Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 17-10-2021 and time 06:43:47 (Italy) in region Comunanza (AP)

A magnitude ML 1.4 earthquake occured in region: Comunanza (AP), on

  • 17-10-2021 04:43:47 (UTC)
  • 17-10-2021 06:43:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9580, 13.4110 at 19 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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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 0 3166 3166
Amandola FM 5 3629 6795
Montefalcone Appennino FM 5 424 7219
Montefortino FM 6 1178 8397
Smerillo FM 6 365 8762
Force AP 7 1354 10116
Palmiano AP 8 196 10312
Monte San Martino MC 9 765 11077
Montemonaco AP 9 604 11681
Santa Vittoria in Matenano FM 10 1330 13011
Venarotta AP 11 2066 15077
Penna San Giovanni MC 11 1108 16185
Roccafluvione AP 12 2010 18195
Montelparo FM 12 778 18973
Rotella AP 12 906 19879
Sarnano MC 12 3264 23143
Gualdo MC 14 815 23958
Monteleone di Fermo FM 14 395 24353
Montegallo AP 14 523 24876
Montedinove AP 15 488 25364
Servigliano FM 15 2336 27700
Bolognola MC 16 142 27842
Sant'Angelo in Pontano MC 16 1436 29278
Monte Rinaldo FM 16 379 29657
Montalto delle Marche AP 16 2122 31779
Monsampietro Morico FM 17 659 32438
Castignano AP 17 2796 35234
Falerone FM 18 3337 38571
Ascoli Piceno AP 18 49407 87978
Ortezzano FM 18 774 88752
Belmonte Piceno FM 18 646 89398
Montottone FM 18 979 90377
San Ginesio MC 18 3498 93875
Monte Vidon Corrado FM 19 731 94606

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km NW of Teramo (54892 inhabitants)
58 Km E of Foligno (57155 inhabitants)
67 Km N of L'Aquila (69753 inhabitants)
74 Km S of Ancona (100861 inhabitants)
76 Km NE of Terni (111501 inhabitants)
78 Km NW of Montesilvano (53738 inhabitants)
85 Km E of Perugia (166134 inhabitants)
86 Km NW of Pescara (121014 inhabitants)
92 Km NW of Chieti (51815 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.4 2021-10-17
04:43:47		 42.9585 13.411 19 2022-03-30
13:04:12		 Bollettino Sismico Italiano INGV 96756291
Reviewed
Rev100 		ML 1.4 2021-10-17
04:43:48		 42.9592 13.4078 18 2021-10-17
05:00:12		 Sala Sismica INGV-Roma 96671251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-17 04:43:47 ± 0.14
Latitude 42.9585 ± 0.0054
Longitude 13.4110 ± 0.0074
Depth (km) 19 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96756291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 606
Semi-minor axis of confidence ellipse (meter) 273
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 304
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33725
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 96671251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-17 05:00:12

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 96756291
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-19 09:09:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.SCL3.EHZ.02 2021-10-17T04:45:00.54 3.0 undecidable manual Sg 10.09 0
IV.LADO.EHZ. 2021-10-17T04:44:58.97 3.0 undecidable manual Pg 14.29 0
IV.SGO.HHZ. 2021-10-17T04:44:58.65 3.0 undecidable manual Sg 7.3 0
IV.PZUN.HHZ. 2021-10-17T04:44:49.00 3.0 undecidable manual Sn -5.49 0
IV.VOBA.EHZ. 2021-10-17T04:44:40.98 3.0 positive manual Pn 5.79 0
IV.CASP.HHZ. 2021-10-17T04:44:38.14 3.0 undecidable manual Sn -1.13 0
IV.LAV9.HHZ. 2021-10-17T04:44:24.18 3.0 undecidable manual Sg 2 0
IV.PZUN.HHZ. 2021-10-17T04:44:22.09 3.0 negative manual Pn -0.33 0
IV.CAFE.HHZ. 2021-10-17T04:44:14.13 3.0 negative manual Pn -0.71 0
OT.OT17.EHZ. 2021-10-17T04:44:11.56 3.0 negative manual Pg 2.64 0
IV.VAGA.HNZ. 2021-10-17T04:44:04.00 3.0 undecidable manual Pn -1.81 0
IV.PE3.EHZ. 2021-10-17T04:44:04.08 3.0 undecidable manual Pn 1.24 0
IV.NRCA.HHZ. 2021-10-17T04:43:58.60 0.6 undecidable manual S 240 27.8499 114 0.28 45
IV.CSP1.EHZ. 2021-10-17T04:43:57.04 0.6 undecidable manual S 312 22.3554 121 0.02 48
IV.MNTT.EHZ. 2021-10-17T04:43:56.28 0.6 undecidable manual S 52 18.87 127 0.02 49
IV.MC2.EHZ. 2021-10-17T04:43:56.49 0.1 undecidable manual S 254 18.7701 127 0.25 92
IV.GUMA.HNN. 2021-10-17T04:43:55.29 0.1 undecidable manual S 332 13.0758 139 0.16 96
IV.SMA1.EHN. 2021-10-17T04:43:55.19 0.6 undecidable manual P 190 36.9297 107 -0.07 47
IV.SAP2.EHE. 2021-10-17T04:43:55.48 0.6 undecidable manual S 356 15.3735 134 -0.06 48
IV.T1299.HNN. 2021-10-17T04:43:55.33 0.1 undecidable manual P 196 37.4292 107 -0.01 95
IV.MF5.EHZ. 2021-10-17T04:43:54.08 0.1 undecidable manual S 51 5.0949 162 0.01 100
IV.MMO1.EHZ. 2021-10-17T04:43:54.26 0.1 undecidable manual S 226 9.4794 149 -0.3 94
IV.PF6.EHN. 2021-10-17T04:43:54.50 0.3 undecidable manual P 319 26.5512 116 0.73 60
IV.NRCA.HHZ. 2021-10-17T04:43:53.85 0.1 undecidable manual P 240 27.8499 114 -0.1 95
IV.OFFI.HHE. 2021-10-17T04:43:53.79 0.6 undecidable manual P 97 22.4553 121 0.57 43
IV.FDMO.HHN. 2021-10-17T04:43:53.69 0.1 undecidable manual P 288 27.6501 115 -0.23 92
IV.CSP1.EHZ. 2021-10-17T04:43:53.04 0.1 undecidable manual P 312 22.3554 121 -0.16 94
IV.MC2.EHZ. 2021-10-17T04:43:52.73 0.1 undecidable manual P 254 18.7701 127 -0.01 98
IV.GUMA.HNN. 2021-10-17T04:43:52.03 0.1 undecidable manual P 332 13.0758 139 -0.07 97
IV.MNTT.EHZ. 2021-10-17T04:43:52.99 0.1 undecidable manual P 52 18.87 127 0.23 94
IV.MNTP.HNZ. 2021-10-17T04:43:52.84 0.6 undecidable manual P 13 20.3685 124 -0.11 47
IV.MMO1.EHZ. 2021-10-17T04:43:51.54 0.1 undecidable manual P 226 9.4794 149 -0.23 95
IV.SAP2.EHE. 2021-10-17T04:43:51.98 0.3 undecidable manual P 356 15.3735 134 -0.36 68
IV.MF5.EHZ. 2021-10-17T04:43:51.45 0.1 positive manual P 51 5.0949 162 -0.05 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MNTT.EHN. ML:1.6 0.00024249999999999999 1.12 AML other m 2021-10-17T04:43:57.81
IV.MNTT.EHE. ML:1.8 0.0003865 1.78 AML other m 2021-10-17T04:43:57.89
IV.NRCA.HHN. ML:1.2 0.00007025000000000001 0.72 AML other m 2021-10-17T04:43:59.61
IV.NRCA.HHE. ML:1.0 0.000047149999999999994 1 AML other m 2021-10-17T04:43:59.49
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