Earthquake with magnitude of ML 1.4 on date 17-10-2021 and time 06:43:48 (Italy) in region 1 km W Comunanza (AP)

A magnitude ML 1.4 earthquake occured in region: 1 km W Comunanza (AP), on

  • 17-10-2021 04:43:48 (UTC)
  • 17-10-2021 06:43:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.959, 13.408 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
Comunanza AP 1 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
Penna San Giovanni MC 11 1108 14119
Venarotta AP 11 2066 16185
Roccafluvione AP 12 2010 18195
Sarnano MC 12 3264 21459
Montelparo FM 12 778 22237
Rotella AP 13 906 23143
Gualdo MC 13 815 23958
Monteleone di Fermo FM 14 395 24353
Montegallo AP 14 523 24876
Montedinove AP 15 488 25364
Bolognola MC 15 142 25506
Servigliano FM 15 2336 27842
Sant'Angelo in Pontano MC 16 1436 29278
Monte Rinaldo FM 16 379 29657
Montalto delle Marche AP 17 2122 31779
Monsampietro Morico FM 17 659 32438
Falerone FM 18 3337 35775
Castignano AP 18 2796 38571
Ascoli Piceno AP 18 49407 87978
Ortezzano FM 18 774 88752
San Ginesio MC 18 3498 92250
Belmonte Piceno FM 18 646 92896
Montottone FM 19 979 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)
57 Km E of Foligno (57155 inhabitants)
68 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)
84 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
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 1.4 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 04:43:48 ± 0.14
Latitude 42.9592 ± 0.0072
Longitude 13.4078 ± 0.0074
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 96671251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 842
Semi-minor axis of confidence ellipse (meter) 335
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 321
Circular confidence region, given by single value of horizontal uncertainty (meter) 840
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 172
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.24911
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 6
Magnitude 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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IX.SCL3.EHZ.02 2021-10-17T04:45:00.54 3.0 undecidable manual Sg 10.09 0
IV.SGO.HHZ. 2021-10-17T04:44:58.65 3.0 undecidable manual Sg 7.3 0
IV.LADO.EHZ. 2021-10-17T04:44:58.97 3.0 undecidable manual Pg 14.29 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.PE3.EHZ. 2021-10-17T04:44:04.08 3.0 undecidable manual Pn 1.24 0
IV.VAGA.HNZ. 2021-10-17T04:44:04.00 3.0 undecidable manual Pn -1.81 0
IV.NRCA.HHZ. 2021-10-17T04:43:58.60 0.6 undecidable manual S 240 0.2491 112 0.27 46
IV.CSP1.EHZ. 2021-10-17T04:43:57.04 0.6 undecidable manual S 312 0.1988 119 0.05 49
IV.MC2.EHZ. 2021-10-17T04:43:56.50 0.6 undecidable manual S 253 0.1673 125 0.31 46
IV.MNTT.EHZ. 2021-10-17T04:43:56.28 0.6 undecidable manual S 53 0.1718 124 -0.02 49
IV.MF5.EHZ. 2021-10-17T04:43:54.11 0.6 undecidable manual S 53 0.0477 161 0.11 49
IV.MMO1.EHZ. 2021-10-17T04:43:54.37 0.6 undecidable manual S 225 0.0845 147 -0.11 49
IV.NRCA.HHZ. 2021-10-17T04:43:53.87 0.1 negative manual P 240 0.2491 112 -0.15 95
IV.MNTT.EHZ. 2021-10-17T04:43:53.02 0.1 negative manual P 53 0.1718 124 0.18 95
IV.CSP1.EHZ. 2021-10-17T04:43:53.06 0.3 negative manual P 312 0.1988 119 -0.18 71
IV.MC2.EHZ. 2021-10-17T04:43:52.75 1.0 undecidable manual P 253 0.1673 125 -0.03 25
IV.MMO1.EHZ. 2021-10-17T04:43:51.61 0.3 undecidable manual P 225 0.0845 147 -0.18 73
IV.MF5.EHZ. 2021-10-17T04:43:51.47 0.1 positive manual P 53 0.0477 161 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MNTT.EHN. ML:1.6 0.0002425 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 7.025E-5 0.72 AML other m 2021-10-17T04:43:59.61
IV.NRCA.HHE. ML:1 4.715E-5 1 AML other m 2021-10-17T04:43:59.49
IV.PE3.EHN. ML:2 8.81E-5 0.44 AML other m 2021-10-17T04:44:19.74
IV.VAGA.HNN. ML:3.8 0.002055 1.14 AML other m 2021-10-17T04:44:21.69
IV.VAGA.HNE. ML:3.8 0.00198 1.18 AML other m 2021-10-17T04:44:21.70
IV.PE3.EHE. ML:2.1 0.00010525 1.58 AML other m 2021-10-17T04:44:46.13
OT.OT17.EHN. ML:3.6 0.0009725 0.04 AML other m 2021-10-17T04:44:47.10
OT.OT17.EHE. ML:3.4 0.000616 1.28 AML other m 2021-10-17T04:44:47.10
IV.CASP.HHN. ML:2.3 5.7E-5 0.88 AML other m 2021-10-17T04:44:51.87
IV.CASP.HHE. ML:2.3 5.97E-5 0.3 AML other m 2021-10-17T04:44:51.43
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