Earthquake with magnitude of ML 2.0 on date 13-09-2018 and time 03:03:40 (UTC) in region 6 km NW Onano (VT)

A magnitude ML 2.0 earthquake occured in region: 6 km NW Onano (VT), on

  • 13-09-2018 03:03:40 (UTC)
  • 13-09-2018 05:03:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.73, 11.77 at 7 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
Onano VT 6 995 995
Proceno VT 6 557 1552
Sorano GR 7 3428 4980
Castell'Azzara GR 7 1476 6456
Acquapendente VT 8 5506 11962
Grotte di Castro VT 11 2683 14645
Gradoli VT 12 1353 15998
San Lorenzo Nuovo VT 12 2091 18089
Latera VT 13 836 18925
Pitigliano GR 13 3818 22743
Piancastagnaio SI 15 4230 26973
Castel Giorgio TR 18 2131 29104
San Casciano dei Bagni SI 18 1632 30736
Abbadia San Salvatore SI 18 6444 37180
Radicofani SI 18 1097 38277
Valentano VT 19 2868 41145
Santa Fiora GR 19 2622 43767
Semproniano GR 19 1059 44826
Allerona TR 19 1794 46620
Castel Viscardo TR 19 2938 49558

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km NW of Viterbo (67173 inhabitants)
54 Km E of Grosseto (82087 inhabitants)
66 Km SW of Perugia (166134 inhabitants)
71 Km N of Civitavecchia (52991 inhabitants)
74 Km SE of Siena (53903 inhabitants)
74 Km W of Terni (111501 inhabitants)
80 Km W of Foligno (57155 inhabitants)
82 Km S of Arezzo (99543 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours) *

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985 *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire *

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 ML 2.0 2018-09-13
03:03:40
42.73 11.77 7 2019-06-04
09:15:53
Bollettino Sismico Italiano INGV 60931141
Rev 100 ML 2.0 2018-09-13
03:03:40
42.73 11.75 7 2018-09-13
03:09:02
Sala Sismica INGV-Roma 60889121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-13 03:03:40 ± 0.06
Latitude 42.73 ± 0.00
Longitude 11.77 ± 0.00
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 60931141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 419
Semi-minor axis of confidence ellipse (meter) 300
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 26
Circular confidence region, given by single value of horizontal uncertainty (meter) 420
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
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) 0.08184
Epicentral distance of station farthest from the epicenter (degree) 0.81838
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 60889121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-13 03:09:02

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 60931141
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-05-03 16:32:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARRO.EHZ. 2018-09-13T03:03:56.04 0.3 undecidable manual P 102 0.7482 50 0.56 58
IV.ATCC.EHE. 2018-09-13T03:03:56.10 0.3 undecidable manual P 54 0.7815 50 0.06 65
IV.CSNT.HHZ. 2018-09-13T03:03:56.60 0.3 undecidable manual P 335 0.8184 50 -0.07 64
IV.MURB.HHE. 2018-09-13T03:03:55.85 0.3 undecidable manual P 46 0.7653 50 0.08 65
IV.SRES.HHN. 2018-09-13T03:03:55.83 0.6 undecidable manual P 132 0.7374 50 0.54 39
IV.TOLF.HHE. 2018-09-13T03:03:54.30 0.3 undecidable manual P 166 0.6898 50 -0.18 65
IV.ATVA.EHE. 2018-09-13T03:03:53.25 0.3 undecidable manual P 35 0.6628 50 -0.77 54
IV.ATTE.HHN. 2018-09-13T03:03:53.08 0.3 undecidable manual P 42 0.6313 50 -0.4 62
IV.RIBO.EHZ. 2018-09-13T03:03:52.72 0.3 undecidable manual P 292 0.572 50 0.26 65
IV.MAON.HHZ. 2018-09-13T03:03:52.10 0.3 undecidable manual P 237 0.5594 50 -0.15 67
IV.ARCI.HHZ. 2018-09-13T03:03:50.40 0.6 undecidable manual S 299 0.2455 105 -0.14 47
TV.SF01.EHZ. 2018-09-13T03:03:47.77 0.6 undecidable manual S 298 0.17 111 0.01 49
IV.SACS.HHZ. 2018-09-13T03:03:47.08 0.3 undecidable manual S 42 0.1556 112 -0.15 72
TV.SF13.HHE. 2018-09-13T03:03:46.66 0.3 undecidable manual S 308 0.1385 115 0.01 75
TV.SF11.HHE. 2018-09-13T03:03:46.81 0.3 undecidable manual S 334 0.1511 113 -0.25 71
TV.SF04.EHZ. 2018-09-13T03:03:46.51 0.3 undecidable manual S 322 0.1295 116 0.18 72
IV.ARCI.HHZ. 2018-09-13T03:03:46.40 0.1 negative manual P 299 0.2455 105 0 98
TV.SF14.HHE. 2018-09-13T03:03:45.31 0.3 undecidable manual S 281 0.1151 119 -0.53 67
TV.SF03.EHN. 2018-09-13T03:03:45.19 0.3 undecidable manual S 319 0.0926 125 0.09 74
IV.LATE.HHZ. 2018-09-13T03:03:45.93 0.3 undecidable manual S 168 0.1223 118 -0.13 73
TV.SF01.EHZ. 2018-09-13T03:03:44.98 0.1 negative manual P 298 0.17 111 0.18 96
IV.SACS.HHZ. 2018-09-13T03:03:44.45 0.1 positive manual P 42 0.1556 112 -0.04 99
TV.SF13.HHE. 2018-09-13T03:03:44.34 0.1 negative manual P 308 0.1385 115 0.19 96
IV.MCIV.HHZ. 2018-09-13T03:03:44.77 0.3 undecidable manual S 304 0.0818 128 0.01 75
TV.SF11.HHE. 2018-09-13T03:03:44.55 0.1 negative manual P 334 0.1511 113 0.15 96
TV.SF04.EHZ. 2018-09-13T03:03:44.14 0.1 negative manual P 322 0.1295 116 0.17 97
IV.MCIV.HHZ. 2018-09-13T03:03:43.21 0.1 negative manual P 304 0.0818 128 0.15 98
TV.SF14.HHE. 2018-09-13T03:03:43.43 0.1 negative manual P 281 0.1151 119 -0.26 95
TV.SF03.EHN. 2018-09-13T03:03:43.44 0.1 negative manual P 319 0.0926 125 0.18 97
IV.LATE.HHZ. 2018-09-13T03:03:43.82 0.1 positive manual P 168 0.1223 118 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MURB.HHN. ML:2.4 0.000361 0.26 AML other m 2018-09-13T03:04:08.83
IV.MURB.HHE. ML:2.5 0.0003635 0.26 AML other m 2018-09-13T03:04:10.98
IV.MCIV.HHN. ML:1.9 0.001211155 0.24 AML other m 2018-09-13T03:03:48.00
IV.MCIV.HHE. ML:2.1 0.0018978895 0.216 AML other m 2018-09-13T03:03:45.77
IV.LATE.HHN. ML:2.8 0.008292022 0.16 AML other m 2018-09-13T03:03:47.26
IV.LATE.HHE. ML:2.6 0.0049588255 0.1408 AML other m 2018-09-13T03:03:46.56
TV.SF04.EHE. ML:2 0.001225363 0.0992 AML other m 2018-09-13T03:03:47.66
TV.SF04.EHN. ML:2.4 0.002643171 0.2592 AML other m 2018-09-13T03:03:47.16
IV.SACS.HNN. ML:1.7 0.0004163886 0.28 AML other m 2018-09-13T03:03:48.37
IV.SACS.HHN. ML:1.6 0.0003887153 0.1392 AML other m 2018-09-13T03:03:49.76
IV.SACS.HHE. ML:1.8 0.00059765975 0.2208 AML other m 2018-09-13T03:03:48.11
IV.SACS.HNE. ML:1.8 0.0005550058 0.1392 AML other m 2018-09-13T03:03:48.04
TV.SF01.EHN. ML:2 0.00087682145 0.2 AML other m 2018-09-13T03:03:48.63
TV.SF01.EHE. ML:2.1 0.001148396 0.5184 AML other m 2018-09-13T03:03:50.85
IV.ARCI.HHN. ML:2 0.0005356499 0.5008 AML other m 2018-09-13T03:03:51.86
IV.ARCI.HHE. ML:1.8 0.00034299805 0.28 AML other m 2018-09-13T03:03:51.93
IV.MAON.HHN. ML:1.7 9.687707E-5 0.32 AML other m 2018-09-13T03:04:03.35
IV.MAON.HHE. ML:1.5 6.0441305E-5 0.3792 AML other m 2018-09-13T03:04:03.92
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in full SEED format Download