Earthquake with magnitude of ML 1.8 on date 16-10-2020 and time 17:40:01 (Italy) in region 2 km NE Arquata del Tronto (AP)

A magnitude ML 1.8 earthquake occured in region: 2 km NE Arquata del Tronto (AP), on

  • 16-10-2020 15:40:01 (UTC)
  • 16-10-2020 17:40:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.78, 13.31 at 18 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 2 1178 1178
Montegallo AP 7 523 1701
Acquasanta Terme AP 8 2916 4617
Accumoli RI 11 667 5284
Montemonaco AP 13 604 5888
Roccafluvione AP 16 2010 7898
Valle Castellana TE 16 977 8875
Amatrice RI 17 2657 11532
Palmiano AP 18 196 11728
Castelsantangelo sul Nera MC 18 281 12009
Montefortino FM 18 1178 13187
Norcia PG 18 4957 18144
Venarotta AP 18 2066 20210

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km W of Teramo (54892 inhabitants)
49 Km N of L'Aquila (69753 inhabitants)
53 Km E of Foligno (57155 inhabitants)
60 Km E of Terni (111501 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
83 Km E of Perugia (166134 inhabitants)
85 Km NW of Chieti (51815 inhabitants)
94 Km S of Ancona (100861 inhabitants)
100 Km NE of Guidonia Montecelio (88673 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
Reviewed
Rev100
ML 1.8 2020-10-16
15:40:01
42.78 13.31 18 2020-10-16
15:50:44
Sala Sismica INGV-Roma 83823561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-16 15:40:01 ± 0.08
Latitude 42.78 ± 0.00
Longitude 13.31 ± 0.01
Depth (km) 18 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83823561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 487
Semi-minor axis of confidence ellipse (meter) 481
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 60
Circular confidence region, given by single value of horizontal uncertainty (meter) 490
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.56567
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 29
Type of magnitude ML
Reference to an origin 83823561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-16 15:50:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-10-16T15:40:13.04 1.0 undecidable manual P 344 0.5657 98 0.14 23
IV.NRCA.HHZ. 2020-10-16T15:40:09.35 0.6 undecidable manual S 289 0.1529 129 -0.17 49
IV.T1299.HNZ. 2020-10-16T15:40:09.85 0.6 undecidable manual S 188 0.152 129 0.34 47
IV.SMA1.EHZ. 2020-10-16T15:40:09.44 0.6 undecidable manual S 174 0.1556 129 -0.14 49
IV.GIGS.HHE. 2020-10-16T15:40:09.60 0.1 undecidable manual P 150 0.3831 103 -0.23 92
IV.MC2.EHZ. 2020-10-16T15:40:09.92 0.6 undecidable manual S 325 0.1556 129 0.34 47
IV.RM33.EHZ. 2020-10-16T15:40:08.28 0.1 undecidable manual P 195 0.2851 110 0.06 97
IV.FDMO.HHZ. 2020-10-16T15:40:08.26 0.1 negative manual P 327 0.3004 108 -0.21 94
IV.CSP1.EHZ. 2020-10-16T15:40:08.57 0.1 negative manual P 346 0.3166 107 -0.17 95
IV.LNSS.HHZ. 2020-10-16T15:40:08.14 0.3 undecidable manual P 228 0.2698 111 0.16 72
IV.TERO.HHZ. 2020-10-16T15:40:07.87 0.3 undecidable manual P 127 0.2689 111 -0.09 72
IV.FEMA.HNZ. 2020-10-16T15:40:07.80 0.3 undecidable manual P 313 0.2608 112 -0.04 74
IV.MF5.EHZ. 2020-10-16T15:40:07.62 0.1 negative manual P 28 0.2302 116 0.27 94
IV.MTRA.HNZ. 2020-10-16T15:40:07.56 0.6 undecidable manual S 114 0.0683 154 -0.38 47
IV.SMA1.EHZ. 2020-10-16T15:40:06.33 0.1 undecidable manual P 174 0.1556 129 0.06 100
IV.MC2.EHZ. 2020-10-16T15:40:06.30 0.1 negative manual P 325 0.1556 129 0.04 100
IV.NRCA.HHZ. 2020-10-16T15:40:06.16 0.1 undecidable manual P 289 0.1529 129 -0.07 100
IV.T1299.HNZ. 2020-10-16T15:40:06.47 0.1 undecidable manual P 188 0.152 129 0.25 96
IV.MMO1.EHZ. 2020-10-16T15:40:05.59 3.0 negative manual P -0.13 0
IV.MTRA.HNZ. 2020-10-16T15:40:05.20 0.3 undecidable manual P 114 0.0683 154 -0.12 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.9 0.0007517702 0.1408 AML other m 2020-10-16T15:40:07.74
IV.MTRA.EHN. ML:1.9 0.00073831745 0.2176 AML other m 2020-10-16T15:40:07.62
IV.MTRA.HNE. ML:1.9 0.0007329615 0.1408 AML other m 2020-10-16T15:40:07.74
IV.MTRA.HNN. ML:1.9 0.00068227685 0.2048 AML other m 2020-10-16T15:40:07.62
IV.NRCA.HHE. ML:2 0.00069390445 0.1024 AML other m 2020-10-16T15:40:09.83
IV.NRCA.HHN. ML:2.3 0.001320058 0.1408 AML other m 2020-10-16T15:40:09.49
IV.NRCA.HNE. ML:2 0.00063071515 0.1024 AML other m 2020-10-16T15:40:09.83
IV.NRCA.HNN. ML:2.3 0.001227496 0.1408 AML other m 2020-10-16T15:40:09.48
IV.SMA1.EHE. ML:1.9 0.00051314375 0.0768 AML other m 2020-10-16T15:40:09.77
IV.SMA1.EHN. ML:1.9 0.0004688787 0.1408 AML other m 2020-10-16T15:40:09.72
IV.MF5.EHE. ML:1.4 0.000136161835 0.128 AML other m 2020-10-16T15:40:13.01
IV.MF5.EHN. ML:1.6 0.00020627562 0.1152 AML other m 2020-10-16T15:40:12.97
IV.TERO.HHE. ML:1.5 0.0001360047 0.0896 AML other m 2020-10-16T15:40:13.50
IV.TERO.HHN. ML:1.6 0.0001577838 0.0768 AML other m 2020-10-16T15:40:12.99
IV.TERO.HNN. ML:1.6 0.00016078038 0.1536 AML other m 2020-10-16T15:40:13.11
IV.LNSS.HHE. ML:1.8 0.0002477109 0.1664 AML other m 2020-10-16T15:40:13.23
IV.LNSS.HHN. ML:1.8 0.0002520989 0.1664 AML other m 2020-10-16T15:40:13.45
IV.LNSS.HNE. ML:1.7 0.0002357226 0.1792 AML other m 2020-10-16T15:40:13.24
IV.LNSS.HNN. ML:1.8 0.0002446914 0.2688 AML other m 2020-10-16T15:40:13.44
IV.FDMO.HHE. ML:1.7 0.00018164065 0.1152 AML other m 2020-10-16T15:40:13.61
IV.FDMO.HHN. ML:1.5 0.000122646795 0.0768 AML other m 2020-10-16T15:40:13.45
IV.RM33.HNE. ML:1.7 0.000184922335 0.128 AML other m 2020-10-16T15:40:14.34
IV.RM33.HNN. ML:1.6 0.00016070085 0.2304 AML other m 2020-10-16T15:40:15.10
IV.RM33.EHE. ML:1.7 0.00019362125 0.1408 AML other m 2020-10-16T15:40:14.34
IV.RM33.EHN. ML:1.5 0.000122783 0.1024 AML other m 2020-10-16T15:40:13.80
IV.CSP1.EHE. ML:1.8 0.00024450685 0.2048 AML other m 2020-10-16T15:40:14.02
IV.CSP1.EHN. ML:1.8 0.00023834495 0.2176 AML other m 2020-10-16T15:40:13.95
IV.EL6.EHE. ML:1.7 9.888949E-5 0.1408 AML other m 2020-10-16T15:40:23.03
IV.EL6.EHN. ML:1.7 8.8271725E-5 0.1664 AML other m 2020-10-16T15:40:23.07
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