Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 27-03-2018 and time 07:47:40 (Italy) in region 6 km E Tuscania (VT)

A magnitude ML 1.8 earthquake occured in region: 6 km E Tuscania (VT), on

  • 27-03-2018 05:47:40 (UTC)
  • 27-03-2018 07:47:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4410, 11.9430 at 10 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.

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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
Tuscania VT 6 8451 8451
Arlena di Castro VT 10 854 9305
Marta VT 11 3499 12804
Capodimonte VT 12 1731 14535
Piansano VT 13 2079 16614
Montefiascone VT 13 13432 30046
Tessennano VT 13 345 30391
Viterbo VT 14 67173 97564
Canino VT 16 5286 102850
Vetralla VT 16 14037 116887
Cellere VT 16 1188 118075
Valentano VT 18 2868 120943
Ischia di Castro VT 19 2326 123269
Vitorchiano VT 19 5233 128502
Monte Romano VT 20 2054 130556
Blera VT 20 3344 133900
Villa San Giovanni in Tuscia VT 20 1331 135231

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Viterbo (67173 inhabitants)
41 Km NE of Civitavecchia (52991 inhabitants)
59 Km W of Terni (111501 inhabitants)
76 Km NW of Roma (2864731 inhabitants)
77 Km E of Grosseto (82087 inhabitants)
78 Km NW of Fiumicino (78395 inhabitants)
81 Km NW of Guidonia Montecelio (88673 inhabitants)
83 Km SW of Perugia (166134 inhabitants)
85 Km SW of Foligno (57155 inhabitants)
88 Km NW of Tivoli (56533 inhabitants)
97 Km NW of Pomezia (62966 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 1.8 2018-03-27
05:47:40		 42.4412 11.9432 10 2019-04-24
14:49:42		 Bollettino Sismico Italiano INGV 59439891
Reviewed
Rev100 		ML 1.8 2018-03-27
05:47:40		 42.4413 11.9407 10 2018-03-27
06:15:42		 Sala Sismica INGV-Roma 54871661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-03-27 05:47:40 ± 0.18
Latitude 42.4412 ± 0.0081
Longitude 11.9432 ± 0.0134
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 59439891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1227
Semi-minor axis of confidence ellipse (meter) 325
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 54
Circular confidence region, given by single value of horizontal uncertainty (meter) 1230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.20055
Epicentral distance of station farthest from the epicenter (degree) 0.62143
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 54871661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-03-27 06:15:42

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 59439891
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-02-18 17:29:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SRES.HHN. 2018-03-27T05:47:57.35 0.6 undecidable manual S 116 51.7038 50 0.15 48
IV.MCIV.HHZ. 2018-03-27T05:47:55.13 0.6 undecidable manual S 330 43.3233 50 0.18 48
TV.SF03.EHZ. 2018-03-27T05:47:55.54 0.6 undecidable manual S 332 45.3213 50 0.06 50
IV.TOLF.HHZ. 2018-03-27T05:47:54.40 0.6 undecidable manual S 174 42.1245 50 -0.23 48
TV.SF14.HHZ. 2018-03-27T05:47:54.44 0.6 undecidable manual S 323 43.9227 50 -0.69 42
IV.MAON.HHZ. 2018-03-27T05:47:53.44 0.1 positive manual P 269 66.4779 50 0.91 73
IV.ARRO.EHZ. 2018-03-27T05:47:53.54 1.0 undecidable manual P 77 68.9754 50 0.63 21
IV.MOMA.HHZ. 2018-03-27T05:47:52.58 0.3 undecidable manual P 52 65.0904 50 0.27 69
IV.ARCI.HHZ. 2018-03-27T05:47:51.84 0.1 negative manual P 320 59.3961 50 0.4 90
IV.MGAB.HHZ. 2018-03-27T05:47:50.32 0.3 undecidable manual P 15 54.1014 50 -0.29 70
TV.SF01.EHZ. 2018-03-27T05:47:50.34 0.3 undecidable manual P 323 51.5151 50 0.12 72
IV.CESX.HHE. 2018-03-27T05:47:50.85 1.0 undecidable manual P 70 55.7997 50 -0.03 24
IV.SRES.HHN. 2018-03-27T05:47:50.80 1.0 undecidable manual P 116 51.7038 50 0.55 22
TV.SF13.HHZ. 2018-03-27T05:47:49.90 0.6 undecidable manual P 328 49.5171 50 0 50
TV.SF03.EHZ. 2018-03-27T05:47:49.01 0.3 undecidable manual P 332 45.3213 50 -0.25 71
IV.LATE.HHZ. 2018-03-27T05:47:49.44 0.6 undecidable manual S 329 22.2555 115 0.18 50
TV.SF04.EHZ. 2018-03-27T05:47:49.97 0.3 undecidable manual P 332 49.5171 50 0.07 74
TV.SF14.HHZ. 2018-03-27T05:47:48.57 0.1 undecidable manual P 323 43.9227 50 -0.48 91
IV.MCIV.HHZ. 2018-03-27T05:47:48.92 0.3 undecidable manual P 330 43.3233 50 -0.03 75
IV.TOLF.HHZ. 2018-03-27T05:47:48.32 0.1 positive manual P 174 42.1245 50 -0.45 92
IV.LATE.HHZ. 2018-03-27T05:47:45.46 0.1 positive manual P 329 22.2555 115 -0.21 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LATE.HHE. ML:2.3 0.0013599999999999999 0.32 AML other m 2018-03-27T05:47:50.71
IV.LATE.HHN. ML:2.6 0.00275 1.58 AML other m 2018-03-27T05:47:54.16
IV.MCIV.HHE. ML:1.7 0.000161 0.26 AML other m 2018-03-27T05:47:55.57
IV.MCIV.HHN. ML:1.6 0.000118 1.48 AML other m 2018-03-27T05:47:56.93
TV.SF04.EHN. ML:1.9 0.0002125 0.22 AML other m 2018-03-27T05:47:57.75
TV.SF01.EHE. ML:1.7 0.00013450000000000002 0.78 AML other m 2018-03-27T05:47:58.04
TV.SF01.EHN. ML:1.8 0.00015415 0.94 AML other m 2018-03-27T05:48:00.05
TV.SF04.EHE. ML:1.7 0.000134 1.44 AML other m 2018-03-27T05:48:00.77
IV.MGAB.HHN. ML:1.6 0.00009759999999999999 0.26 AML other m 2018-03-27T05:48:01.56
IV.MGAB.HNN. ML:1.6 0.0000977 0.24 AML other m 2018-03-27T05:48:01.44
IV.MGAB.HHE. ML:1.7 0.00011949999999999999 0.24 AML other m 2018-03-27T05:48:01.78
IV.MGAB.HNE. ML:1.7 0.0001171 0.26 AML other m 2018-03-27T05:48:01.79
IV.MOMA.HHN. ML:1.6 0.0000783 0.54 AML other m 2018-03-27T05:48:03.54
IV.MOMA.HHE. ML:1.7 0.0000829 0.2 AML other m 2018-03-27T05:48:04.15
IV.MAON.HHN. ML:1.6 0.000073 0.74 AML other m 2018-03-27T05:48:04.51
IV.MAON.HHE. ML:1.9 0.0001475 0.34 AML other m 2018-03-27T05:48:04.63
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