Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 23-01-2021 and time 19:02:16 (Italy) in region 2 km E Urbisaglia (MC)

A magnitude ML 1.7 earthquake occured in region: 2 km E Urbisaglia (MC), on

  • 23-01-2021 18:02:16 (UTC)
  • 23-01-2021 19:02:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1910, 13.4020 at 21 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
Urbisaglia MC 2 2628 2628
Loro Piceno MC 3 2401 5029
Colmurano MC 5 1263 6292
Ripe San Ginesio MC 6 852 7144
Petriolo MC 6 1998 9142
Mogliano MC 6 4696 13838
Massa Fermana FM 7 963 14801
Montappone FM 8 1682 16483
Pollenza MC 10 6618 23101
Tolentino MC 10 20069 43170
Sant'Angelo in Pontano MC 10 1436 44606
Monte Vidon Corrado FM 10 731 45337
Corridonia MC 11 15430 60767
Falerone FM 11 3337 64104
Francavilla d'Ete FM 11 964 65068
San Ginesio MC 11 3498 68566
Camporotondo di Fiastrone MC 13 563 69129
Montegiorgio FM 13 6851 75980
Macerata MC 13 42473 118453
Belforte del Chienti MC 14 1886 120339
Servigliano FM 14 2336 122675
Monte San Pietrangeli FM 14 2458 125133
Gualdo MC 15 815 125948
Cessapalombo MC 15 512 126460
Penna San Giovanni MC 15 1108 127568
Caldarola MC 15 1823 129391
Treia MC 15 9403 138794
Belmonte Piceno FM 16 646 139440
Rapagnano FM 16 2145 141585
Magliano di Tenna FM 16 1452 143037
Monte San Giusto MC 16 8191 151228
Torre San Patrizio FM 17 2048 153276
Serrapetrona MC 17 966 154242
Monte San Martino MC 18 765 155007
Grottazzolina FM 18 3398 158405
Monsampietro Morico FM 19 659 159064
San Severino Marche MC 19 12726 171790
Monteleone di Fermo FM 19 395 172185
Sarnano MC 19 3264 175449
Montegranaro FM 19 12990 188439
Montecassiano MC 20 7125 195564
Appignano MC 20 4213 199777

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km S of Ancona (100861 inhabitants)
62 Km E of Foligno (57155 inhabitants)
64 Km NW of Teramo (54892 inhabitants)
79 Km SE of Fano (60888 inhabitants)
83 Km E of Perugia (166134 inhabitants)
89 Km SE of Pesaro (94582 inhabitants)
93 Km N of L'Aquila (69753 inhabitants)
93 Km NE of Terni (111501 inhabitants)
97 Km NW of Montesilvano (53738 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 1.7 2021-01-23
18:02:16		 43.1908 13.4025 21 2021-07-12
16:54:57		 Bollettino Sismico Italiano INGV 86802721
Reviewed
Rev100 		ML 1.7 2021-01-23
18:02:16		 43.192 13.3957 22 2021-01-23
18:31:30		 Sala Sismica INGV-Roma 86505141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-23 18:02:16 ± 0.16
Latitude 43.1908 ± 0.0063
Longitude 13.4025 ± 0.0074
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86802721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 669
Semi-minor axis of confidence ellipse (meter) 365
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 32
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.45416
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.5
Num. used stations 6
Type of magnitude ML
Reference to an origin 86802721
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-05 16:42:47

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 86505141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-23 18:31:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
AC.KBN.HHZ. 2021-01-23T18:04:00.33 3.0 negative manual Pg 17.309999 0
IV.MAGA.HHZ. 2021-01-23T18:03:59.28 3.0 undecidable manual Sg 19.629999 0
IV.MTGR.HHZ. 2021-01-23T18:03:38.84 3.0 undecidable manual Pn 6.04 0
IV.JOPP.HHZ. 2021-01-23T18:03:29.58 3.0 undecidable manual Pn 1.7 0
IV.VITU.HHZ. 2021-01-23T18:03:18.73 3.0 undecidable manual Sn 0.94 0
IT.FIE.HGZ. 2021-01-23T18:03:10.13 3.0 undecidable manual Sg 9 0
IV.FVI.HHZ. 2021-01-23T18:03:03.22 3.0 undecidable manual Pn -1.55 0
IV.NDIM.HNZ. 2021-01-23T18:03:00.17 3.0 negative manual Pg 8.36 0
IV.POFI.HNZ. 2021-01-23T18:02:58.85 3.0 undecidable manual Sn -1.53 0
IV.MTMR.EHZ. 2021-01-23T18:02:55.40 3.0 undecidable manual Pn 0.3 0
IV.LAV9.HNZ. 2021-01-23T18:02:43.80 3.0 undecidable manual Pn 2.11 0
IV.PE3.EHZ. 2021-01-23T18:02:41.19 3.0 undecidable manual S 0.53 0
IV.GAVE.EHZ. 2021-01-23T18:02:37.58 3.0 undecidable manual S -0.91 0
IV.ARVD.HHE. 2021-01-23T18:02:33.48 0.6 undecidable manual S 313 50.4162 104 1.03 36
IV.NRCA.HHZ. 2021-01-23T18:02:31.62 0.3 undecidable manual S 211 46.0206 106 0.31 67
IV.CESI.HHE. 2021-01-23T18:02:31.92 0.6 undecidable manual S 243 45.3213 106 0.8 38
IV.MMO1.EHZ. 2021-01-23T18:02:27.98 0.6 undecidable manual S 191 32.9448 114 -0.04 49
IV.FDMO.HHZ. 2021-01-23T18:02:27.56 0.3 undecidable manual S 236 30.747 116 0.07 73
IV.CING.HHE. 2021-01-23T18:02:26.61 0.6 undecidable manual S 321 26.4513 120 0.13 49
IV.MNTT.EHZ. 2021-01-23T18:02:26.02 0.1 undecidable manual S 132 21.1677 128 0.71 83
IV.CRTC.HHZ. 2021-01-23T18:02:26.28 3.0 undecidable manual P -0.9 0
IV.MF5.EHN. 2021-01-23T18:02:25.90 0.6 undecidable manual S 168 22.9548 125 0.19 48
IV.ARVD.HHE. 2021-01-23T18:02:25.91 0.3 undecidable manual P 313 50.4162 104 0.33 67
IV.CESI.HHE. 2021-01-23T18:02:24.87 0.1 undecidable manual P 243 45.3213 106 0.06 95
IV.PF6.EHN. 2021-01-23T18:02:24.44 0.6 undecidable manual S 251 17.871 133 -0.19 48
IV.GUMA.HNN. 2021-01-23T18:02:24.19 0.6 undecidable manual S 201 15.2736 139 0.04 50
IV.NRCA.HHZ. 2021-01-23T18:02:24.78 0.1 undecidable manual P 211 46.0206 106 -0.14 93
IV.CSP1.EHZ. 2021-01-23T18:02:24.96 0.3 undecidable manual S 236 19.3695 131 0.01 75
IV.SAP2.EHE. 2021-01-23T18:02:23.42 0.3 undecidable manual S 181 10.4784 150 0.02 76
IV.FDMO.HHZ. 2021-01-23T18:02:22.48 0.1 undecidable manual P 236 30.747 116 -0.23 94
IV.MNTP.HNZ. 2021-01-23T18:02:22.92 0.6 undecidable manual S 138 7.9809 156 -0.18 49
IV.MMO1.EHZ. 2021-01-23T18:02:22.86 0.3 undecidable manual P 191 32.9448 114 -0.16 71
IV.CSP1.EHZ. 2021-01-23T18:02:21.08 0.1 undecidable manual P 236 19.3695 131 -0.17 97
IV.CING.HHE. 2021-01-23T18:02:21.99 0.1 undecidable manual P 321 26.4513 120 -0.14 95
IV.MF5.EHN. 2021-01-23T18:02:21.58 0.1 undecidable manual P 168 22.9548 125 -0.1 98
IV.MNTT.EHZ. 2021-01-23T18:02:21.47 0.1 negative manual P 132 21.1677 128 0.01 100
IV.SAP2.EHE. 2021-01-23T18:02:20.10 0.1 undecidable manual P 181 10.4784 150 -0.25 97
IV.PF6.EHN. 2021-01-23T18:02:20.82 0.3 undecidable manual P 251 17.871 133 -0.25 71
IV.GUMA.HNN. 2021-01-23T18:02:20.73 0.3 undecidable manual P 201 15.2736 139 -0.05 75
IV.MNTP.HNZ. 2021-01-23T18:02:19.77 0.1 undecidable manual P 138 7.9809 156 -0.41 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MNTT.EHE. ML:2.6 0.00203 0.16 AML other m 2021-01-23T18:02:27.18
IV.MNTT.EHN. ML:2.2 0.0008895 0.18 AML other m 2021-01-23T18:02:27.18
IV.FDMO.HHE. ML:1.2 0.00005394725 0.1536 AML other m 2021-01-23T18:02:27.83
IV.NRCA.HNE. ML:1.8 0.00017454125 0.4288 AML other m 2021-01-23T18:02:30.66
IV.NRCA.HHN. ML:1.3 0.000054645015000000004 0.0416 AML other m 2021-01-23T18:02:33.54
IV.NRCA.HHE. ML:1.6 0.00010911570000000001 0.4416 AML other m 2021-01-23T18:02:34.24
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