Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 05-02-2021 and time 00:16:06 (Italy) in region 4 km S Bolognola (MC)

A magnitude ML 1.7 earthquake occured in region: 4 km S Bolognola (MC), on

  • 04-02-2021 23:16:06 (UTC)
  • 05-02-2021 00:16:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9560, 13.2270 at 8 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
Bolognola MC 4 142 142
Ussita MC 7 444 586
Castelsantangelo sul Nera MC 9 281 867
Acquacanina MC 9 121 988
Montefortino FM 9 1178 2166
Montemonaco AP 10 604 2770
Fiastra MC 11 559 3329
Sarnano MC 11 3264 6593
Amandola FM 11 3629 10222
Visso MC 12 1107 11329
Fiordimonte MC 14 202 11531
Montegallo AP 15 523 12054
Comunanza AP 15 3166 15220
Gualdo MC 16 815 16035
Pievebovigliana MC 17 866 16901
Pieve Torina MC 17 1458 18359
Cessapalombo MC 17 512 18871
Preci PG 18 724 19595
San Ginesio MC 19 3498 23093
Smerillo FM 19 365 23458
Monte Cavallo MC 19 145 23603
Monte San Martino MC 19 765 24368
Montefalcone Appennino FM 19 424 24792
Penna San Giovanni MC 20 1108 25900
Camporotondo di Fiastrone MC 20 563 26463
Palmiano AP 20 196 26659

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
51 Km NW of Teramo (54892 inhabitants)
65 Km NE of Terni (111501 inhabitants)
69 Km N of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
90 Km NW of Montesilvano (53738 inhabitants)
97 Km NW of Pescara (121014 inhabitants)
100 Km S of Fano (60888 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 2021-02-04
23:16:06		 42.9557 13.2273 8 2021-07-12
16:55:01		 Bollettino Sismico Italiano INGV 87964831
Reviewed
Rev100 		ML 1.8 2021-02-04
23:16:06		 42.9557 13.2248 9 2021-02-04
23:29:37		 Sala Sismica INGV-Roma 86838341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-04 23:16:06 ± 0.04
Latitude 42.9557 ± 0.0027
Longitude 13.2273 ± 0.0037
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87964831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 236
Semi-minor axis of confidence ellipse (meter) 216
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 39
Number of associated phases, regardless of their use for origin computation 69
Number of defining phases 69
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.05216
Epicentral distance of station farthest from the epicenter (degree) 0.76802
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 37
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 87964831
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-22 14:41:12

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 86838341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-04 23:29:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-02-04T23:16:27.61 0.6 undecidable manual S 339 64.491 50 0.83 35
IV.MOMA.HHZ. 2021-02-04T23:16:25.63 0.6 undecidable manual S 253 55.9995 50 1.11 32
IV.ATCC.EHZ. 2021-02-04T23:16:24.63 0.6 undecidable manual S 298 54.0015 50 0.65 39
IV.FOSV.EHZ. 2021-02-04T23:16:24.15 0.6 undecidable manual S 315 53.3022 50 0.35 43
IV.RM33.HNE. 2021-02-04T23:16:23.28 0.3 undecidable manual S 181 49.5171 50 0.49 63
IV.ASSB.HHZ. 2021-02-04T23:16:22.40 0.6 undecidable manual S 282 47.1195 50 0.25 44
IV.TERO.HHZ. 2021-02-04T23:16:22.32 0.6 undecidable manual S 140 48.0186 50 -0.05 46
IV.CING.HNZ. 2021-02-04T23:16:22.23 0.6 undecidable manual S 357 46.62 50 0.2 45
IV.CAMP.HHZ. 2021-02-04T23:16:22.52 0.6 undecidable manual S 162 48.8178 50 -0.09 46
IV.EL6.EHZ. 2021-02-04T23:16:21.02 0.6 undecidable manual S 346 42.7239 50 0.06 46
IV.LNSS.HHZ. 2021-02-04T23:16:21.20 0.6 undecidable manual S 201 42.0246 50 0.43 43
IV.MPAG.EHZ. 2021-02-04T23:16:21.52 0.3 undecidable manual P 333 83.7495 50 0.34 61
IV.PIEI.HHZ. 2021-02-04T23:16:21.12 0.3 undecidable manual P 319 85.248 50 -0.3 61
IV.GAVE.EHN. 2021-02-04T23:16:20.55 0.3 undecidable manual S 223 39.8268 50 0.34 66
IV.T1299.HNN. 2021-02-04T23:16:19.44 0.1 undecidable manual S 173 35.9418 50 0.28 90
IV.SMA1.EHZ. 2021-02-04T23:16:19.27 0.1 undecidable manual S 166 37.1295 50 -0.2 91
IV.MNTT.EHZ. 2021-02-04T23:16:18.06 0.1 undecidable manual S 68 32.1456 105 0.04 95
IV.SEF1.HNN. 2021-02-04T23:16:18.31 0.3 undecidable manual S 313 31.0467 105 0.64 61
IV.MURB.HHZ. 2021-02-04T23:16:18.78 0.3 undecidable manual P 301 66.378 50 0.28 64
IV.CESX.HHZ. 2021-02-04T23:16:17.57 0.6 undecidable manual P 234 64.7907 50 -0.7 38
IV.ARVD.HHZ. 2021-02-04T23:16:17.92 0.3 undecidable manual P 339 64.491 50 -0.29 64
IV.MTRA.EHZ. 2021-02-04T23:16:16.00 0.6 undecidable manual S 148 25.9518 108 0.01 48
IV.ATCC.EHZ. 2021-02-04T23:16:16.41 0.1 undecidable manual P 298 54.0015 50 -0.19 88
IV.MML1.EHZ. 2021-02-04T23:16:16.41 0.6 undecidable manual S 310 27.1506 107 0.04 48
IV.CESI.HHZ. 2021-02-04T23:16:16.51 0.6 undecidable manual S 282 26.751 107 0.27 46
IV.FOSV.EHZ. 2021-02-04T23:16:16.14 0.1 negative manual P 315 53.3022 50 -0.35 86
IV.MNTP.HNZ. 2021-02-04T23:16:16.80 0.3 undecidable manual S 44 28.1496 107 0.11 71
IV.MOMA.HHZ. 2021-02-04T23:16:16.92 0.3 undecidable manual P 253 55.9995 50 0.01 68
IV.TERO.HHZ. 2021-02-04T23:16:15.32 0.3 undecidable manual P 140 48.0186 50 -0.35 65
IV.MDAR.HNZ. 2021-02-04T23:16:15.96 0.3 undecidable manual S 345 27.1506 107 -0.42 66
IV.CING.HNZ. 2021-02-04T23:16:15.06 0.1 undecidable manual P 357 46.62 50 -0.4 86
IV.CAMP.HHZ. 2021-02-04T23:16:15.41 0.3 undecidable manual P 162 48.8178 50 -0.4 64
IV.RM33.HNE. 2021-02-04T23:16:15.68 0.3 undecidable manual P 181 49.5171 50 -0.23 66
IV.SAP2.EHZ. 2021-02-04T23:16:15.13 0.6 undecidable manual S 42 20.9679 112 0.8 39
IV.ASSB.HHZ. 2021-02-04T23:16:15.23 0.1 negative manual P 282 47.1195 50 -0.31 87
IV.EL6.EHZ. 2021-02-04T23:16:14.32 0.1 undecidable manual P 346 42.7239 50 -0.53 83
IV.OFFI.HHE. 2021-02-04T23:16:14.13 0.3 undecidable manual P 93 37.2294 50 0.11 69
IV.MF5.EHZ. 2021-02-04T23:16:14.13 0.6 undecidable manual S 79 19.1697 114 0.36 45
IV.GAVE.EHN. 2021-02-04T23:16:14.25 0.3 undecidable manual P 223 39.8268 50 -0.17 68
IV.LNSS.HHZ. 2021-02-04T23:16:14.61 0.1 undecidable manual P 201 42.0246 50 -0.14 91
IV.SMA1.EHZ. 2021-02-04T23:16:13.55 0.1 undecidable manual P 166 37.1295 50 -0.45 86
IV.NRCA.HHZ. 2021-02-04T23:16:13.25 0.6 undecidable manual S 214 16.3725 117 0.37 46
IT.MTCL.HGZ. 2021-02-04T23:16:13.90 0.3 undecidable manual S 283 18.9699 114 0.19 71
IV.T1299.HNN. 2021-02-04T23:16:13.65 0.1 undecidable manual P 173 35.9418 50 -0.16 92
IV.MNTT.EHZ. 2021-02-04T23:16:13.65 0.1 negative manual P 68 32.1456 105 0.49 86
IV.PF6.EHZ. 2021-02-04T23:16:13.81 0.6 undecidable manual S 352 20.3685 112 -0.34 45
IV.MNTP.HNZ. 2021-02-04T23:16:12.69 0.3 undecidable manual P 44 28.1496 107 0.3 68
IV.SEF1.HNN. 2021-02-04T23:16:12.93 0.3 undecidable manual P 313 31.0467 105 -0.02 72
IV.FDMO.HHZ. 2021-02-04T23:16:12.01 0.1 undecidable manual S 308 14.4744 120 -0.3 93
IV.MTRA.EHZ. 2021-02-04T23:16:12.14 0.1 negative manual P 148 25.9518 108 0.16 94
IV.CSP1.EHZ. 2021-02-04T23:16:12.17 0.1 undecidable manual S 353 15.2736 119 -0.36 91
IV.MDAR.HNZ. 2021-02-04T23:16:12.39 0.3 undecidable manual P 345 27.1506 107 0.19 70
IV.CESI.HHZ. 2021-02-04T23:16:12.03 0.1 negative manual P 282 26.751 107 -0.09 95
IV.FEMA.HNZ. 2021-02-04T23:16:12.78 0.3 undecidable manual S 273 14.4744 120 0.48 67
IV.GUMA.HHZ. 2021-02-04T23:16:12.70 0.1 undecidable manual S 36 14.7741 120 0.31 92
IV.SAP2.EHZ. 2021-02-04T23:16:11.52 0.3 undecidable manual P 42 20.9679 112 0.5 66
IV.MML1.EHZ. 2021-02-04T23:16:11.89 0.1 negative manual P 310 27.1506 107 -0.31 90
IV.PF6.EHZ. 2021-02-04T23:16:10.55 0.1 positive manual P 352 20.3685 112 -0.38 90
IV.NRCA.HHZ. 2021-02-04T23:16:10.28 0.1 negative manual P 214 16.3725 117 0.09 96
IT.MTCL.HGZ. 2021-02-04T23:16:10.86 0.3 undecidable manual P 283 18.9699 114 0.19 70
IV.MMO1.EHZ. 2021-02-04T23:16:10.84 0.1 undecidable manual S 128 10.1787 129 -0.24 94
IV.MF5.EHZ. 2021-02-04T23:16:10.98 0.1 undecidable manual P 79 19.1697 114 0.28 92
IV.FEMA.HNZ. 2021-02-04T23:16:10.11 0.3 undecidable manual P 273 14.4744 120 0.26 70
IV.GUMA.HHZ. 2021-02-04T23:16:09.98 0.1 positive manual P 36 14.7741 120 0.07 97
IV.FDMO.HHZ. 2021-02-04T23:16:09.67 0.1 negative manual P 308 14.4744 120 -0.19 95
IV.MC2.EHZ. 2021-02-04T23:16:09.85 0.1 undecidable manual S 213 5.7942 145 -0.19 96
IV.CSP1.EHZ. 2021-02-04T23:16:09.70 0.1 undecidable manual P 353 15.2736 119 -0.28 93
IV.MC2.EHZ. 2021-02-04T23:16:08.55 0.1 positive manual P 213 5.7942 145 0 100
IV.MMO1.EHZ. 2021-02-04T23:16:08.99 0.1 positive manual P 128 10.1787 129 -0.16 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSP1.EHN. ML:1.8 0.0007121936 0.2944 AML other m 2021-02-04T23:16:12.43
IV.FDMO.HHN. ML:1.4 0.0002797475 0.2176 AML other m 2021-02-04T23:16:12.28
IV.FDMO.HHE. ML:1.6 0.0003829515 0.2816 AML other m 2021-02-04T23:16:12.52
IV.CSP1.EHE. ML:2.1 0.0012265475 0.3328 AML other m 2021-02-04T23:16:13.04
IV.GUMA.HNE. ML:2.2 0.001594837 0.3328 AML other m 2021-02-04T23:16:12.97
IV.GUMA.HNN. ML:2.1 0.0012239601 0.256 AML other m 2021-02-04T23:16:13.23
IV.GUMA.HHE. ML:2.3 0.00199786 1.1392 AML other m 2021-02-04T23:16:13.39
IV.GUMA.HHN. ML:2.2 0.0016382905 0.32 AML other m 2021-02-04T23:16:13.55
IV.NRCA.HNE. ML:2.0 0.0009564174 0.1792 AML other m 2021-02-04T23:16:13.60
IV.NRCA.HHE. ML:2.0 0.0009455 0.16 AML other m 2021-02-04T23:16:13.69
IV.NRCA.HHN. ML:1.8 0.0006933021000000001 0.1536 AML other m 2021-02-04T23:16:13.71
IV.NRCA.HNN. ML:1.8 0.00059002705 0.1536 AML other m 2021-02-04T23:16:13.71
IV.MTRA.EHE. ML:1.5 0.0001766654 0.2176 AML other m 2021-02-04T23:16:16.65
IV.MTRA.HNN. ML:1.6 0.0002526928 0.3328 AML other m 2021-02-04T23:16:16.78
IV.MTRA.EHN. ML:1.6 0.00023744695 0.32 AML other m 2021-02-04T23:16:16.78
IV.CESI.HHE. ML:1.7 0.0003011632 0.192 AML other m 2021-02-04T23:16:16.84
IV.CESI.HNE. ML:1.8 0.0003326965 0.2304 AML other m 2021-02-04T23:16:16.86
IV.CESI.HHN. ML:1.7 0.0002766882 0.4864 AML other m 2021-02-04T23:16:16.94
IV.SMA1.EHN. ML:1.5 0.00011981269999999999 0.5632 AML other m 2021-02-04T23:16:19.76
IV.EL6.EHN. ML:1.4 0.000085919155 0.5888 AML other m 2021-02-04T23:16:21.46
IV.LNSS.HHE. ML:2.1 0.000377 0.28 AML other m 2021-02-04T23:16:21.66
IV.LNSS.HNN. ML:2.0 0.0003105027 0.2432 AML other m 2021-02-04T23:16:21.55
IV.LNSS.HHN. ML:2.0 0.0003675 0.24 AML other m 2021-02-04T23:16:21.67
IV.LNSS.HNE. ML:2.1 0.00038553645 0.32 AML other m 2021-02-04T23:16:21.66
IV.EL6.EHE. ML:1.6 0.000132847535 0.6784 AML other m 2021-02-04T23:16:22.16
IV.ASSB.HHN. ML:1.3 0.000061447325 0.6144 AML other m 2021-02-04T23:16:22.54
IV.ASSB.HHE. ML:1.4 0.00007245968499999999 0.4608 AML other m 2021-02-04T23:16:22.78
IV.CAMP.HHN. ML:1.4 0.000066541165 0.2944 AML other m 2021-02-04T23:16:22.98
IV.CAMP.HHE. ML:1.3 0.00004950271 0.2944 AML other m 2021-02-04T23:16:23.00
IV.FOSV.EHE. ML:1.7 0.00011135000000000001 0.26 AML other m 2021-02-04T23:16:24.45
IV.FOSV.EHN. ML:1.6 0.000098551875 0.2816 AML other m 2021-02-04T23:16:24.56
IV.ATCC.EHN. ML:1.6 0.00008478763 0.8448 AML other m 2021-02-04T23:16:25.38
IV.ATCC.EHE. ML:1.8 0.00013953535 0.192 AML other m 2021-02-04T23:16:25.31
IV.MOMA.HHN. ML:1.3 0.000042542795 0.1792 AML other m 2021-02-04T23:16:26.11
IV.MOMA.HHE. ML:1.6 0.00009120000000000001 0.28 AML other m 2021-02-04T23:16:26.55
IV.ARVD.HHN. ML:1.1 0.000025865595 0.1664 AML other m 2021-02-04T23:16:28.07
IV.ARVD.HHE. ML:1.4 0.000048355830000000004 0.1408 AML other m 2021-02-04T23:16:28.41
IV.MURB.HHE. ML:2.1 0.0002085 0.3 AML other m 2021-02-04T23:16:29.86
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