Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 21-12-2021 and time 03:45:07 (UTC) in region 3 km SE Tolentino (MC)

A magnitude ML 1.6 earthquake occured in region: 3 km SE Tolentino (MC), on

  • 21-12-2021 03:45:07 (UTC)
  • 21-12-2021 04:45:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1860, 13.3080 at 26 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
Tolentino MC 3 20069 20069
Colmurano MC 5 1263 21332
Urbisaglia MC 6 2628 23960
Belforte del Chienti MC 6 1886 25846
Ripe San Ginesio MC 7 852 26698
Camporotondo di Fiastrone MC 7 563 27261
Caldarola MC 8 1823 29084
San Ginesio MC 9 3498 32582
Loro Piceno MC 9 2401 34983
Cessapalombo MC 9 512 35495
Serrapetrona MC 10 966 36461
Pollenza MC 10 6618 43079
San Severino Marche MC 12 12726 55805
Sant'Angelo in Pontano MC 12 1436 57241
Petriolo MC 13 1998 59239
Gualdo MC 13 815 60054
Treia MC 14 9403 69457
Mogliano MC 14 4696 74153
Massa Fermana FM 14 963 75116
Montappone FM 14 1682 76798
Monte Vidon Corrado FM 16 731 77529
Falerone FM 16 3337 80866
Sarnano MC 17 3264 84130
Penna San Giovanni MC 17 1108 85238
Macerata MC 17 42473 127711
Corridonia MC 18 15430 143141
Francavilla d'Ete FM 19 964 144105
Servigliano FM 19 2336 146441
Montegiorgio FM 20 6851 153292

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km SW of Ancona (100861 inhabitants)
55 Km E of Foligno (57155 inhabitants)
67 Km NW of Teramo (54892 inhabitants)
75 Km E of Perugia (166134 inhabitants)
77 Km SE of Fano (60888 inhabitants)
87 Km SE of Pesaro (94582 inhabitants)
88 Km NE of Terni (111501 inhabitants)
93 Km N of L'Aquila (69753 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 1.6 2021-12-21
03:45:07		 43.1863 13.3082 26 2022-03-30
13:04:31		 Bollettino Sismico Italiano INGV 99869391
Reviewed
Rev100 		ML 1.5 2021-12-21
03:45:07		 43.1827 13.2893 24 2021-12-21
03:51:14		 Sala Sismica INGV-Roma 98776071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-21 03:45:07 ± 0.14
Latitude 43.1863 ± 0.0054
Longitude 13.3082 ± 0.0074
Depth (km) 26 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99869391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 685
Semi-minor axis of confidence ellipse (meter) 138
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 36
Circular confidence region, given by single value of horizontal uncertainty (meter) 680.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.09623
Epicentral distance of station farthest from the epicenter (degree) 0.45686
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 98776071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-21 03:51:14

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 99869391
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-06 09:24:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2021-12-21T03:45:25.36 0.6 undecidable manual S 303 50.7159 111 1.09 35
IV.NRCA.HHZ. 2021-12-21T03:45:22.29 0.6 undecidable manual S 202 42.2244 115 0.11 47
IV.CESI.HHZ. 2021-12-21T03:45:21.61 0.6 undecidable manual S 238 38.4282 118 0.34 46
IV.MC2.EHZ. 2021-12-21T03:45:20.00 0.6 undecidable manual S 198 32.0457 123 0.2 47
IV.MNTT.EHZ. 2021-12-21T03:45:19.63 0.6 undecidable manual S 121 27.0507 128 0.9 37
IV.MML1.EHZ. 2021-12-21T03:45:19.37 0.3 undecidable manual S 254 28.3494 127 0.36 69
IV.SNTG.HHZ. 2021-12-21T03:45:19.73 0.6 undecidable manual S 284 30.6471 124 0.23 48
IV.MMO1.EHZ. 2021-12-21T03:45:19.73 0.6 undecidable manual S 177 31.8459 123 -0.04 49
IV.MF5.EHZ. 2021-12-21T03:45:18.84 0.3 undecidable manual S 151 25.2525 130 0.49 66
IV.FDMO.HHZ. 2021-12-21T03:45:18.05 0.6 undecidable manual S 227 24.4533 131 -0.13 49
IV.EL6.EHZ. 2021-12-21T03:45:18.07 0.6 undecidable manual S 314 22.9548 133 0.17 49
IV.SSFR.HHZ. 2021-12-21T03:45:17.56 0.1 undecidable manual P 303 50.7159 111 0.35 90
IV.CING.HHZ. 2021-12-21T03:45:17.83 0.6 undecidable manual S 337 22.8549 134 -0.05 49
IV.CSP1.EHZ. 2021-12-21T03:45:16.16 0.6 undecidable manual S 219 13.3755 149 -0.13 50
IV.GUMA.HNN. 2021-12-21T03:45:16.38 0.3 undecidable manual S 171 13.875 148 0.02 76
IV.SAP2.EHE. 2021-12-21T03:45:16.17 0.6 undecidable manual S 143 12.3765 151 0.01 51
IV.MNTP.HNZ. 2021-12-21T03:45:16.50 0.6 undecidable manual S 113 14.1747 148 0.11 50
IV.ARVD.HHZ. 2021-12-21T03:45:16.55 0.3 undecidable manual P 320 45.5211 113 0.08 72
IV.NRCA.HHZ. 2021-12-21T03:45:15.74 0.3 undecidable manual P 202 42.2244 115 -0.26 69
IV.CESI.HHZ. 2021-12-21T03:45:15.47 0.1 negative manual P 238 38.4282 118 -0.01 97
IV.PF6.EHN. 2021-12-21T03:45:15.44 0.3 undecidable manual S 240 10.6782 155 -0.51 69
IV.SNTG.HHZ. 2021-12-21T03:45:14.43 0.3 undecidable manual P 284 30.6471 124 -0.03 73
IV.MMO1.EHZ. 2021-12-21T03:45:14.31 0.1 positive manual P 177 31.8459 123 -0.3 93
IV.MNTT.EHZ. 2021-12-21T03:45:14.23 0.1 positive manual P 121 27.0507 128 0.22 95
IV.MC2.EHZ. 2021-12-21T03:45:14.51 0.1 undecidable manual P 198 32.0457 123 -0.12 97
IV.MML1.EHZ. 2021-12-21T03:45:14.08 0.1 undecidable manual P 254 28.3494 127 -0.09 97
IV.EL6.EHZ. 2021-12-21T03:45:13.55 0.1 undecidable manual P 314 22.9548 133 0.01 100
IV.MF5.EHZ. 2021-12-21T03:45:13.79 0.1 positive manual P 151 25.2525 130 0 100
IV.CING.HHZ. 2021-12-21T03:45:13.39 0.1 positive manual P 337 22.8549 134 -0.13 97
IV.FDMO.HHZ. 2021-12-21T03:45:13.47 0.1 negative manual P 227 24.4533 131 -0.23 96
IV.PF6.EHN. 2021-12-21T03:45:12.04 0.1 negative manual P 240 10.6782 155 -0.37 95
IV.SAP2.EHE. 2021-12-21T03:45:12.50 0.3 undecidable manual P 143 12.3765 151 -0.03 77
IV.MNTP.HNZ. 2021-12-21T03:45:12.44 0.3 undecidable manual P 113 14.1747 148 -0.22 73
IV.CSP1.EHZ. 2021-12-21T03:45:12.39 0.1 negative manual P 219 13.3755 149 -0.22 98
IV.GUMA.HNN. 2021-12-21T03:45:12.50 0.1 undecidable manual P 171 13.875 148 -0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.EHN. ML:1.5 0.00011180000000000001 0.2 AML other m 2021-12-21T03:45:19.59
IV.MML1.EHE. ML:1.4 0.00008655 0.2 AML other m 2021-12-21T03:45:19.69
IV.MMO1.EHE. ML:1.7 0.00017199999999999998 0.24 AML other m 2021-12-21T03:45:19.99
IV.MMO1.EHN. ML:1.7 0.00016849999999999998 0.34 AML other m 2021-12-21T03:45:20.18
IV.MC2.EHE. ML:1.9 0.000261 0.26 AML other m 2021-12-21T03:45:20.40
IV.MC2.EHN. ML:2.0 0.000352 0.26 AML other m 2021-12-21T03:45:20.36
IV.NRCA.HHE. ML:1.5 0.00008925 0.94 AML other m 2021-12-21T03:45:22.01
IV.NRCA.HHN. ML:1.5 0.0000816 1.88 AML other m 2021-12-21T03:45:23.94
IV.SSFR.HHN. ML:1.4 0.000050499999999999994 0.6 AML other m 2021-12-21T03:45:27.04
IV.SSFR.HHE. ML:1.4 0.00005545 0.42 AML other m 2021-12-21T03:45:27.56
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