Earthquake with magnitude of ML 1.9 on date 20-10-2021 and time 06:46:03 (UTC) in region 7 km W Montegallo (AP)

A magnitude ML 1.9 earthquake occured in region: 7 km W Montegallo (AP), on

  • 20-10-2021 06:46:03 (UTC)
  • 20-10-2021 08:46:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.855, 13.255 at 14 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
Montegallo AP 7 523 523
Montemonaco AP 8 604 1127
Castelsantangelo sul Nera MC 9 281 1408
Arquata del Tronto AP 10 1178 2586
Montefortino FM 12 1178 3764
Ussita MC 14 444 4208
Norcia PG 15 4957 9165
Acquasanta Terme AP 16 2916 12081
Bolognola MC 16 142 12223
Visso MC 16 1107 13330
Amandola FM 16 3629 16959
Comunanza AP 17 3166 20125
Palmiano AP 17 196 20321
Accumoli RI 18 667 20988
Preci PG 18 724 21712
Roccafluvione AP 18 2010 23722
Venarotta AP 20 2066 25788

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NW of Teramo (54892 inhabitants)
46 Km E of Foligno (57155 inhabitants)
57 Km N of L'Aquila (69753 inhabitants)
59 Km NE of Terni (111501 inhabitants)
76 Km E of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
88 Km S of Ancona (100861 inhabitants)
90 Km W of Pescara (121014 inhabitants)
93 Km NW of Chieti (51815 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.9 2021-10-20
06:46:03
42.855 13.2553 14 2021-10-20
06:55:43
Sala Sismica INGV-Roma 96791371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 06:46:03 ± 0.06
Latitude 42.8550 ± 0.0036
Longitude 13.2553 ± 0.0061
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96791371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 450
Semi-minor axis of confidence ellipse (meter) 39
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 93
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.85885
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 21
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 96791371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 06:55:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.IMOL.HNZ. 2021-10-20T06:47:03.39 3.0 undecidable manual Sg 5.77 0
IV.MPAG.EHZ. 2021-10-20T06:46:33.14 3.0 undecidable manual S 335 0.8535 92 1.89 0
IV.PIEI.HHZ. 2021-10-20T06:46:32.81 3.0 undecidable manual S 323 0.8589 92 1.4 0
IV.SRES.HHZ. 2021-10-20T06:46:30.14 3.0 undecidable manual S -1.96 0
IV.MURB.HHZ. 2021-10-20T06:46:27.39 3.0 undecidable manual S 308 0.6718 92 1.54 0
IV.MOMA.HHZ. 2021-10-20T06:46:21.63 0.6 undecidable manual S 264 0.5045 93 0.72 37
IV.EL6.EHZ. 2021-10-20T06:46:20.99 1.0 undecidable manual S 347 0.4874 93 0.6 21
IV.PIEI.HHZ. 2021-10-20T06:46:20.00 0.6 positive manual P 323 0.8589 92 0.4 40
IV.MPAG.EHZ. 2021-10-20T06:46:19.84 1.0 negative manual P 335 0.8535 92 0.33 20
IV.SNTG.HHZ. 2021-10-20T06:46:19.90 0.6 undecidable manual S 330 0.4614 94 0.28 44
IV.MURB.HHZ. 2021-10-20T06:46:17.07 0.1 undecidable manual P 308 0.6718 92 0.67 75
IV.TERO.HHZ. 2021-10-20T06:46:16.17 0.6 undecidable manual S 132 0.3453 96 -0.04 47
IV.RM33.EHZ. 2021-10-20T06:46:16.45 0.3 undecidable manual S 185 0.3471 95 0.19 69
IV.LNSS.HHZ. 2021-10-20T06:46:15.12 0.6 undecidable manual S 212 0.2977 97 0.33 45
IV.GAVE.EHZ. 2021-10-20T06:46:15.42 0.3 undecidable manual S 239 0.3112 97 0.23 68
IV.CESI.HHZ. 2021-10-20T06:46:14.65 0.6 undecidable manual S 300 0.2968 97 -0.13 48
IV.SAP2.EHZ. 2021-10-20T06:46:14.35 0.6 undecidable manual S 23 0.2635 99 0.56 44
IV.MOMA.HHZ. 2021-10-20T06:46:13.73 0.6 positive manual P 264 0.5045 93 0.18 45
IV.CING.HHZ. 2021-10-20T06:46:13.57 0.1 negative manual P 355 0.5225 93 -0.27 87
IV.MF5.EHZ. 2021-10-20T06:46:12.59 0.6 undecidable manual S 48 0.1996 104 0.64 44
IV.CSP1.EHZ. 2021-10-20T06:46:12.88 0.6 undecidable manual S 351 0.2392 100 -0.22 47
IV.SNTG.HHZ. 2021-10-20T06:46:12.37 0.1 undecidable manual P 330 0.4614 94 -0.43 85
IV.SMA1.EHZ. 2021-10-20T06:46:12.61 0.6 undecidable manual S 165 0.232 101 -0.26 47
IV.EL6.EHZ. 2021-10-20T06:46:12.91 0.3 positive manual P 347 0.4874 93 -0.34 65
IV.FDMO.HHZ. 2021-10-20T06:46:12.15 0.6 undecidable manual S 326 0.2194 102 -0.35 46
IV.MNTT.EHZ. 2021-10-20T06:46:11.17 0.3 negative manual P 50 0.3238 96 0.71 61
IV.RM33.EHZ. 2021-10-20T06:46:10.62 0.1 positive manual P 185 0.3471 95 -0.24 92
IV.TERO.HHZ. 2021-10-20T06:46:10.75 0.3 negative manual P 132 0.3453 96 -0.08 71
IV.MTRA.HNZ. 2021-10-20T06:46:10.26 0.6 undecidable manual S 133 0.143 115 -0.09 49
IV.GAVE.EHZ. 2021-10-20T06:46:10.04 0.3 positive manual P 239 0.3112 97 -0.2 70
IV.SAP2.EHZ. 2021-10-20T06:46:09.58 0.1 positive manual P 23 0.2635 99 0.14 96
IV.NRCA.HNZ. 2021-10-20T06:46:09.32 0.6 undecidable manual S 258 0.1052 127 -0.09 50
IV.CESI.HHZ. 2021-10-20T06:46:09.75 0.1 positive manual P 300 0.2968 97 -0.26 92
IV.LNSS.HHZ. 2021-10-20T06:46:09.82 0.1 positive manual P 212 0.2977 97 -0.19 94
IV.MMO1.EHZ. 2021-10-20T06:46:08.65 0.6 undecidable manual S 50 0.0683 143 0.02 50
IV.FDMO.HHZ. 2021-10-20T06:46:08.34 0.1 positive manual P 326 0.2194 102 -0.35 91
IV.MF5.EHZ. 2021-10-20T06:46:08.59 0.3 positive manual P 48 0.1996 104 0.22 72
IV.CSP1.EHZ. 2021-10-20T06:46:08.73 0.1 undecidable manual P 351 0.2392 100 -0.3 92
IV.SMA1.EHZ. 2021-10-20T06:46:08.72 0.1 positive manual P 165 0.232 101 -0.18 95
IV.MTRA.HNZ. 2021-10-20T06:46:07.36 0.1 undecidable manual P 133 0.143 115 -0.09 98
IV.MMO1.EHZ. 2021-10-20T06:46:06.42 0.1 undecidable manual P 50 0.0683 143 -0.04 100
IV.NRCA.HNZ. 2021-10-20T06:46:06.91 0.3 positive manual P 258 0.1052 127 0.01 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:2.3 0.00191 0.42 AML other m 2021-10-20T06:46:09.44
IV.NRCA.HNE. ML:2.3 0.00183 0.44 AML other m 2021-10-20T06:46:09.44
IV.NRCA.HHN. ML:2.5 0.002825 0.88 AML other m 2021-10-20T06:46:09.92
IV.NRCA.HNN. ML:2.4 0.002645 0.86 AML other m 2021-10-20T06:46:09.92
IV.MTRA.EHN. ML:1.9 0.0007165 0.18 AML other m 2021-10-20T06:46:10.33
IV.MTRA.HNN. ML:1.9 0.000747 0.54 AML other m 2021-10-20T06:46:10.33
IV.MTRA.EHE. ML:2 0.0008325 0.2 AML other m 2021-10-20T06:46:10.85
IV.MTRA.HNE. ML:2 0.000857 0.22 AML other m 2021-10-20T06:46:10.85
IV.FDMO.HHN. ML:2 0.000592 0.24 AML other m 2021-10-20T06:46:12.43
IV.FDMO.HHE. ML:1.7 0.000298 0.26 AML other m 2021-10-20T06:46:12.34
IV.MF5.EHN. ML:2 0.0006665 1.62 AML other m 2021-10-20T06:46:12.92
IV.MF5.EHE. ML:1.7 0.0002795 1.38 AML other m 2021-10-20T06:46:13.19
IV.SMA1.EHE. ML:1.7 0.0002835 0.64 AML other m 2021-10-20T06:46:13.43
IV.CSP1.EHN. ML:2 0.000504 1.02 AML other m 2021-10-20T06:46:13.86
IV.SMA1.EHN. ML:1.8 0.00031 0.48 AML other m 2021-10-20T06:46:14.29
IV.CSP1.EHE. ML:1.8 0.0003665 1.08 AML other m 2021-10-20T06:46:15.54
IV.CESI.HHN. ML:1.7 0.0001985 1.06 AML other m 2021-10-20T06:46:15.07
IV.CESI.HHE. ML:1.6 0.000174 0.12 AML other m 2021-10-20T06:46:15.57
IV.LNSS.HHE. ML:1.7 0.0002155 0.14 AML other m 2021-10-20T06:46:15.72
IV.SAP2.EHN. ML:2.4 0.00129 0.28 AML other m 2021-10-20T06:46:15.70
IV.GAVE.EHN. ML:2 0.0003495 0.28 AML other m 2021-10-20T06:46:15.86
IV.SAP2.EHE. ML:1.8 0.000313 1.08 AML other m 2021-10-20T06:46:15.34
IV.LNSS.HHN. ML:1.7 0.0002095 1.84 AML other m 2021-10-20T06:46:15.95
IV.GAVE.EHE. ML:1.9 0.000339 0.12 AML other m 2021-10-20T06:46:16.06
IV.RM33.EHN. ML:2 0.0003795 0.26 AML other m 2021-10-20T06:46:16.65
IV.TERO.HHE. ML:2 0.0003345 0.12 AML other m 2021-10-20T06:46:16.92
IV.RM33.EHE. ML:1.8 0.000214 1.76 AML other m 2021-10-20T06:46:17.05
IV.TERO.HHN. ML:1.8 0.0002465 0.1 AML other m 2021-10-20T06:46:17.20
IV.MNTT.EHN. ML:2.1 0.000538 0.7 AML other m 2021-10-20T06:46:19.12
IV.SNTG.HHE. ML:1.2 4.005E-5 0.32 AML other m 2021-10-20T06:46:20.52
IV.SNTG.HHN. ML:1.2 3.98E-5 0.58 AML other m 2021-10-20T06:46:21.26
IV.EL6.EHE. ML:1.7 0.00010645 0.58 AML other m 2021-10-20T06:46:21.38
IV.MOMA.HHN. ML:1.6 7.93E-5 0.52 AML other m 2021-10-20T06:46:22.59
IV.EL6.EHN. ML:1.6 8.505E-5 0.56 AML other m 2021-10-20T06:46:22.55
IV.CING.HHN. ML:1.4 5.645E-5 0.5 AML other m 2021-10-20T06:46:23.53
IV.CING.HHE. ML:1.5 7.03E-5 1.42 AML other m 2021-10-20T06:46:23.00
IV.MOMA.HHE. ML:1.5 6.575E-5 0.2 AML other m 2021-10-20T06:46:24.14
IV.MNTT.EHE. ML:2.5 0.00122 0.08 AML other m 2021-10-20T06:46:25.96
IV.MURB.HHE. ML:2.1 0.000184 0.24 AML other m 2021-10-20T06:46:28.36
IV.MURB.HHN. ML:2 0.0001495 1 AML other m 2021-10-20T06:46:29.46
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download