Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 27-06-2016 and time 20:23:30 (UTC) in region 2 km S Acquapendente (VT)

A magnitude ML 1.6 earthquake occured in region: 2 km S Acquapendente (VT), on

  • 27-06-2016 20:23:30 (UTC)
  • 27-06-2016 22:23:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7290, 11.8680 at 8 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
Acquapendente VT 2 5506 5506
Proceno VT 4 557 6063
San Lorenzo Nuovo VT 6 2091 8154
Onano VT 6 995 9149
Grotte di Castro VT 6 2683 11832
Gradoli VT 9 1353 13185
Castel Giorgio TR 10 2131 15316
Castel Viscardo TR 11 2938 18254
Latera VT 12 836 19090
Allerona TR 13 1794 20884
Sorano GR 14 3428 24312
Bolsena VT 14 3991 28303
Castell'Azzara GR 15 1476 29779
San Casciano dei Bagni SI 16 1632 31411
Valentano VT 18 2868 34279
Fabro TR 19 2876 37155
Pitigliano GR 19 3818 40973
Piancastagnaio SI 20 4230 45203
Porano TR 20 1966 47169
Orvieto TR 20 20630 67799

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of Viterbo (67173 inhabitants)
60 Km SW of Perugia (166134 inhabitants)
62 Km E of Grosseto (82087 inhabitants)
67 Km W of Terni (111501 inhabitants)
71 Km N of Civitavecchia (52991 inhabitants)
73 Km W of Foligno (57155 inhabitants)
79 Km SE of Siena (53903 inhabitants)
82 Km S of Arezzo (99543 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 2016-06-27
20:23:30		 42.7293 11.8677 9 2016-11-08
11:50:01		 Bollettino Sismico Italiano INGV 26469511
Reviewed
Rev100 		ML 1.6 2016-06-27
20:23:30		 42.7253 11.8625 10 2016-06-27
20:29:15		 Sala Sismica INGV-Roma 26132751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-06-27 20:23:30 ± 0.1
Latitude 42.7293 ± 0.0054
Longitude 11.8677 ± 0.0049
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 26469511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 498
Semi-minor axis of confidence ellipse (meter) 374
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 329
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.12321
Epicentral distance of station farthest from the epicenter (degree) 0.67179
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 26132751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-06-27 20:29:15

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 26469511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2016-10-11 12:49:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2016-06-27T20:23:52.28 0.6 undecidable manual S 7 66.9774 50 0.53 41
IV.ATMI.HHZ. 2016-06-27T20:23:44.36 0.6 undecidable manual P 26 74.5698 50 0.29 43
IV.TOLF.HHN. 2016-06-27T20:23:44.07 0.6 undecidable manual P 172 74.5698 50 -0.01 45
IV.CAFI.HHZ. 2016-06-27T20:23:42.79 0.1 undecidable manual P 7 66.9774 50 -0.12 90
IV.MGAB.HHZ. 2016-06-27T20:23:40.99 0.3 undecidable manual S 44 28.4493 107 -0.14 72
TV.SF01.EHZ. 2016-06-27T20:23:40.01 0.6 undecidable manual S 290 26.4513 108 -0.45 45
TV.SF04.EHZ. 2016-06-27T20:23:38.87 0.3 undecidable manual S 305 20.5683 112 0.32 70
IV.ARCI.HHZ. 2016-06-27T20:23:37.70 0.1 negative manual P 293 34.743 50 -0.23 93
IV.MCIV.HHZ. 2016-06-27T20:23:37.12 0.3 undecidable manual S 289 16.4724 117 -0.15 73
TV.SF03.EHN. 2016-06-27T20:23:37.29 0.3 undecidable manual S 299 16.872 117 -0.1 74
IV.MGAB.HHZ. 2016-06-27T20:23:36.35 0.1 positive manual P 44 28.4493 107 -0.42 90
IV.SACS.HHZ. 2016-06-27T20:23:36.62 0.3 undecidable manual S 14 13.6752 122 0.2 73
TV.SF01.EHZ. 2016-06-27T20:23:36.36 0.1 undecidable manual P 290 26.4513 108 -0.03 98
TV.SF04.EHZ. 2016-06-27T20:23:35.32 0.1 negative manual P 305 20.5683 112 0.03 99
IV.LATE.HHZ. 2016-06-27T20:23:34.31 0.1 positive manual P 202 13.875 121 0.23 96
IV.SACS.HHZ. 2016-06-27T20:23:34.15 0.1 positive manual P 14 13.6752 122 0.09 99
IV.MCIV.HHZ. 2016-06-27T20:23:34.57 0.1 negative manual P 289 16.4724 117 0.03 100
TV.SF03.EHN. 2016-06-27T20:23:34.75 0.1 negative manual P 299 16.872 117 0.13 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARCI.HHN. ML:1.3 0.00008765 0.8 AML other m 2016-06-27T20:23:43.43
IV.ARCI.HHE. ML:1.4 0.00010065000000000001 0.36 AML other m 2016-06-27T20:23:44.67
IV.CAFI.HHE. ML:1.6 0.00006445000000000001 0.2 AML other m 2016-06-27T20:23:53.01
IV.CAFI.HHN. ML:1.4 0.0000465 1.32 AML other m 2016-06-27T20:23:54.73
IV.MCIV.HHE. ML:1.6 0.00041349999999999997 0.46 AML other m 2016-06-27T20:23:37.84
IV.MCIV.HHN. ML:1.6 0.0003825 0.58 AML other m 2016-06-27T20:23:40.56
IV.MGAB.HHN. ML:1.7 0.0002455 0.14 AML other m 2016-06-27T20:23:42.29
IV.MGAB.HHE. ML:1.6 0.0001865 1.24 AML other m 2016-06-27T20:23:44.84
IV.SACS.HNE. ML:1.9 0.0008235 0.2 AML other m 2016-06-27T20:23:37.19
IV.SACS.HHE. ML:1.9 0.0008105 0.2 AML other m 2016-06-27T20:23:37.19
IV.SACS.HNN. ML:1.6 0.0004385 1.22 AML other m 2016-06-27T20:23:37.58
IV.SACS.HHN. ML:1.6 0.0004505 0.84 AML other m 2016-06-27T20:23:37.58
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