Earthquake with magnitude of ML 1.1 on date 20-08-2019 and time 10:19:45 (Italy) in region 5 km W Arquata del Tronto (AP)

A magnitude ML 1.1 earthquake occured in region: 5 km W Arquata del Tronto (AP), on

  • 20-08-2019 08:19:45 (UTC)
  • 20-08-2019 10:19:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.79, 13.24 at 11 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
Arquata del Tronto AP 5 1178 1178
Montegallo AP 10 523 1701
Accumoli RI 10 667 2368
Norcia PG 12 4957 7325
Acquasanta Terme AP 14 2916 10241
Castelsantangelo sul Nera MC 14 281 10522
Montemonaco AP 14 604 11126
Amatrice RI 18 2657 13783
Montefortino FM 19 1178 14961
Ussita MC 20 444 15405
Preci PG 20 724 16129
Cittareale RI 20 482 16611

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Teramo (54892 inhabitants)
48 Km E of Foligno (57155 inhabitants)
50 Km N of L'Aquila (69753 inhabitants)
55 Km E of Terni (111501 inhabitants)
78 Km E of Perugia (166134 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
87 Km W of Pescara (121014 inhabitants)
90 Km NW of Chieti (51815 inhabitants)
95 Km S of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km NE of Tivoli (56533 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 1.1 2019-08-20
08:19:45
42.79 13.24 11 2019-08-20
08:33:26
Sala Sismica INGV-Roma 71643341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-20 08:19:45 ± 0.05
Latitude 42.79 ± 0.00
Longitude 13.24 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71643341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 368
Semi-minor axis of confidence ellipse (meter) 232
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 44
Circular confidence region, given by single value of horizontal uncertainty (meter) 370
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 26
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
Epicentral distance of station farthest from the epicenter (degree) 0.41189
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 18
Type of magnitude ML
Reference to an origin 71643341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-20 08:33:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MML1.EHE. 2019-08-20T08:19:59.02 0.6 undecidable manual S 329 0.3822 50 -0.05 49
IV.GIGS.HHZ. 2019-08-20T08:19:59.85 0.6 undecidable manual S 144 0.4119 50 -0.11 48
IV.CESI.HHE. 2019-08-20T08:19:57.51 0.6 undecidable manual S 311 0.3301 50 -0.02 50
IV.CAMP.HHE. 2019-08-20T08:19:56.11 0.6 undecidable manual S 154 0.2788 50 0.1 50
IV.GAVE.EHZ. 2019-08-20T08:19:56.12 0.6 undecidable manual S 250 0.2734 50 0.27 48
IV.CSP1.EHZ. 2019-08-20T08:19:56.69 0.6 undecidable manual S 355 0.3058 50 -0.12 49
IV.TERO.HHZ. 2019-08-20T08:19:56.97 0.3 undecidable manual S 122 0.3112 50 0 76
IV.MF5.EHE. 2019-08-20T08:19:55.97 0.6 undecidable manual S 38 0.2554 50 0.66 43
IV.LNSS.HHE. 2019-08-20T08:19:54.91 1.0 undecidable manual S 219 0.2374 50 0.14 25
IV.FIAM.HHZ. 2019-08-20T08:19:54.81 3.0 positive manual P -1.26 0
IV.MML1.EHE. 2019-08-20T08:19:53.04 0.3 undecidable manual P 329 0.3822 50 -0.18 72
IV.GIGS.HHZ. 2019-08-20T08:19:53.71 0.3 undecidable manual P 144 0.4119 50 -0.02 74
IV.TERO.HHZ. 2019-08-20T08:19:52.23 0.3 undecidable manual P 122 0.3112 50 0.22 72
IV.CESI.HHE. 2019-08-20T08:19:52.23 0.6 undecidable manual P 311 0.3301 50 -0.1 49
IV.CSP1.EHZ. 2019-08-20T08:19:51.74 0.3 negative manual P 355 0.3058 50 -0.17 73
IV.MC2.EHZ. 2019-08-20T08:19:51.74 0.3 undecidable manual S 342 0.1304 127 0.23 75
IV.CAMP.HHE. 2019-08-20T08:19:51.46 0.3 undecidable manual P 154 0.2788 50 0 76
IV.GAVE.EHZ. 2019-08-20T08:19:51.47 0.6 undecidable manual P 250 0.2734 50 0.11 50
IV.MMO1.EHZ. 2019-08-20T08:19:51.20 0.3 undecidable manual S 28 0.1277 127 -0.22 75
IV.MF5.EHE. 2019-08-20T08:19:50.94 0.1 undecidable manual P 38 0.2554 50 -0.11 100
IV.NRCA.HNZ. 2019-08-20T08:19:50.75 0.6 undecidable manual S 296 0.1061 133 -0.02 52
IV.MTRA.EHZ. 2019-08-20T08:19:50.97 0.3 undecidable manual S 105 0.116 130 -0.1 77
IV.LNSS.HHE. 2019-08-20T08:19:50.08 0.6 undecidable manual P 219 0.2374 50 -0.66 43
IV.MTRA.EHZ. 2019-08-20T08:19:48.74 0.3 undecidable manual P 105 0.116 130 0.14 77
IV.MMO1.EHZ. 2019-08-20T08:19:48.74 0.3 undecidable manual P 28 0.1277 127 -0.06 78
IV.MC2.EHZ. 2019-08-20T08:19:48.96 0.6 negative manual P 342 0.1304 127 0.11 51
IV.NRCA.HNZ. 2019-08-20T08:19:48.58 0.3 negative manual P 296 0.1061 133 0.15 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.4 0.00028795875 0.1216 AML other m 2019-08-20T08:19:51.26
IV.NRCA.HHN. ML:1.5 0.000354199 0.1216 AML other m 2019-08-20T08:19:50.00
IV.NRCA.HNE. ML:1.4 0.0002560927 0.1152 AML other m 2019-08-20T08:19:51.21
IV.NRCA.HNN. ML:1.5 0.0003415786 0.096 AML other m 2019-08-20T08:19:50.95
IV.MTRA.EHE. ML:1 0.00010453841 0.096 AML other m 2019-08-20T08:19:51.34
IV.MTRA.EHN. ML:0.9 7.4299445E-5 0.3776 AML other m 2019-08-20T08:19:51.59
IV.GAVE.HNE. ML:1.3 9.611517E-5 0.6976 AML other m 2019-08-20T08:19:52.19
IV.GAVE.HNN. ML:1.5 0.0001660762 0.9024 AML other m 2019-08-20T08:19:59.50
IV.GAVE.EHE. ML:1 4.74244E-5 0.16 AML other m 2019-08-20T08:19:57.14
IV.GAVE.EHN. ML:1.1 5.697437E-5 0.1024 AML other m 2019-08-20T08:19:56.72
IV.CSP1.EHE. ML:0.6 1.4488911E-5 0.6976 AML other m 2019-08-20T08:19:51.46
IV.CSP1.EHN. ML:0.4 9.988115E-6 0.1792 AML other m 2019-08-20T08:20:03.36
IV.TERO.HHE. ML:0.8 2.5591305E-5 0.0768 AML other m 2019-08-20T08:19:57.40
IV.TERO.HHN. ML:1 3.7558115E-5 0.096 AML other m 2019-08-20T08:19:57.31
IV.TERO.HNE. ML:2.2 0.0005989701 0.7296 AML other m 2019-08-20T08:20:07.85
IV.TERO.HNN. ML:1.3 9.058011E-5 0.7808 AML other m 2019-08-20T08:19:53.22
IV.GIGS.HHE. ML:0.2 3.1153673E-6 0.1216 AML other m 2019-08-20T08:20:00.91
IV.GIGS.HHN. ML:0.2 3.783368E-6 0.1216 AML other m 2019-08-20T08:20:00.32
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