Earthquake with magnitude of ML 1.5 on date 20-10-2021 and time 07:38:00 (Italy) in region 7 km W Montegallo (AP)

A magnitude ML 1.5 earthquake occured in region: 7 km W Montegallo (AP), on

  • 20-10-2021 05:38:00 (UTC)
  • 20-10-2021 07:38:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.861, 13.246 at 13 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 8 523 523
Montemonaco AP 8 604 1127
Castelsantangelo sul Nera MC 8 281 1408
Arquata del Tronto AP 11 1178 2586
Montefortino FM 12 1178 3764
Ussita MC 13 444 4208
Norcia PG 15 4957 9165
Visso MC 15 1107 10272
Bolognola MC 15 142 10414
Amandola FM 16 3629 14043
Acquasanta Terme AP 17 2916 16959
Preci PG 17 724 17683
Comunanza AP 18 3166 20849
Palmiano AP 18 196 21045
Accumoli RI 18 667 21712
Roccafluvione AP 19 2010 23722
Acquacanina MC 20 121 23843
Sarnano MC 20 3264 27107

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NW of Teramo (54892 inhabitants)
45 Km E of Foligno (57155 inhabitants)
58 Km N of L'Aquila (69753 inhabitants)
59 Km NE of Terni (111501 inhabitants)
75 Km E of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
87 Km S of Ancona (100861 inhabitants)
91 Km W of Pescara (121014 inhabitants)
94 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 1.5 2021-10-20
05:38:00
42.861 13.2455 13 2021-10-20
06:05:02
Sala Sismica INGV-Roma 96788491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 05:38:00 ± 0.08
Latitude 42.8610 ± 0.0036
Longitude 13.2455 ± 0.0061
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96788491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 478
Semi-minor axis of confidence ellipse (meter) 120
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 22
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
Epicentral distance of station farthest from the epicenter (degree) 0.32196
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 96788491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 06:05:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TST02.HHZ. 2021-10-20T05:38:41.24 3.0 undecidable manual S 2.56 0
IV.SRES.HHZ. 2021-10-20T05:38:26.37 3.0 undecidable manual S -2.68 0
IV.VCEL.EHZ. 2021-10-20T05:38:20.75 3.0 undecidable manual S -2.27 0
IV.MML1.EHZ. 2021-10-20T05:38:12.61 0.6 undecidable manual S 322 0.322 95 0.18 46
IV.GAVE.EHZ. 2021-10-20T05:38:12.18 0.6 undecidable manual S 237 0.3076 96 0.16 46
IV.CESI.HHZ. 2021-10-20T05:38:11.70 0.6 undecidable manual S 300 0.2878 96 0.27 46
IV.CING.HHZ. 2021-10-20T05:38:10.45 3.0 negative manual P -0.16 0
IV.T1299.HNZ. 2021-10-20T05:38:09.86 0.6 undecidable manual S 173 0.2284 100 0.19 47
IV.MF5.EHZ. 2021-10-20T05:38:09.48 0.6 undecidable manual S 51 0.2014 102 0.58 44
IV.EL6.EHZ. 2021-10-20T05:38:09.85 3.0 negative manual P -0.11 0
IV.CSP1.EHZ. 2021-10-20T05:38:09.67 0.6 undecidable manual S 353 0.2329 99 -0.13 48
IV.FDMO.HHZ. 2021-10-20T05:38:08.88 0.6 undecidable manual S 327 0.2104 101 -0.27 47
IV.GAVE.EHZ. 2021-10-20T05:38:07.19 0.6 undecidable manual P 237 0.3076 96 0.08 47
IV.RM33.EHZ. 2021-10-20T05:38:07.54 3.0 positive manual P -0.08 0
IV.MML1.EHZ. 2021-10-20T05:38:07.01 1.0 undecidable manual P 322 0.322 95 -0.34 23
IV.MTRA.EHZ. 2021-10-20T05:38:07.18 0.6 undecidable manual S 133 0.152 111 -0.31 46
IV.TERO.HHZ. 2021-10-20T05:38:07.61 3.0 positive manual Pg -0.07 0
IV.LNSS.HHZ. 2021-10-20T05:38:06.73 3.0 positive manual P 0.04 0
IV.NRCA.HHZ. 2021-10-20T05:38:06.20 0.6 undecidable manual S 254 0.0998 128 0.05 50
IV.CESI.HHZ. 2021-10-20T05:38:06.62 0.3 positive manual P 300 0.2878 96 -0.15 71
IV.CSP1.EHZ. 2021-10-20T05:38:05.58 1.0 undecidable manual P 353 0.2329 99 -0.25 23
IV.MMO1.EHZ. 2021-10-20T05:38:05.40 0.6 undecidable manual S 57 0.071 141 -0.14 48
IV.SMA1.EHZ. 2021-10-20T05:38:05.64 3.0 positive manual P -0.05 0
IV.MC2.EHZ. 2021-10-20T05:38:05.90 0.3 undecidable manual S 321 0.0657 144 0.47 70
IV.FDMO.HHZ. 2021-10-20T05:38:05.22 0.1 positive manual P 327 0.2104 101 -0.23 94
IV.T1299.HNZ. 2021-10-20T05:38:05.69 0.1 undecidable manual P 173 0.2284 100 -0.07 97
IV.MF5.EHZ. 2021-10-20T05:38:05.55 0.3 positive manual P 51 0.2014 102 0.24 71
IV.MTRA.EHZ. 2021-10-20T05:38:04.29 0.1 undecidable manual P 133 0.152 111 -0.21 95
IV.NRCA.HHZ. 2021-10-20T05:38:03.76 0.1 negative manual P 254 0.0998 128 0.04 100
IV.MMO1.EHZ. 2021-10-20T05:38:03.28 0.6 undecidable manual P 57 0.071 141 -0.09 49
IV.MC2.EHZ. 2021-10-20T05:38:03.31 1.0 positive manual P 321 0.0657 144 0 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.8 0.00071069635 0.0608 AML other m 2021-10-20T05:38:06.35
IV.NRCA.HNE. ML:1.9 0.000844 0.14 AML other m 2021-10-20T05:38:06.34
IV.NRCA.HNN. ML:1.9 0.000827 0.08 AML other m 2021-10-20T05:38:06.82
IV.NRCA.HHN. ML:2 0.0009045 0.08 AML other m 2021-10-20T05:38:06.78
IV.MTRA.EHN. ML:1.5 0.0002449532 0.08 AML other m 2021-10-20T05:38:07.31
IV.MTRA.EHE. ML:1.7 0.0003738859 0.1408 AML other m 2021-10-20T05:38:07.64
IV.FDMO.HHN. ML:1.6 0.000264 0.24 AML other m 2021-10-20T05:38:09.30
IV.FDMO.HHE. ML:1.4 0.0001415 0.24 AML other m 2021-10-20T05:38:09.21
IV.SMA1.EHN. ML:1.4 0.00011835415 0.0992 AML other m 2021-10-20T05:38:10.24
IV.SMA1.EHE. ML:1.4 0.00013 0.08 AML other m 2021-10-20T05:38:10.35
IV.CSP1.EHN. ML:1.4 0.00015105025 0.24 AML other m 2021-10-20T05:38:09.85
IV.CSP1.EHE. ML:1.5 0.0001645 0.4 AML other m 2021-10-20T05:38:11.30
IV.RM33.EHN. ML:1.6 0.000143 0.24 AML other m 2021-10-20T05:38:13.71
IV.TERO.HHE. ML:1.6 0.0001265 0.1 AML other m 2021-10-20T05:38:13.83
IV.RM33.EHE. ML:1.4 9.595E-5 0.12 AML other m 2021-10-20T05:38:13.96
IV.TERO.HHN. ML:1.5 0.0001061 0.08 AML other m 2021-10-20T05:38:14.16
IV.MTRA.HNE. ML:1.7 0.00035846045 0.1376 AML other m 2021-10-20T05:38:07.64
IV.MTRA.HNN. ML:1.5 0.0002457007 0.08 AML other m 2021-10-20T05:38:07.31
IV.MF5.EHE. ML:1.2 0.000105888165 0.1824 AML other m 2021-10-20T05:38:10.04
IV.MF5.EHN. ML:1.3 0.00013478318 0.1984 AML other m 2021-10-20T05:38:09.76
IV.CESI.HHE. ML:1.3 8.1741945E-5 0.16 AML other m 2021-10-20T05:38:12.55
IV.CESI.HHN. ML:1.3 9.2838655E-5 0.24 AML other m 2021-10-20T05:38:11.92
IV.CESI.HNE. ML:1.5 0.00013096195 0.6496 AML other m 2021-10-20T05:38:19.25
IV.CESI.HNN. ML:1.5 0.00013488425 0.48 AML other m 2021-10-20T05:38:13.57
IV.LNSS.HHE. ML:1.4 9.6133045E-5 0.1216 AML other m 2021-10-20T05:38:12.59
IV.LNSS.HHN. ML:1.4 0.000105447895 0.1408 AML other m 2021-10-20T05:38:12.41
IV.LNSS.HNE. ML:1.5 0.000139433265 0.992 AML other m 2021-10-20T05:38:18.06
IV.LNSS.HNN. ML:1.5 0.0001431308 0.8 AML other m 2021-10-20T05:38:07.44
IV.MML1.HNE. ML:1.4 0.00010714142 0.848 AML other m 2021-10-20T05:38:26.40
IV.MML1.HNN. ML:1.5 0.000128779645 0.56 AML other m 2021-10-20T05:38:18.37
IV.MML1.EHE. ML:1 4.0431425E-5 0.0992 AML other m 2021-10-20T05:38:13.13
IV.MML1.EHN. ML:1.2 5.587028E-5 0.1408 AML other m 2021-10-20T05:38:12.70
IV.GAVE.EHE. ML:1.4 0.0001034558 0.1216 AML other m 2021-10-20T05:38:13.06
IV.GAVE.EHN. ML:1.6 0.00014945625 0.2784 AML other m 2021-10-20T05:38:12.80
IV.GAVE.HNE. ML:1.5 0.0001296121 0.7904 AML other m 2021-10-20T05:38:20.64
IV.GAVE.HNN. ML:1.7 0.00018346325 0.8096 AML other m 2021-10-20T05:38:17.57
IV.RM33.HNE. ML:1.7 0.0001725878 0.8096 AML other m 2021-10-20T05:38:22.65
IV.RM33.HNN. ML:1.7 0.0001589595 0.2496 AML other m 2021-10-20T05:38:13.71
IV.TERO.HNE. ML:1.5 0.000116293895 0.0896 AML other m 2021-10-20T05:38:13.84
IV.TERO.HNN. ML:1.6 0.00014026417 0.6496 AML other m 2021-10-20T05:38:26.22
IV.EL6.EHE. ML:1.1 3.2426105E-5 0.24 AML other m 2021-10-20T05:38:18.69
IV.EL6.EHN. ML:1.1 2.9477155E-5 0.2208 AML other m 2021-10-20T05:38:19.82
IV.CING.HNE. ML:3.5 0.007461058 0.6816 AML other m 2021-10-20T05:38:20.02
IV.CING.HNN. ML:3.3 0.0042508085 0.8096 AML other m 2021-10-20T05:38:21.22
IV.CING.HHE. ML:1.1 2.9125755E-5 0.1184 AML other m 2021-10-20T05:38:20.58
IV.CING.HHN. ML:1 2.1714535E-5 0.1184 AML other m 2021-10-20T05:38:20.94
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