INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.0 on date 09-08-2018 and time 01:25:46 (Italy) in region 5 km E Ussita (MC)

A magnitude ML 1.0 earthquake occured in region: 5 km E Ussita (MC), on

  • 08-08-2018 23:25:46 (UTC)
  • 09-08-2018 01:25:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.93, 13.19 at 6 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
Ussita MC 5 444 444
Castelsantangelo sul Nera MC 5 281 725
Bolognola MC 8 142 867
Visso MC 8 1107 1974
Acquacanina MC 12 121 2095
Montemonaco AP 12 604 2699
Fiastra MC 12 559 3258
Montefortino FM 12 1178 4436
Preci PG 13 724 5160
Fiordimonte MC 15 202 5362
Amandola FM 15 3629 8991
Montegallo AP 15 523 9514
Sarnano MC 15 3264 12778
Norcia PG 17 4957 17735
Monte Cavallo MC 17 145 17880
Pievebovigliana MC 17 866 18746
Pieve Torina MC 17 1458 20204
Comunanza AP 19 3166 23370
Arquata del Tronto AP 19 1178 24548
Gualdo MC 20 815 25363

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
52 Km NW of Teramo (54892 inhabitants)
60 Km NE of Terni (111501 inhabitants)
66 Km N of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
91 Km NW of Montesilvano (53738 inhabitants)
98 Km NW of Pescara (121014 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 1.0 2018-08-08
23:25:46
42.93 13.19 6 2018-08-08
23:42:53
Sala Sismica INGV-Roma 59532491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-08 23:25:46 ± 0.22
Latitude 42.93 ± 0.01
Longitude 13.19 ± 0.01
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59532491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 912
Semi-minor axis of confidence ellipse (meter) 432
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 5
Circular confidence region, given by single value of horizontal uncertainty (meter) 910
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31566
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 59532491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-08 23:42:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSP9.EHZ. 2018-08-08T23:26:19.77 3.0 undecidable manual S -1.88 0
IV.LAV9.HNZ. 2018-08-08T23:26:09.24 3.0 undecidable manual P -0.86 0
IV.ARVD.HHZ. 2018-08-08T23:26:08.33 3.0 undecidable manual S -0.11 0
IV.EL6.EHZ. 2018-08-08T23:25:55.51 3.0 positive manual P 0.22 0
IV.MF5.EHZ. 2018-08-08T23:25:55.85 0.1 undecidable manual S 73 0.2059 105 0.72 81
IV.TERO.HHZ. 2018-08-08T23:25:55.48 3.0 undecidable manual P -0.09 0
IV.CESI.HHZ. 2018-08-08T23:25:55.85 0.1 undecidable manual S 290 0.223 104 0.07 96
IV.CING.HHZ. 2018-08-08T23:25:55.90 3.0 undecidable manual P -0.18 0
IV.OFFI.HHZ. 2018-08-08T23:25:55.28 3.0 negative manual P 0.77 0
IV.SMA1.EHZ. 2018-08-08T23:25:53.59 0.1 undecidable manual P 160 0.3157 100 -0.47 86
IV.NRCA.HHZ. 2018-08-08T23:25:52.17 0.1 undecidable manual S 211 0.1097 117 0.49 90
IV.CESI.HHZ. 2018-08-08T23:25:51.85 0.1 undecidable manual P 290 0.223 104 -0.19 93
IV.MMO1.EHZ. 2018-08-08T23:25:51.21 0.1 undecidable manual S 106 0.1034 118 -0.26 94
IV.MF5.EHZ. 2018-08-08T23:25:51.63 1.0 positive manual P 73 0.2059 105 -0.03 24
IV.NRCA.HHZ. 2018-08-08T23:25:49.89 0.1 undecidable manual P 211 0.1097 117 0.22 95
IV.MMO1.EHZ. 2018-08-08T23:25:49.38 0.1 positive manual P 106 0.1034 118 -0.17 96
IV.FDMO.HHZ. 2018-08-08T23:25:49.79 0.6 positive manual P 325 0.1322 113 -0.33 46
IV.MC2.EHZ. 2018-08-08T23:25:48.91 0.3 undecidable manual S 185 0.0171 163 -0.28 72
IV.MC2.EHZ. 2018-08-08T23:25:48.28 0.1 undecidable manual P 185 0.0171 163 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1 0.000123 0.16 AML other m 2018-08-08T23:25:52.40
IV.NRCA.HHE. ML:1.5 0.0003975 1.4 AML other m 2018-08-08T23:25:52.98
IV.NRCA.HHN. ML:1.5 0.0004255 0.1 AML other m 2018-08-08T23:25:52.98
IV.FDMO.HHE. ML:0.8 7.33E-5 1.16 AML other m 2018-08-08T23:25:53.97
IV.CESI.HHE. ML:1.3 0.0001285 0.2 AML other m 2018-08-08T23:25:56.17
IV.CESI.HHN. ML:1.4 0.000142 0.2 AML other m 2018-08-08T23:25:56.27
IV.TERO.HHN. ML:0.8 1.885E-5 1.28 AML other m 2018-08-08T23:26:03.75
IV.TERO.HHE. ML:0.7 1.745E-5 0.86 AML other m 2018-08-08T23:26:03.76
IV.CING.HHE. ML:0.9 1.75E-5 1.22 AML other m 2018-08-08T23:26:05.85
IV.CING.HHN. ML:0.9 1.83E-5 1.1 AML other m 2018-08-08T23:26:06.61
IV.ARVD.HHE. ML:0.9 1.335E-5 0.42 AML other m 2018-08-08T23:26:08.49
IV.ARVD.HHN. ML:0.7 1.046E-5 1.46 AML other m 2018-08-08T23:26:09.01
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