2018-05-22T18:19:00.59
IV.LMD.HHN. ML:0 0.0073802905 0.128 AML other m 2018-05-22T18:19:00.65
IV.BRIS.HNN. ML:1.4 0.000198007595 0.6144 AML other m 2018-05-22T18:19:06.91
IV.BRIS.HNE. ML:1.3 0.000191150055 0.2816 AML other m 2018-05-22T18:19:06.96
IV.SFI.HNE. ML:1.1 9.298821E-5 0.32 AML other m 2018-05-22T18:19:07.28
IV.BRIS.HHN. ML:1.3 0.0001695568 0.4608 AML other m 2018-05-22T18:19:07.08
IV.SFI.EHE. ML:1 7.987328E-5 0.1408 AML other m 2018-05-22T18:19:07.60
IV.SFI.EHN. ML:1.2 0.00012814525 0.1408 AML other m 2018-05-22T18:19:07.62
IV.SFI.HNN. ML:1.2 0.0001409625205 0.1536 AML other m 2018-05-22T18:19:07.61
IV.RUFI.EHN. ML:0.9 4.6445685E-5 0.2432 AML other m 2018-05-22T18:19:10.10
IV.RUFI.EHE. ML:0.6 1.8887875E-5 0.2048 AML other m 2018-05-22T18:19:10.37
IV.ASQU.HHE. ML:1.3 0.000108290585 0.1408 AML other m 2018-05-22T18:19:10.21
IV.ASQU.HHN. ML:1 5.1069455E-5 0.1664 AML other m 2018-05-22T18:19:10.45
IV.BRIS.HHE. ML:1.2 0.00013079885 0.3968 AML other m 2018-05-22T18:19:10.60
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