Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 20-04-2021 and time 19:38:06 (Italy) in region 2 km E San Ginesio (MC)

A magnitude ML 1.6 earthquake occured in region: 2 km E San Ginesio (MC), on

  • 20-04-2021 17:38:06 (UTC)
  • 20-04-2021 19:38:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0990, 13.3440 at 22 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
San Ginesio MC 2 3498 3498
Gualdo MC 4 815 4313
Sant'Angelo in Pontano MC 4 1436 5749
Ripe San Ginesio MC 5 852 6601
Cessapalombo MC 7 512 7113
Camporotondo di Fiastrone MC 7 563 7676
Colmurano MC 7 1263 8939
Sarnano MC 8 3264 12203
Penna San Giovanni MC 8 1108 13311
Loro Piceno MC 10 2401 15712
Caldarola MC 10 1823 17535
Falerone FM 11 3337 20872
Monte San Martino MC 11 765 21637
Montappone FM 11 1682 23319
Belforte del Chienti MC 11 1886 25205
Urbisaglia MC 11 2628 27833
Monte Vidon Corrado FM 12 731 28564
Servigliano FM 12 2336 30900
Massa Fermana FM 12 963 31863
Amandola FM 13 3629 35492
Tolentino MC 13 20069 55561
Smerillo FM 13 365 55926
Bolognola MC 15 142 56068
Mogliano MC 15 4696 60764
Serrapetrona MC 15 966 61730
Santa Vittoria in Matenano FM 15 1330 63060
Montefalcone Appennino FM 16 424 63484
Acquacanina MC 16 121 63605
Belmonte Piceno FM 16 646 64251
Monteleone di Fermo FM 16 395 64646
Montegiorgio FM 16 6851 71497
Fiastra MC 17 559 72056
Comunanza AP 17 3166 75222
Petriolo MC 17 1998 77220
Montefortino FM 17 1178 78398
Monsampietro Morico FM 18 659 79057
Montelparo FM 18 778 79835
Pollenza MC 19 6618 86453
Francavilla d'Ete FM 19 964 87417
Force AP 19 1354 88771
San Severino Marche MC 20 12726 101497

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km E of Foligno (57155 inhabitants)
57 Km NW of Teramo (54892 inhabitants)
59 Km S of Ancona (100861 inhabitants)
78 Km E of Perugia (166134 inhabitants)
82 Km NE of Terni (111501 inhabitants)
83 Km N of L'Aquila (69753 inhabitants)
87 Km SE of Fano (60888 inhabitants)
93 Km NW of Montesilvano (53738 inhabitants)
97 Km SE of Pesaro (94582 inhabitants)
100 Km NW of Pescara (121014 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 2021-04-20
17:38:06		 43.0993 13.3435 22 2021-07-12
16:55:15		 Bollettino Sismico Italiano INGV 91375871
Reviewed
Rev100 		ML 1.6 2021-04-20
17:38:06		 43.0935 13.3517 23 2021-04-20
17:42:12		 Sala Sismica INGV-Roma 89301271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-20 17:38:06 ± 0.11
Latitude 43.0993 ± 0.0036
Longitude 13.3435 ± 0.0062
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91375871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 516
Semi-minor axis of confidence ellipse (meter) 162
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 241
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52341
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 19
Type of magnitude ML
Reference to an origin 91375871
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-16 08:17:11

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 22
Type of magnitude ML
Reference to an origin 89301271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-20 17:42:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRTC.HHZ. 2021-04-20T17:38:34.17 3.0 undecidable manual S 0.13 0
IV.EL6.EHZ. 2021-04-20T17:38:19.20 0.3 undecidable manual S 323 32.1456 117 0.55 65
IV.NRCA.HHZ. 2021-04-20T17:38:19.55 0.3 undecidable manual S 212 34.8429 115 0.25 69
IV.CING.HNZ. 2021-04-20T17:38:19.11 0.3 undecidable manual S 339 32.9448 117 0.28 69
IV.MC2.EHZ. 2021-04-20T17:38:17.19 0.3 undecidable manual S 211 24.3534 126 0.32 69
IV.ATCC.EHZ. 2021-04-20T17:38:17.44 0.3 undecidable manual P 280 57.6978 104 0.07 69
IV.GAVE.EHZ. 2021-04-20T17:38:17.49 0.6 undecidable manual P 219 58.0974 104 0.06 46
IV.ASSB.HHZ. 2021-04-20T17:38:17.07 0.1 undecidable manual P 264 55.7997 105 -0.02 92
IV.MMO1.EHZ. 2021-04-20T17:38:16.28 0.3 undecidable manual S 183 22.2555 129 -0.14 72
IV.SMA1.EHZ. 2021-04-20T17:38:16.01 0.3 undecidable manual P 181 52.0035 106 -0.51 63
IV.FDMO.HHZ. 2021-04-20T17:38:16.52 0.3 undecidable manual S 252 21.867 129 0.16 72
IV.AOI.HHE. 2021-04-20T17:38:16.48 1.0 undecidable manual P 23 54.2013 105 -0.37 22
IV.MNTT.EHZ. 2021-04-20T17:38:16.70 0.3 undecidable manual S 101 20.868 131 0.56 65
IV.MF5.EHZ. 2021-04-20T17:38:15.27 0.3 undecidable manual S 143 15.5733 140 0.12 73
IV.CESI.HHZ. 2021-04-20T17:38:14.54 0.1 negative manual P 254 37.1295 113 0.19 93
IV.PF6.EHN. 2021-04-20T17:38:14.43 0.3 undecidable manual S 290 12.7761 146 -0.29 71
IV.CSP1.EHZ. 2021-04-20T17:38:14.70 0.3 undecidable manual S 266 11.2776 150 0.2 72
IV.NRCA.HHZ. 2021-04-20T17:38:13.99 0.1 positive manual P 212 34.8429 115 -0.05 96
IV.SAP2.EHE. 2021-04-20T17:38:13.59 0.3 undecidable manual S 94 4.4955 167 -0.24 73
IV.CING.HNZ. 2021-04-20T17:38:13.63 0.3 undecidable manual P 339 32.9448 117 -0.14 71
IV.GUMA.HHZ. 2021-04-20T17:38:13.83 0.6 undecidable manual S 189 4.0959 168 0.02 50
IV.EL6.EHZ. 2021-04-20T17:38:13.65 0.1 undecidable manual P 323 32.1456 117 -0.01 96
IV.FDMO.HHZ. 2021-04-20T17:38:12.33 0.1 negative manual P 252 21.867 129 -0.01 99
IV.MNTT.EHZ. 2021-04-20T17:38:12.34 0.1 negative manual P 101 20.868 131 0.13 96
IV.MC2.EHZ. 2021-04-20T17:38:12.64 0.1 undecidable manual P 211 24.3534 126 0.01 98
IV.MMO1.EHZ. 2021-04-20T17:38:12.11 0.1 undecidable manual P 183 22.2555 129 -0.27 94
IV.PF6.EHN. 2021-04-20T17:38:11.11 0.3 undecidable manual P 290 12.7761 146 -0.28 71
IV.CSP1.EHZ. 2021-04-20T17:38:11.23 0.1 negative manual P 266 11.2776 150 -0.03 100
IV.MF5.EHZ. 2021-04-20T17:38:11.61 0.1 undecidable manual P 143 15.5733 140 -0.03 100
IV.GUMA.HHZ. 2021-04-20T17:38:10.77 0.6 positive manual P 189 4.0959 168 -0.09 50
IV.SAP2.EHE. 2021-04-20T17:38:10.42 0.1 undecidable manual P 94 4.4955 167 -0.45 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUMA.HHE. ML:1.6 0.00028100000000000005 1.76 AML other m 2021-04-20T17:38:13.06
IV.GUMA.HHN. ML:1.5 0.000224 0.26 AML other m 2021-04-20T17:38:14.02
IV.CSP1.EHE. ML:2.0 0.0006995 0.16 AML other m 2021-04-20T17:38:14.78
IV.CSP1.EHN. ML:2.0 0.0006855 0.34 AML other m 2021-04-20T17:38:14.78
IV.MF5.EHN. ML:1.8 0.00039549999999999996 0.78 AML other m 2021-04-20T17:38:15.45
IV.MF5.EHE. ML:1.8 0.00035250000000000006 0.18 AML other m 2021-04-20T17:38:15.53
IV.FDMO.HHE. ML:1.7 0.00023799999999999998 0.2 AML other m 2021-04-20T17:38:16.82
IV.FDMO.HHN. ML:1.2 0.00008307061999999999 0.2176 AML other m 2021-04-20T17:38:16.77
IV.EL6.EHE. ML:1.8 0.000253 0.22 AML other m 2021-04-20T17:38:19.40
IV.NRCA.HHN. ML:1.8 0.00020150000000000002 0.22 AML other m 2021-04-20T17:38:19.80
IV.NRCA.HHE. ML:2.0 0.000376 0.2 AML other m 2021-04-20T17:38:19.81
IV.EL6.EHN. ML:2.0 0.000383 0.18 AML other m 2021-04-20T17:38:19.87
IV.CESI.HHN. ML:1.4 0.00008415 0.9 AML other m 2021-04-20T17:38:21.61
IV.CESI.HHE. ML:1.1 0.00004675 0.6 AML other m 2021-04-20T17:38:22.68
IV.ASSB.HHE. ML:1.2 0.0000331 0.2 AML other m 2021-04-20T17:38:26.48
IV.ATCC.EHN. ML:1.2 0.00003525 0.76 AML other m 2021-04-20T17:38:26.54
IV.ASSB.HHN. ML:1.2 0.00003235000000000001 0.44 AML other m 2021-04-20T17:38:26.76
IV.ATCC.EHE. ML:1.3 0.0000381 1.42 AML other m 2021-04-20T17:38:27.72
IV.GUMA.HNN. ML:1.6 0.00027173625 0.1792 AML other m 2021-04-20T17:38:14.01
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