INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.8 on date 09-09-2018 and time 22:20:11 (Italy) in region 6 km N Acquasanta Terme (AP)

A magnitude ML 0.8 earthquake occured in region: 6 km N Acquasanta Terme (AP), on

  • 09-09-2018 20:20:11 (UTC)
  • 09-09-2018 22:20:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.82, 13.41 at 21 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
Acquasanta Terme AP 6 2916 2916
Montegallo AP 7 523 3439
Roccafluvione AP 7 2010 5449
Palmiano AP 9 196 5645
Venarotta AP 9 2066 7711
Arquata del Tronto AP 11 1178 8889
Montemonaco AP 11 604 9493
Valle Castellana TE 12 977 10470
Ascoli Piceno AP 14 49407 59877
Montefortino FM 14 1178 61055
Comunanza AP 15 3166 64221
Force AP 17 1354 65575
Amandola FM 18 3629 69204
Rocca Santa Maria TE 18 537 69741
Folignano AP 18 9241 78982
Montefalcone Appennino FM 19 424 79406
Rotella AP 19 906 80312
Accumoli RI 19 667 80979

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of Teramo (54892 inhabitants)
53 Km N of L'Aquila (69753 inhabitants)
59 Km E of Foligno (57155 inhabitants)
69 Km E of Terni (111501 inhabitants)
70 Km NW of Montesilvano (53738 inhabitants)
77 Km NW of Pescara (121014 inhabitants)
81 Km NW of Chieti (51815 inhabitants)
89 Km S of Ancona (100861 inhabitants)
89 Km E of Perugia (166134 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 0.8 2018-09-09
20:20:11
42.82 13.41 21 2018-09-09
20:31:10
Sala Sismica INGV-Roma 60754781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-09 20:20:11 ± 0.1
Latitude 42.82 ± 0.00
Longitude 13.41 ± 0.01
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 60754781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 457
Semi-minor axis of confidence ellipse (meter) 262
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
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) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.09623
Epicentral distance of station farthest from the epicenter (degree) 0.41189
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 60754781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-09 20:31:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GIGS.HHZ. 2018-09-09T20:20:26.08 0.3 undecidable manual S 162 0.3894 107 -0.09 71
IV.CESI.HHZ. 2018-09-09T20:20:26.89 0.3 undecidable manual S 296 0.4119 106 0.1 71
IV.PF6.EHE. 2018-09-09T20:20:25.18 0.6 undecidable manual S 333 0.3507 109 0.11 48
IV.LNSS.HHE. 2018-09-09T20:20:25.36 0.3 undecidable manual S 231 0.3498 109 0.3 69
IV.RM33.EHZ. 2018-09-09T20:20:25.19 0.6 undecidable manual S 205 0.3462 110 0.24 47
IV.FDMO.HHZ. 2018-09-09T20:20:23.87 0.3 undecidable manual S 312 0.3175 112 -0.28 70
IV.CAMP.HHN. 2018-09-09T20:20:23.27 0.3 undecidable manual S 180 0.2887 114 -0.08 73
IV.GUMA.HHZ. 2018-09-09T20:20:22.52 0.3 undecidable manual S 347 0.2446 119 0.33 70
IV.T1299.HNE. 2018-09-09T20:20:21.70 0.3 undecidable manual S 206 0.2122 124 0.34 70
IV.TERO.HHZ. 2018-09-09T20:20:21.92 0.3 undecidable manual S 145 0.2464 119 -0.32 69
IV.NRCA.HNE. 2018-09-09T20:20:21.41 0.1 undecidable manual S 273 0.2167 123 -0.09 100
IV.MC2.EHZ. 2018-09-09T20:20:20.58 0.3 undecidable manual S 298 0.1835 128 -0.12 74
IV.SMA1.EHZ. 2018-09-09T20:20:20.99 0.3 undecidable manual S 196 0.2014 125 -0.12 74
IV.GIGS.HHZ. 2018-09-09T20:20:20.01 0.6 undecidable manual P 162 0.3894 107 -0.08 48
IV.CESI.HHZ. 2018-09-09T20:20:20.37 0.3 undecidable manual P 296 0.4119 106 -0.08 72
IV.MF5.EHZ. 2018-09-09T20:20:20.77 0.3 undecidable manual S 13 0.1673 132 0.45 70
IV.LNSS.HHE. 2018-09-09T20:20:19.52 0.1 undecidable manual P 231 0.3498 109 0.08 96
IV.RM33.EHZ. 2018-09-09T20:20:19.67 0.6 undecidable manual P 205 0.3462 110 0.29 46
IV.PF6.EHE. 2018-09-09T20:20:19.07 0.1 undecidable manual P 333 0.3507 109 -0.38 90
IV.CAMP.HHN. 2018-09-09T20:20:18.41 0.3 undecidable manual P 180 0.2887 114 -0.05 73
IV.FDMO.HHZ. 2018-09-09T20:20:18.74 0.3 undecidable manual P 312 0.3175 112 -0.17 71
IV.MMO1.EHZ. 2018-09-09T20:20:18.61 0.3 undecidable manual S 321 0.0962 149 -0.36 71
IV.TERO.HHZ. 2018-09-09T20:20:17.83 0.3 undecidable manual P 145 0.2464 119 0.01 74
IV.GUMA.HHZ. 2018-09-09T20:20:17.93 0.1 undecidable manual P 347 0.2446 119 0.14 98
IV.NRCA.HNE. 2018-09-09T20:20:17.29 0.1 undecidable manual P 273 0.2167 123 -0.1 99
IV.MC2.EHZ. 2018-09-09T20:20:17.00 0.1 undecidable manual P 298 0.1835 128 0.07 100
IV.T1299.HNE. 2018-09-09T20:20:17.49 0.1 undecidable manual P 206 0.2122 124 0.18 97
IV.SMA1.EHZ. 2018-09-09T20:20:17.22 0.1 positive manual P 196 0.2014 125 0.05 100
IV.MF5.EHZ. 2018-09-09T20:20:16.88 0.1 undecidable manual P 13 0.1673 132 0.17 99
IV.MMO1.EHZ. 2018-09-09T20:20:15.73 0.1 undecidable manual P 321 0.0962 149 -0.2 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.2 8.995E-5 0.14 AML other m 2018-09-09T20:20:21.43
IV.SMA1.EHN. ML:1.1 7.2E-5 0.12 AML other m 2018-09-09T20:20:21.58
IV.GUMA.HHE. ML:1.5 0.000135 0.2 AML other m 2018-09-09T20:20:22.97
IV.TERO.HHE. ML:0.7 2.215E-5 0.08 AML other m 2018-09-09T20:20:23.23
IV.GUMA.HHN. ML:1.2 6.515E-5 1.28 AML other m 2018-09-09T20:20:23.96
IV.TERO.HHN. ML:0.7 1.995E-5 0.68 AML other m 2018-09-09T20:20:23.42
IV.FDMO.HHE. ML:0.8 1.935E-5 0.18 AML other m 2018-09-09T20:20:24.31
IV.FDMO.HHN. ML:0.9 2.3075E-5 0.52 AML other m 2018-09-09T20:20:24.58
IV.CESI.HHE. ML:0.6 1.2255E-5 0.54 AML other m 2018-09-09T20:20:28.98
IV.CESI.HHN. ML:0.8 1.3345E-5 0.42 AML other m 2018-09-09T20:20:29.45
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