Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 20-11-2021 and time 21:32:28 (UTC) in region 3 km S Servigliano (FM)

A magnitude ML 1.0 earthquake occured in region: 3 km S Servigliano (FM), on

  • 20-11-2021 21:32:28 (UTC)
  • 20-11-2021 22:32:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0540, 13.4830 at 16 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.

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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
Servigliano FM 3 2336 2336
Monteleone di Fermo FM 4 395 2731
Santa Vittoria in Matenano FM 4 1330 4061
Monte San Martino MC 4 765 4826
Penna San Giovanni MC 5 1108 5934
Montelparo FM 6 778 6712
Falerone FM 6 3337 10049
Smerillo FM 6 365 10414
Monsampietro Morico FM 6 659 11073
Belmonte Piceno FM 6 646 11719
Montefalcone Appennino FM 8 424 12143
Monte Vidon Corrado FM 8 731 12874
Montottone FM 8 979 13853
Monte Rinaldo FM 9 379 14232
Sant'Angelo in Pontano MC 9 1436 15668
Montappone FM 9 1682 17350
Montegiorgio FM 10 6851 24201
Force AP 10 1354 25555
Ortezzano FM 10 774 26329
Massa Fermana FM 11 963 27292
Grottazzolina FM 12 3398 30690
Gualdo MC 12 815 31505
Comunanza AP 12 3166 34671
Monte Vidon Combatte FM 12 433 35104
Montedinove AP 13 488 35592
Montalto delle Marche AP 13 2122 37714
Magliano di Tenna FM 13 1452 39166
Rotella AP 13 906 40072
Monte Giberto FM 13 801 40873
Amandola FM 13 3629 44502
Loro Piceno MC 14 2401 46903
Ripe San Ginesio MC 14 852 47755
Petritoli FM 14 2335 50090
San Ginesio MC 15 3498 53588
Mogliano MC 15 4696 58284
Sarnano MC 15 3264 61548
Rapagnano FM 15 2145 63693
Ponzano di Fermo FM 15 1674 65367
Francavilla d'Ete FM 16 964 66331
Colmurano MC 16 1263 67594
Carassai AP 17 1100 68694
Montefortino FM 17 1178 69872
Castignano AP 17 2796 72668
Palmiano AP 17 196 72864
Monte San Pietrangeli FM 17 2458 75322
Torre San Patrizio FM 18 2048 77370
Urbisaglia MC 18 2628 79998
Cossignano AP 18 978 80976
Petriolo MC 19 1998 82974
Venarotta AP 19 2066 85040
Cessapalombo MC 19 512 85552
Monterubbiano FM 19 2230 87782
Camporotondo di Fiastrone MC 20 563 88345

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km NW of Teramo (54892 inhabitants)
63 Km S of Ancona (100861 inhabitants)
64 Km E of Foligno (57155 inhabitants)
78 Km N of L'Aquila (69753 inhabitants)
81 Km NW of Montesilvano (53738 inhabitants)
87 Km NE of Terni (111501 inhabitants)
89 Km NW of Pescara (121014 inhabitants)
89 Km E of Perugia (166134 inhabitants)
96 Km SE of Fano (60888 inhabitants)
96 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
Reviewed
Rev100 		ML 1.0 2021-11-20
21:32:28		 43.054 13.4833 16 2021-11-20
21:42:57		 Sala Sismica INGV-Roma 97640711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-20 21:32:28 ± 0.18
Latitude 43.0540 ± 0.0054
Longitude 13.4833 ± 0.0074
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97640711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 552
Semi-minor axis of confidence ellipse (meter) 399
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 219
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 17
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39120
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 97640711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-20 21:42:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-11-20T21:32:43.07 0.3 undecidable manual S 315 43.4232 99 0.1 71
IV.MOMA.HHZ. 2021-11-20T21:32:42.12 3.0 undecidable manual P -0.64 0
IV.NRCA.HHZ. 2021-11-20T21:32:42.16 0.6 undecidable manual S 231 38.628 100 0.43 44
IV.MC2.EHZ. 2021-11-20T21:32:39.27 0.6 undecidable manual S 237 28.6491 106 0.16 47
IV.EL6.EHZ. 2021-11-20T21:32:37.50 1.0 undecidable manual P 315 43.4232 99 0.51 22
IV.CSP1.EHZ. 2021-11-20T21:32:37.21 0.6 undecidable manual S 281 22.9548 112 -0.46 46
IV.NRCA.HHZ. 2021-11-20T21:32:36.30 0.3 negative manual P 231 38.628 100 0.02 72
IV.GUMA.HHE. 2021-11-20T21:32:35.47 0.3 undecidable manual S 275 12.0768 134 0.26 72
IV.MNTT.EHZ. 2021-11-20T21:32:34.83 0.6 undecidable manual S 84 9.1797 144 0.12 50
IV.MNTP.HNN. 2021-11-20T21:32:34.88 0.6 undecidable manual S 353 9.2796 143 0.15 50
IV.OFFI.HHZ. 2021-11-20T21:32:34.32 1.0 negative manual P 129 21.0678 115 0.65 22
IV.MF5.EHZ. 2021-11-20T21:32:34.29 0.6 undecidable manual S 195 7.5813 149 -0.18 50
IV.MC2.EHZ. 2021-11-20T21:32:34.67 1.0 positive manual P 237 28.6491 106 -0.09 24
IV.CSP1.EHZ. 2021-11-20T21:32:33.74 0.3 positive manual P 281 22.9548 112 -0.19 72
IV.GUMA.HHE. 2021-11-20T21:32:32.40 0.1 undecidable manual P 275 12.0768 134 -0.12 99
IV.MNTT.EHZ. 2021-11-20T21:32:32.16 0.1 undecidable manual P 84 9.1797 144 -0.06 100
IV.MNTP.HNN. 2021-11-20T21:32:32.08 0.1 undecidable manual P 353 9.2796 143 -0.16 98
IV.MF5.EHZ. 2021-11-20T21:32:31.97 0.1 positive manual P 195 7.5813 149 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MF5.EHN. ML:1.0 0.00009615 0.26 AML other m 2021-11-20T21:32:34.70
IV.MF5.EHE. ML:0.8 0.0000666 0.1 AML other m 2021-11-20T21:32:34.62
IV.MNTT.EHN. ML:1.6 0.000404 0.18 AML other m 2021-11-20T21:32:35.17
IV.MNTT.EHE. ML:1.4 0.0002635 0.5 AML other m 2021-11-20T21:32:35.73
IV.NRCA.HHN. ML:0.9 0.00002295 0.86 AML other m 2021-11-20T21:32:43.12
IV.NRCA.HHE. ML:1.0 0.00003175 0.72 AML other m 2021-11-20T21:32:43.79
IV.CSP1.EHE. ML:0.9 0.000044941825000000006 0.2432 AML other m 2021-11-20T21:32:38.16
IV.CSP1.EHN. ML:0.8 0.000033650985 0.4224 AML other m 2021-11-20T21:32:37.80
IV.MC2.EHE. ML:1.0 0.000050040250000000006 0.3328 AML other m 2021-11-20T21:32:39.66
IV.MC2.EHN. ML:0.9 0.00003585746 0.2816 AML other m 2021-11-20T21:32:39.50
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