INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.5 on date 07-08-2018 and time 00:32:24 (Italy) in region 6 km NW San Venanzo (TR)

A magnitude ML 1.5 earthquake occured in region: 6 km NW San Venanzo (TR), on

  • 06-08-2018 22:32:24 (UTC)
  • 07-08-2018 00:32:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9, 12.21 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
San Venanzo TR 6 2218 2218
Parrano TR 9 534 2752
Montegabbione TR 10 1216 3968
Marsciano PG 11 18902 22870
Monteleone d'Orvieto TR 13 1467 24337
Piegaro PG 13 3669 28006
Ficulle TR 13 1669 29675
Monte Castello di Vibio PG 13 1567 31242
Fratta Todina PG 14 1839 33081
Fabro TR 16 2876 35957
Panicale PG 17 5692 41649
Città della Pieve PG 18 7712 49361
Paciano PG 18 975 50336
Collazzone PG 19 3473 53809

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SW of Perugia (166134 inhabitants)
41 Km W of Foligno (57155 inhabitants)
52 Km NW of Terni (111501 inhabitants)
54 Km N of Viterbo (67173 inhabitants)
69 Km SE of Arezzo (99543 inhabitants)
85 Km SE of Siena (53903 inhabitants)
90 Km E of Grosseto (82087 inhabitants)
95 Km NE of Civitavecchia (52991 inhabitants)
Recent and historical Seismicity
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 100 ML 1.5 2018-08-06
22:32:24
42.89 12.21 8 2018-08-06
22:44:10
Sala Sismica INGV-Roma 59460521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-06 22:32:24 ± 0.1
Latitude 42.89 ± 0.01
Longitude 12.21 ± 0.00
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59460521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 623
Semi-minor axis of confidence ellipse (meter) 423
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 171
Circular confidence region, given by single value of horizontal uncertainty (meter) 620
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 25
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
Epicentral distance of station farthest from the epicenter (degree) 0.80579
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 59460521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-06 22:44:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MBAL.EHZ. 2018-08-06T22:33:45.39 3.0 undecidable manual Sn -2.07 0
IV.VITU.HHZ. 2018-08-06T22:33:36.36 3.0 undecidable manual Sn 0.06 0
IV.SAMA.HHZ. 2018-08-06T22:32:57.95 3.0 undecidable manual S -5.81 0
IV.EL6.EHZ. 2018-08-06T22:32:52.09 3.0 undecidable manual S 0.06 0
IV.ATVO.HHZ. 2018-08-06T22:32:42.60 0.6 undecidable manual S 17 0.5081 50 0.25 45
IV.MURB.HHZ. 2018-08-06T22:32:41.10 0.6 undecidable manual S 32 0.4344 50 0.93 37
IV.EL6.EHZ. 2018-08-06T22:32:41.98 3.0 positive manual P 2.16 0
IV.CAFI.HHZ. 2018-08-06T22:32:41.26 0.6 undecidable manual S 338 0.4685 50 0.09 47
IV.ATCC.EHZ. 2018-08-06T22:32:40.32 0.6 undecidable manual S 47 0.429 50 0.32 46
IV.ATMI.HHZ. 2018-08-06T22:32:40.26 0.6 undecidable manual S 6 0.4416 50 -0.11 47
IV.ARVD.HHZ. 2018-08-06T22:32:39.48 0.3 positive manual P 41 0.8058 50 -0.31 63
IV.PARC.HHZ. 2018-08-06T22:32:39.35 0.6 undecidable manual P 2 0.7536 50 0.46 41
IV.LATE.HHZ. 2018-08-06T22:32:39.81 0.6 undecidable manual S 227 0.4083 50 0.43 45
TV.SF04.EHZ. 2018-08-06T22:32:38.66 0.6 undecidable manual S 262 0.4047 50 -0.63 42
IV.ASSB.HHZ. 2018-08-06T22:32:37.94 0.6 undecidable manual S 66 0.3615 50 -0.07 49
IV.ATTE.HHZ. 2018-08-06T22:32:36.28 0.6 undecidable manual S 19 0.3211 50 -0.52 44
IV.ATPI.EHZ. 2018-08-06T22:32:35.81 0.6 positive manual P 14 0.5729 50 0 47
IV.MOMA.HHZ. 2018-08-06T22:32:35.28 0.6 undecidable manual S 109 0.2806 105 -0.16 49
IV.ATVO.HHZ. 2018-08-06T22:32:34.66 0.6 positive manual P 17 0.5081 50 -0.04 48
IV.ATMI.HHZ. 2018-08-06T22:32:33.52 0.3 negative manual P 6 0.4416 50 -0.02 72
IV.LATE.HHZ. 2018-08-06T22:32:33.24 1.0 negative manual P 227 0.4083 50 0.26 23
IV.CAFI.HHZ. 2018-08-06T22:32:33.81 0.1 negative manual P 338 0.4685 50 -0.2 93
IV.ATCC.EHZ. 2018-08-06T22:32:33.32 0.6 positive manual P 47 0.429 50 -0.02 48
IV.SACS.HHZ. 2018-08-06T22:32:33.45 0.6 undecidable manual S 258 0.223 109 0.16 49
IV.MURB.HHZ. 2018-08-06T22:32:33.50 0.1 positive manual P 32 0.4344 50 0.06 96
TV.SF04.EHZ. 2018-08-06T22:32:32.67 1.0 undecidable manual P 262 0.4047 50 -0.25 23
IV.ASSB.HHZ. 2018-08-06T22:32:32.01 0.1 positive manual P 66 0.3615 50 -0.18 95
IV.ATTE.HHZ. 2018-08-06T22:32:31.16 1.0 positive manual P 19 0.3211 50 -0.34 23
IV.MOMA.HHZ. 2018-08-06T22:32:30.80 0.6 undecidable manual P 109 0.2806 105 0.09 49
IV.SACS.HHZ. 2018-08-06T22:32:29.53 0.1 positive manual P 258 0.223 109 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HNN. ML:1.5 0.0002055 0.28 AML other m 2018-08-06T22:32:33.78
IV.SACS.HHN. ML:1.6 0.000227 0.28 AML other m 2018-08-06T22:32:33.78
IV.SACS.HNE. ML:1.5 0.000204 1.14 AML other m 2018-08-06T22:32:34.21
IV.SACS.HHE. ML:1.5 0.0002075 0.4 AML other m 2018-08-06T22:32:34.21
IV.ATTE.HHE. ML:1.5 0.000125 0.26 AML other m 2018-08-06T22:32:36.71
IV.MOMA.HHE. ML:1.5 0.00014 0.54 AML other m 2018-08-06T22:32:37.48
IV.ATTE.HHN. ML:1.5 0.0001195 0.16 AML other m 2018-08-06T22:32:37.45
IV.MOMA.HHN. ML:1.4 0.000123 0.28 AML other m 2018-08-06T22:32:37.44
IV.ASSB.HHN. ML:1.2 5.565E-5 1.28 AML other m 2018-08-06T22:32:38.95
IV.ASSB.HHE. ML:1.2 5.815E-5 0.76 AML other m 2018-08-06T22:32:40.64
IV.CAFI.HHE. ML:1.1 3.06E-5 0.18 AML other m 2018-08-06T22:32:41.59
IV.LATE.HHE. ML:1.5 9.945E-5 0.24 AML other m 2018-08-06T22:32:42.25
IV.ATCC.EHE. ML:1.5 8.525E-5 0.54 AML other m 2018-08-06T22:32:42.48
IV.ATMI.HHN. ML:2 0.00024 0.24 AML other m 2018-08-06T22:32:42.83
IV.CAFI.HHN. ML:1 2.34E-5 0.88 AML other m 2018-08-06T22:32:43.20
IV.MURB.HHN. ML:2.1 0.0003705 0.34 AML other m 2018-08-06T22:32:43.25
IV.LATE.HHN. ML:1.7 0.00013575 1.06 AML other m 2018-08-06T22:32:43.94
IV.ATMI.HHE. ML:1.9 0.000206 1.82 AML other m 2018-08-06T22:32:44.96
IV.ATVO.HHE. ML:1.4 5.96E-5 1.02 AML other m 2018-08-06T22:32:46.25
IV.ATPI.EHE. ML:1.3 4.225E-5 0.36 AML other m 2018-08-06T22:32:46.52
IV.MURB.HHE. ML:2.1 0.0003425 0.28 AML other m 2018-08-06T22:32:46.41
IV.ATCC.EHN. ML:1.4 6.735E-5 1.46 AML other m 2018-08-06T22:32:46.77
IV.ATVO.HHN. ML:1.3 4.455E-5 1.4 AML other m 2018-08-06T22:32:47.92
IV.ATPI.EHN. ML:1.3 3.395E-5 0.3 AML other m 2018-08-06T22:32:50.31
IV.PARC.HHN. ML:1.3 2.415E-5 0.88 AML other m 2018-08-06T22:32:52.49
IV.PARC.HHE. ML:1.4 3.05E-5 0.64 AML other m 2018-08-06T22:32:52.87
IV.ARVD.HHN. ML:0.9 1.0295E-5 0.7 AML other m 2018-08-06T22:32:55.49
IV.ARVD.HHE. ML:0.9 1.195E-5 0.98 AML other m 2018-08-06T22:32:56.40
IV.VITU.HHE. ML:2.1 1.865E-5 1.16 AML other m 2018-08-06T22:33:41.17
IV.VITU.HHN. ML:2.2 2.36E-5 1.14 AML other m 2018-08-06T22:33:42.95
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