Earthquake with magnitude of ML 1.0 on date 21-10-2020 and time 11:12:01 (UTC) in region 2 km E Comunanza (AP)

A magnitude ML 1.0 earthquake occured in region: 2 km E Comunanza (AP), on

  • 21-10-2020 11:12:01 (UTC)
  • 21-10-2020 13:12:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.97, 13.44 at 20 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
Comunanza AP 2 3166 3166
Montefalcone Appennino FM 3 424 3590
Smerillo FM 4 365 3955
Force AP 5 1354 5309
Amandola FM 7 3629 8938
Monte San Martino MC 7 765 9703
Palmiano AP 8 196 9899
Santa Vittoria in Matenano FM 8 1330 11229
Montefortino FM 8 1178 12407
Montelparo FM 10 778 13185
Penna San Giovanni MC 10 1108 14293
Rotella AP 10 906 15199
Venarotta AP 11 2066 17265
Montemonaco AP 12 604 17869
Monteleone di Fermo FM 12 395 18264
Roccafluvione AP 12 2010 20274
Montedinove AP 12 488 20762
Sarnano MC 13 3264 24026
Servigliano FM 14 2336 26362
Monte Rinaldo FM 14 379 26741
Gualdo MC 14 815 27556
Montalto delle Marche AP 14 2122 29678
Monsampietro Morico FM 15 659 30337
Sant'Angelo in Pontano MC 15 1436 31773
Castignano AP 15 2796 34569
Ortezzano FM 16 774 35343
Falerone FM 16 3337 38680
Montegallo AP 16 523 39203
Montottone FM 16 979 40182
Belmonte Piceno FM 16 646 40828
Ascoli Piceno AP 17 49407 90235
Bolognola MC 17 142 90377
Monte Vidon Corrado FM 18 731 91108
Monte Vidon Combatte FM 18 433 91541
San Ginesio MC 19 3498 95039
Montappone FM 19 1682 96721
Montegiorgio FM 20 6851 103572

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km NW of Teramo (54892 inhabitants)
60 Km E of Foligno (57155 inhabitants)
69 Km N of L'Aquila (69753 inhabitants)
73 Km S of Ancona (100861 inhabitants)
77 Km NW of Montesilvano (53738 inhabitants)
79 Km NE of Terni (111501 inhabitants)
85 Km NW of Pescara (121014 inhabitants)
87 Km E of Perugia (166134 inhabitants)
91 Km NW of Chieti (51815 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 1.0 2020-10-21
11:12:01
42.97 13.44 20 2020-10-21
11:16:41
Sala Sismica INGV-Roma 83985221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-21 11:12:01 ± 0.22
Latitude 42.97 ± 0.01
Longitude 13.44 ± 0.01
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83985221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 740
Semi-minor axis of confidence ellipse (meter) 398
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 297
Circular confidence region, given by single value of horizontal uncertainty (meter) 740
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.2716
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 83985221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-21 11:16:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
TV.SF04.EHZ. 2020-10-21T11:12:41.79 3.0 undecidable manual S -0.12 0
IT.LRNO.HNZ. 2020-10-21T11:12:30.69 3.0 negative manual Pn 1.47 0
IV.ATVO.HHZ. 2020-10-21T11:12:30.68 3.0 undecidable manual S -0.11 0
IV.FDMO.HHZ. 2020-10-21T11:12:12.24 0.3 undecidable manual S 285 0.2653 115 0.12 72
IV.NRCA.HNZ. 2020-10-21T11:12:12.53 0.3 undecidable manual S 241 0.2716 114 0.24 70
IV.CSP1.EHZ. 2020-10-21T11:12:10.42 0.3 undecidable manual S 306 0.2104 122 -0.28 70
IV.MTRA.HNZ. 2020-10-21T11:12:10.60 0.3 undecidable manual S 188 0.2122 122 -0.14 73
IV.MC2.EHZ. 2020-10-21T11:12:10.31 0.3 undecidable manual S 253 0.1898 125 0.12 73
IV.NRCA.HNZ. 2020-10-21T11:12:07.65 0.1 undecidable manual P 241 0.2716 114 0.01 98
IV.MF5.EHZ. 2020-10-21T11:12:07.67 0.3 undecidable manual S 39 0.027 170 0.19 75
IV.MMO1.EHZ. 2020-10-21T11:12:07.93 0.3 undecidable manual S 230 0.1052 144 -0.47 69
IV.FDMO.HHZ. 2020-10-21T11:12:07.59 0.6 negative manual P 285 0.2653 115 0.05 49
IV.MC2.EHZ. 2020-10-21T11:12:06.56 0.6 negative manual P 253 0.1898 125 0.14 49
IV.CSP1.EHZ. 2020-10-21T11:12:06.94 1.0 positive manual P 306 0.2104 122 0.22 24
IV.MTRA.HNZ. 2020-10-21T11:12:06.64 0.1 undecidable manual P 188 0.2122 122 -0.1 98
IV.MF5.EHZ. 2020-10-21T11:12:05.12 0.3 positive manual P 39 0.027 170 0.26 74
IV.MMO1.EHZ. 2020-10-21T11:12:05.30 0.1 negative manual P 230 0.1052 144 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1 3.87E-5 0.22 AML other m 2020-10-21T11:12:12.37
IV.FDMO.HHN. ML:0.9 3.34E-5 0.48 AML other m 2020-10-21T11:12:12.50
IV.CSP1.EHE. ML:1.1 6.343181E-5 1.1008 AML other m 2020-10-21T11:12:11.79
IV.CSP1.EHN. ML:1 4.638357E-5 0.1344 AML other m 2020-10-21T11:12:11.19
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