Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 28-08-2017 and time 14:15:41 (Italy) in region 1 km E San Lorenzo Nuovo (VT)

A magnitude ML 1.5 earthquake occured in region: 1 km E San Lorenzo Nuovo (VT), on

  • 28-08-2017 12:15:41 (UTC)
  • 28-08-2017 14:15:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6860, 11.9200 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
San Lorenzo Nuovo VT 1 2091 2091
Grotte di Castro VT 4 2683 4774
Castel Giorgio TR 6 2131 6905
Gradoli VT 7 1353 8258
Bolsena VT 7 3991 12249
Acquapendente VT 8 5506 17755
Onano VT 9 995 18750
Latera VT 10 836 19586
Castel Viscardo TR 10 2938 22524
Proceno VT 11 557 23081
Allerona TR 15 1794 24875
Porano TR 15 1966 26841
Capodimonte VT 15 1731 28572
Valentano VT 15 2868 31440
Orvieto TR 16 20630 52070
Bagnoregio VT 16 3650 55720
Lubriano VT 16 909 56629
Marta VT 17 3499 60128
Sorano GR 17 3428 63556
Montefiascone VT 19 13432 76988
Piansano VT 20 2079 79067

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NW of Viterbo (67173 inhabitants)
61 Km SW of Perugia (166134 inhabitants)
61 Km W of Terni (111501 inhabitants)
66 Km E of Grosseto (82087 inhabitants)
67 Km N of Civitavecchia (52991 inhabitants)
71 Km W of Foligno (57155 inhabitants)
85 Km SE of Siena (53903 inhabitants)
87 Km S of Arezzo (99543 inhabitants)
100 Km NW of Roma (2864731 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 1.5 2017-08-28
12:15:41		 42.6855 11.9195 10 2018-07-06
15:40:33		 Bollettino Sismico Italiano INGV 50213281
Reviewed
Rev100 		ML 1.5 2017-08-28
12:15:41		 42.6763 11.9267 11 2017-08-28
12:27:19		 Sala Sismica INGV-Roma 49451831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-08-28 12:15:41 ± 0.07
Latitude 42.6855 ± 0.0045
Longitude 11.9195 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 50213281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 419
Semi-minor axis of confidence ellipse (meter) 399
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 198
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.11152
Epicentral distance of station farthest from the epicenter (degree) 0.64391
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 49451831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-08-28 12:27:19

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 50213281
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-09-18 09:26:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2017-08-28T12:16:03.20 0.6 undecidable manual S 3 71.4729 50 -0.18 45
IV.MOMA.HNZ. 2017-08-28T12:15:58.80 0.6 undecidable manual S 76 54.6009 50 -0.06 47
IV.CAFI.HHZ. 2017-08-28T12:15:54.38 0.6 undecidable manual P 3 71.4729 50 0.18 45
IV.TOLF.HHN. 2017-08-28T12:15:54.12 1.0 undecidable manual P 174 69.2751 50 0.27 22
IV.SRES.HHN. 2017-08-28T12:15:53.71 0.6 undecidable manual P 136 69.375 50 -0.15 45
IV.MGAB.HHZ. 2017-08-28T12:15:52.40 0.6 undecidable manual S 32 29.6481 50 0.19 48
IV.MOMA.HNZ. 2017-08-28T12:15:52.30 0.6 undecidable manual P 76 54.6009 50 0.71 40
TV.SF13.HHZ. 2017-08-28T12:15:51.80 0.6 undecidable manual S 301 28.5492 50 -0.11 49
TV.SF14.HHN. 2017-08-28T12:15:51.20 0.6 undecidable manual S 287 26.0517 50 -0.04 50
TV.SF04.EHZ. 2017-08-28T12:15:51.60 0.6 undecidable manual S 308 26.8509 50 0.13 49
TV.SF03.EHE. 2017-08-28T12:15:50.30 0.6 undecidable manual S 304 23.0547 114 -0.12 50
IV.SACS.HHZ. 2017-08-28T12:15:49.00 0.6 undecidable manual S 357 18.1707 119 0.11 50
TV.SF01.EHN. 2017-08-28T12:15:48.43 1.0 undecidable manual P 296 32.2455 50 0.29 24
TV.SF04.EHZ. 2017-08-28T12:15:47.57 1.0 undecidable manual P 308 26.8509 50 0.25 24
IV.MGAB.HHZ. 2017-08-28T12:15:47.32 0.1 undecidable manual P 32 29.6481 50 -0.43 92
IV.LATE.HHZ. 2017-08-28T12:15:47.30 0.6 undecidable manual S 230 12.3765 130 0.08 51
TV.SF14.HHN. 2017-08-28T12:15:47.11 0.3 undecidable manual P 287 26.0517 50 -0.08 75
TV.SF11.HHZ. 2017-08-28T12:15:47.47 0.6 undecidable manual P 316 28.2495 50 -0.06 50
TV.SF13.HHZ. 2017-08-28T12:15:47.61 0.1 undecidable manual P 301 28.5492 50 0.03 100
TV.SF03.EHE. 2017-08-28T12:15:46.77 0.6 undecidable manual P 304 23.0547 114 0.06 50
IV.MCIV.HHN. 2017-08-28T12:15:46.90 0.6 undecidable manual P 298 22.3554 115 0.32 48
IV.SACS.HHZ. 2017-08-28T12:15:45.64 1.0 undecidable manual P 357 18.1707 119 -0.19 25
IV.LATE.HHZ. 2017-08-28T12:15:44.69 0.1 undecidable manual P 230 12.3765 130 -0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAFI.HHE. ML:1.1 0.00002105 0.18 AML other m 2017-08-28T12:16:06.93
IV.CAFI.HHN. ML:1.0 0.00001695 0.18 AML other m 2017-08-28T12:16:05.16
IV.MGAB.HNE. ML:1.5 0.0001665 0.24 AML other m 2017-08-28T12:15:53.33
IV.MGAB.HHN. ML:1.6 0.00017749999999999998 1.44 AML other m 2017-08-28T12:15:53.06
IV.MGAB.HNN. ML:1.6 0.0001835 1.46 AML other m 2017-08-28T12:15:53.06
IV.MGAB.HHE. ML:1.6 0.0002075 0.24 AML other m 2017-08-28T12:15:53.33
IV.SACS.HNN. ML:1.4 0.0001835 1.1 AML other m 2017-08-28T12:15:49.23
IV.SACS.HHN. ML:1.3 0.00016949999999999997 0.48 AML other m 2017-08-28T12:15:49.54
IV.SACS.HNE. ML:1.5 0.0002665 0.68 AML other m 2017-08-28T12:15:49.36
IV.SACS.HHE. ML:1.5 0.000279 0.68 AML other m 2017-08-28T12:15:49.36
TV.SF04.EHN. ML:1.6 0.00021050000000000002 0.52 AML other m 2017-08-28T12:15:53.29
TV.SF04.EHE. ML:1.6 0.0002235 0.18 AML other m 2017-08-28T12:15:53.59
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