Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 21-11-2021 and time 08:59:58 (Italy) in region 2 km W Gualdo (MC)

A magnitude ML 1.2 earthquake occured in region: 2 km W Gualdo (MC), on

  • 21-11-2021 07:59:58 (UTC)
  • 21-11-2021 08:59:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0630, 13.3110 at 24 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
Gualdo MC 2 815 815
Sarnano MC 3 3264 4079
San Ginesio MC 5 3498 7577
Cessapalombo MC 7 512 8089
Sant'Angelo in Pontano MC 8 1436 9525
Camporotondo di Fiastrone MC 9 563 10088
Penna San Giovanni MC 9 1108 11196
Amandola FM 10 3629 14825
Ripe San Ginesio MC 10 852 15677
Bolognola MC 10 142 15819
Caldarola MC 11 1823 17642
Monte San Martino MC 11 765 18407
Acquacanina MC 12 121 18528
Colmurano MC 12 1263 19791
Belforte del Chienti MC 13 1886 21677
Fiastra MC 13 559 22236
Smerillo FM 13 365 22601
Montefortino FM 14 1178 23779
Falerone FM 14 3337 27116
Comunanza AP 14 3166 30282
Loro Piceno MC 14 2401 32683
Montefalcone Appennino FM 15 424 33107
Servigliano FM 15 2336 35443
Montappone FM 15 1682 37125
Monte Vidon Corrado FM 16 731 37856
Santa Vittoria in Matenano FM 16 1330 39186
Urbisaglia MC 16 2628 41814
Serrapetrona MC 16 966 42780
Tolentino MC 16 20069 62849
Massa Fermana FM 17 963 63812
Monteleone di Fermo FM 18 395 64207
Fiordimonte MC 18 202 64409
Montemonaco AP 18 604 65013
Pievebovigliana MC 18 866 65879
Force AP 18 1354 67233
Belmonte Piceno FM 19 646 67879
Montelparo FM 19 778 68657
Ussita MC 19 444 69101
Mogliano MC 20 4696 73797

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km E of Foligno (57155 inhabitants)
55 Km NW of Teramo (54892 inhabitants)
64 Km S of Ancona (100861 inhabitants)
75 Km E of Perugia (166134 inhabitants)
78 Km NE of Terni (111501 inhabitants)
79 Km N of L'Aquila (69753 inhabitants)
90 Km S of Fano (60888 inhabitants)
92 Km NW of Montesilvano (53738 inhabitants)
99 Km NW of Pescara (121014 inhabitants)
100 Km SE of Pesaro (94582 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 1.2 2021-11-21
07:59:58		 43.0633 13.3107 24 2021-11-21
08:06:59		 Sala Sismica INGV-Roma 97649121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-21 07:59:58 ± 0.17
Latitude 43.0633 ± 0.0081
Longitude 13.3107 ± 0.0086
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97649121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 851
Semi-minor axis of confidence ellipse (meter) 520
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
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) 0.01799
Epicentral distance of station farthest from the epicenter (degree) 0.47664
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 20
Type of magnitude ML
Reference to an origin 97649121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-21 08:06:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2021-11-21T08:00:16.13 0.6 undecidable manual S 268 52.9026 107 0.56 43
IV.CESI.HHZ. 2021-11-21T08:00:11.23 0.3 undecidable manual S 259 33.5442 118 0.44 68
IV.CING.HHZ. 2021-11-21T08:00:11.33 0.6 undecidable manual S 345 35.8419 116 -0.01 49
IV.EL6.EHZ. 2021-11-21T08:00:11.18 0.3 undecidable manual S 330 34.0437 118 0.28 70
IV.MML1.EHZ. 2021-11-21T08:00:09.64 0.3 undecidable manual S 282 28.0497 124 0.12 74
IV.ASSB.HHZ. 2021-11-21T08:00:08.27 0.1 negative manual P 268 52.9026 107 -0.09 94
IV.FDMO.HHZ. 2021-11-21T08:00:07.24 0.3 undecidable manual S 261 18.3705 137 -0.31 72
IV.MMO1.EHE. 2021-11-21T08:00:07.38 0.3 undecidable manual S 176 18.2706 137 -0.15 75
IV.MF5.EHE. 2021-11-21T08:00:07.26 0.3 undecidable manual S 125 14.6742 144 0.33 71
IV.CSP1.EHZ. 2021-11-21T08:00:05.85 0.3 undecidable manual S 290 9.1797 156 -0.34 73
IV.GUMA.HNN. 2021-11-21T08:00:05.74 0.3 undecidable manual S 92 1.998 175 0.04 77
IV.EL6.EHZ. 2021-11-21T08:00:05.63 0.6 negative manual P 330 34.0437 118 -0.02 49
IV.CESI.HHZ. 2021-11-21T08:00:05.67 1.0 positive manual P 259 33.5442 118 0.08 24
IV.CING.HHZ. 2021-11-21T08:00:05.80 0.6 undecidable manual P 345 35.8419 116 -0.11 48
IV.MML1.EHZ. 2021-11-21T08:00:04.82 0.6 negative manual P 282 28.0497 124 -0.04 50
IV.MF5.EHE. 2021-11-21T08:00:03.51 0.3 undecidable manual P 125 14.6742 144 0.14 74
IV.FDMO.HHZ. 2021-11-21T08:00:03.54 0.3 negative manual P 261 18.3705 137 -0.18 74
IV.MMO1.EHE. 2021-11-21T08:00:03.54 0.6 undecidable manual P 176 18.2706 137 -0.17 50
IV.CSP1.EHZ. 2021-11-21T08:00:02.76 0.1 negative manual P 290 9.1797 156 -0.18 100
IV.GUMA.HNN. 2021-11-21T08:00:02.57 0.3 undecidable manual P 92 1.998 175 -0.09 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.1 0.00006335 0.18 AML other m 2021-11-21T08:00:07.46
IV.FDMO.HHN. ML:0.9 0.0000404 0.2 AML other m 2021-11-21T08:00:08.12
IV.MML1.EHN. ML:1.3 0.00007250388500000001 0.1792 AML other m 2021-11-21T08:00:09.97
IV.MML1.EHE. ML:0.9 0.00003485 1.36 AML other m 2021-11-21T08:00:10.87
IV.CESI.HHE. ML:0.9 0.000026123594999999998 0.1792 AML other m 2021-11-21T08:00:11.66
IV.CESI.HHN. ML:1.1 0.00004165 0.16 AML other m 2021-11-21T08:00:11.68
IV.CING.HHN. ML:0.8 0.00002105 0.28 AML other m 2021-11-21T08:00:11.82
IV.CING.HHE. ML:0.8 0.000022283875 0.1984 AML other m 2021-11-21T08:00:11.78
IV.ASSB.HHE. ML:0.8 0.000015095421000000002 0.096 AML other m 2021-11-21T08:00:17.35
IV.ASSB.HHN. ML:1.1 0.00002615 0.98 AML other m 2021-11-21T08:00:17.28
IV.CSP1.EHE. ML:1.3 0.00013668429 0.0832 AML other m 2021-11-21T08:00:06.21
IV.CSP1.EHN. ML:1.4 0.00014487129999999997 0.1024 AML other m 2021-11-21T08:00:06.06
IV.MML1.HNE. ML:1.4 0.000112376155 0.9152 AML other m 2021-11-21T08:00:07.77
IV.MML1.HNN. ML:1.5 0.00013269049999999999 0.9536 AML other m 2021-11-21T08:00:06.80
IV.EL6.EHE. ML:1.0 0.00003303074635 0.1856 AML other m 2021-11-21T08:00:12.09
IV.EL6.EHN. ML:1.2 0.000052386535 0.096 AML other m 2021-11-21T08:00:12.27
IV.CESI.HNE. ML:1.5 0.0001097480305 0.7296 AML other m 2021-11-21T08:00:09.91
IV.CESI.HNN. ML:1.6 0.00015055000000000003 0.8192 AML other m 2021-11-21T08:00:24.57
IV.CING.HNE. ML:3.2 0.0056102734999999996 0.544 AML other m 2021-11-21T08:00:25.64
IV.CING.HNN. ML:3.2 0.005160359 0.7616 AML other m 2021-11-21T08:00:07.86
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