Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 10-10-2021 and time 06:55:35 (Italy) in region 3 km NW Monsampolo del Tronto (AP)

A magnitude ML 1.4 earthquake occured in region: 3 km NW Monsampolo del Tronto (AP), on

  • 10-10-2021 04:55:35 (UTC)
  • 10-10-2021 06:55:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9210, 13.7750 at 28 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
Monsampolo del Tronto AP 3 4611 4611
Spinetoli AP 3 7215 11826
Acquaviva Picena AP 4 3831 15657
Castorano AP 5 2380 18037
Monteprandone AP 5 12655 30692
Colli del Tronto AP 5 3668 34360
Offida AP 7 5058 39418
Castel di Lama AP 8 8634 48052
Controguerra TE 8 2436 50488
Ripatransone AP 9 4309 54797
Appignano del Tronto AP 9 1785 56582
San Benedetto del Tronto AP 9 47303 103885
Colonnella TE 9 3734 107619
Ancarano TE 10 1857 109476
Cossignano AP 10 978 110454
Torano Nuovo TE 11 1611 112065
Grottammare AP 11 16006 128071
Corropoli TE 11 5045 133116
Sant'Egidio alla Vibrata TE 12 9811 142927
Nereto TE 12 5242 148169
Martinsicuro TE 12 16033 164202
Maltignano AP 12 2401 166603
Castignano AP 13 2796 169399
Cupra Marittima AP 14 5398 174797
Carassai AP 15 1100 175897
Massignano AP 15 1638 177535
Montefiore dell'Aso AP 15 2123 179658
Sant'Omero TE 15 5243 184901
Alba Adriatica TE 15 12353 197254
Montalto delle Marche AP 16 2122 199376
Folignano AP 16 9241 208617
Montedinove AP 16 488 209105
Tortoreto TE 17 11542 220647
Ascoli Piceno AP 18 49407 270054
Rotella AP 18 906 270960
Campofilone FM 18 1916 272876
Ortezzano FM 18 774 273650
Monte Vidon Combatte FM 19 433 274083
Civitella del Tronto TE 19 5116 279199
Moresco FM 19 598 279797
Petritoli FM 19 2335 282132
Monterubbiano FM 19 2230 284362
Bellante TE 20 7152 291514
Monte Rinaldo FM 20 379 291893

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km N of Teramo (54892 inhabitants)
55 Km NW of Montesilvano (53738 inhabitants)
62 Km NW of Pescara (121014 inhabitants)
70 Km NE of L'Aquila (69753 inhabitants)
71 Km NW of Chieti (51815 inhabitants)
80 Km S of Ancona (100861 inhabitants)
87 Km E of Foligno (57155 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 2021-10-10
04:55:35		 42.9208 13.7753 28 2022-03-30
13:04:10		 Bollettino Sismico Italiano INGV 96443101
Reviewed
Rev100 		ML 2.0 2021-10-10
04:55:35		 42.9422 13.78 29 2021-10-10
05:02:36		 Sala Sismica INGV-Roma 96398651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-10 04:55:35 ± 0.16
Latitude 42.9208 ± 0.0054
Longitude 13.7753 ± 0.0074
Depth (km) 28 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96443101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 650
Semi-minor axis of confidence ellipse (meter) 321
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 225
Circular confidence region, given by single value of horizontal uncertainty (meter) 650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 181
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.06745
Epicentral distance of station farthest from the epicenter (degree) 0.63852
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 96443101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-11 18:02:11

ML:2.0

Field Value
Value 2.0
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 96398651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-10 05:02:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHE. 2021-10-10T04:55:58.61 0.3 undecidable manual S 310 70.8735 106 0.74 57
IV.RM33.HNE. 2021-10-10T04:55:56.19 0.6 undecidable manual S 225 64.5909 107 -0.07 46
IV.FDMO.HHZ. 2021-10-10T04:55:54.47 0.3 undecidable manual S 283 57.2982 110 0.06 70
IV.PF6.EHN. 2021-10-10T04:55:53.43 0.3 undecidable manual S 297 52.9026 112 0.12 70
IV.NRCA.HHZ. 2021-10-10T04:55:53.77 0.3 undecidable manual S 260 54.6009 111 0.04 70
IV.MC2.EHZ. 2021-10-10T04:55:52.04 0.3 undecidable manual S 269 47.619 114 0.02 71
IV.CSP1.EHZ. 2021-10-10T04:55:52.75 0.3 undecidable manual S 292 50.0166 113 0.15 69
IV.SMA1.EHN. 2021-10-10T04:55:51.93 0.6 undecidable manual S 228 48.2184 114 -0.22 46
IV.GUMA.HNN. 2021-10-10T04:55:50.24 0.3 undecidable manual S 294 39.0276 119 0.28 69
IV.SAP2.EHE. 2021-10-10T04:55:49.54 0.6 undecidable manual S 303 36.2415 122 0.22 47
IV.MMO1.EHZ. 2021-10-10T04:55:49.16 0.3 undecidable manual S 266 36.5412 121 -0.22 70
IV.TERO.HHZ. 2021-10-10T04:55:49.27 0.3 undecidable manual S 203 35.8419 122 0.03 72
IV.MTRA.EHE. 2021-10-10T04:55:49.09 0.3 undecidable manual S 240 35.8419 122 -0.13 72
IV.RM33.HNE. 2021-10-10T04:55:48.06 0.1 undecidable manual P 225 64.5909 107 0.41 85
IV.EL6.EHE. 2021-10-10T04:55:48.50 0.1 undecidable manual P 310 70.8735 106 -0.08 90
IV.MF5.EHZ. 2021-10-10T04:55:47.32 0.3 undecidable manual S 286 26.6511 131 0.06 74
IV.NRCA.HHZ. 2021-10-10T04:55:46.08 0.1 undecidable manual P 260 54.6009 111 -0.11 93
IV.TRTR.HHZ. 2021-10-10T04:55:46.17 0.6 undecidable manual S 138 16.872 145 0.67 42
IV.FDMO.HHZ. 2021-10-10T04:55:46.31 0.1 undecidable manual P 283 57.2982 110 -0.27 89
IV.MNTT.EHZ. 2021-10-10T04:55:46.74 1.0 undecidable manual S 317 21.3675 138 0.48 23
IV.CSP1.EHZ. 2021-10-10T04:55:45.29 0.1 undecidable manual P 292 50.0166 113 -0.24 90
IV.SMA1.EHN. 2021-10-10T04:55:45.20 1.0 undecidable manual P 228 48.2184 114 -0.07 24
IV.PF6.EHN. 2021-10-10T04:55:45.64 0.1 undecidable manual P 297 52.9026 112 -0.31 89
IV.MTRA.EHE. 2021-10-10T04:55:44.03 0.1 undecidable manual P 240 35.8419 122 0.45 89
IV.MC2.EHZ. 2021-10-10T04:55:44.87 0.6 undecidable manual P 269 47.619 114 -0.33 45
IV.OFFI.HHZ. 2021-10-10T04:55:43.86 0.3 undecidable manual S 282 7.4814 163 -0.54 68
IV.SAP2.EHE. 2021-10-10T04:55:43.68 0.3 undecidable manual P 303 36.2415 122 0.04 73
IV.MMO1.EHZ. 2021-10-10T04:55:43.36 0.1 undecidable manual P 266 36.5412 121 -0.32 91
IV.GUMA.HNN. 2021-10-10T04:55:43.97 0.1 undecidable manual P 294 39.0276 119 -0.04 96
IV.TERO.HHZ. 2021-10-10T04:55:43.69 0.1 undecidable manual P 203 35.8419 122 0.09 95
IV.MF5.EHZ. 2021-10-10T04:55:42.44 0.1 undecidable manual P 286 26.6511 131 -0.01 99
IV.MNTT.EHZ. 2021-10-10T04:55:41.88 0.1 undecidable manual P 317 21.3675 138 0.01 100
IV.TRTR.HHZ. 2021-10-10T04:55:41.78 0.1 undecidable manual P 138 16.872 145 0.35 94
IV.OFFI.HHZ. 2021-10-10T04:55:40.33 0.1 undecidable manual P 282 7.4814 163 -0.47 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OFFI.HHE. ML:2.0 0.0005124999999999999 0.28 AML other m 2021-10-10T04:55:44.20
IV.OFFI.HHN. ML:1.9 0.000443 0.74 AML other m 2021-10-10T04:55:45.65
IV.CSP1.EHE. ML:1.6 0.00009079222499999999 0.5184 AML other m 2021-10-10T04:55:53.32
IV.NRCA.HHE. ML:1.2 0.000035041460000000004 0.6624 AML other m 2021-10-10T04:55:55.48
IV.NRCA.HHN. ML:1.1 0.00002517861 0.9184 AML other m 2021-10-10T04:55:54.82
IV.FDMO.HHE. ML:0.9 0.000016156945 0.48 AML other m 2021-10-10T04:55:55.51
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
Waveforms Seismic signals in miniseed + resp format Download