Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 25-01-2021 and time 20:30:48 (UTC) in region 5 km S Castelsantangelo sul Nera (MC)

A magnitude ML 1.7 earthquake occured in region: 5 km S Castelsantangelo sul Nera (MC), on

  • 25-01-2021 20:30:48 (UTC)
  • 25-01-2021 21:30:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8480, 13.1360 at 10 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
Castelsantangelo sul Nera MC 6 281 281
Norcia PG 7 4957 5238
Preci PG 9 724 5962
Visso MC 10 1107 7069
Ussita MC 11 444 7513
Arquata del Tronto AP 16 1178 8691
Montegallo AP 16 523 9214
Montemonaco AP 17 604 9818
Cascia PG 17 3217 13035
Sellano PG 18 1079 14114
Bolognola MC 18 142 14256
Cerreto di Spoleto PG 18 1075 15331
Accumoli RI 19 667 15998
Monte Cavallo MC 20 145 16143
Montefortino FM 20 1178 17321

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
51 Km W of Teramo (54892 inhabitants)
51 Km NE of Terni (111501 inhabitants)
59 Km NW of L'Aquila (69753 inhabitants)
67 Km E of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
91 Km SW of Ancona (100861 inhabitants)
97 Km NE of Viterbo (67173 inhabitants)
98 Km W of Pescara (121014 inhabitants)
100 Km NE of Guidonia Montecelio (88673 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 2021-01-25
20:30:48		 42.8482 13.1358 10 2021-07-12
16:54:59		 Bollettino Sismico Italiano INGV 87449161
Reviewed
Rev100 		ML 1.8 2021-01-25
20:30:48		 42.852 13.1353 12 2021-01-25
20:35:21		 Sala Sismica INGV-Roma 86574231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-25 20:30:48 ± 0.05
Latitude 42.8482 ± 0.0027
Longitude 13.1358 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87449161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 310
Semi-minor axis of confidence ellipse (meter) 141
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 63
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45
Number of associated phases, regardless of their use for origin computation 64
Number of defining phases 64
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.02158
Epicentral distance of station farthest from the epicenter (degree) 0.75543
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 86574231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-25 20:35:21

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 39
Type of magnitude ML
Reference to an origin 87449161
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-24 11:57:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FRON.EHZ. 2021-01-25T20:31:12.69 0.6 undecidable manual S 336 81.3519 50 0.23 46
IV.ARVD.HHE. 2021-01-25T20:31:11.07 0.6 undecidable manual S 348 73.7706 50 0.63 42
IV.SSFR.HHN. 2021-01-25T20:31:10.32 0.6 undecidable manual S 336 71.2731 50 0.56 44
IV.FIAM.HNN. 2021-01-25T20:31:08.37 0.6 undecidable manual S 181 64.3911 50 0.44 46
MN.AQU.HNN. 2021-01-25T20:31:06.77 0.6 undecidable manual S 158 59.0964 50 0.27 48
IV.CING.HNZ. 2021-01-25T20:31:06.82 0.6 undecidable manual S 5 58.6968 50 0.41 47
IV.GIGS.HHN. 2021-01-25T20:31:05.61 0.6 undecidable manual S 141 56.499 50 -0.21 49
IV.ATCC.EHZ. 2021-01-25T20:31:05.78 0.6 undecidable manual S 313 54.9006 50 0.38 47
IV.MOMA.HHZ. 2021-01-25T20:31:03.60 0.6 undecidable manual S 264 46.3203 50 0.5 47
IV.ATVA.EHE. 2021-01-25T20:31:02.24 0.6 undecidable manual P 305 83.8494 50 -0.31 45
IV.ARRO.EHZ. 2021-01-25T20:31:02.19 0.6 undecidable manual S 225 42.4242 50 0.12 51
IV.ASSB.HHZ. 2021-01-25T20:31:02.53 0.6 undecidable manual S 299 44.3223 50 -0.05 52
IV.FRON.EHZ. 2021-01-25T20:31:02.22 0.6 undecidable manual P 336 81.3519 50 0.05 48
IV.TERO.HHZ. 2021-01-25T20:31:02.86 0.6 undecidable manual S 123 45.621 50 -0.05 51
IV.CAMP.HHE. 2021-01-25T20:31:01.58 0.3 undecidable manual S 147 41.2254 50 -0.16 76
IV.ATSC.EHE. 2021-01-25T20:31:01.21 0.6 undecidable manual P 330 73.4709 50 0.25 47
IV.VCEL.EHN. 2021-01-25T20:31:01.46 0.6 undecidable manual P 131 76.4679 50 0.06 49
IV.ARVD.HHE. 2021-01-25T20:31:01.28 0.6 undecidable manual P 348 73.7706 50 0.28 47
IV.SAP2.EHZ. 2021-01-25T20:31:00.67 0.6 undecidable manual S 38 34.8429 50 0.62 46
IV.MURB.HHE. 2021-01-25T20:31:00.26 0.6 undecidable manual P 313 67.5768 50 0.21 48
IV.SSFR.HHN. 2021-01-25T20:31:00.86 0.6 undecidable manual P 336 71.2731 50 0.25 47
IV.FIAM.HNN. 2021-01-25T20:30:59.30 0.3 undecidable manual P 181 64.3911 50 -0.25 72
IV.MF5.EHZ. 2021-01-25T20:30:59.49 0.6 undecidable manual S 59 30.5472 50 0.6 46
IV.CING.HNZ. 2021-01-25T20:30:58.57 0.6 undecidable manual P 5 58.6968 50 -0.1 50
IV.LNSS.HHZ. 2021-01-25T20:30:58.51 0.6 undecidable manual S 196 28.3494 50 0.21 51
IV.SMA1.EHZ. 2021-01-25T20:30:58.32 0.6 undecidable manual S 146 29.0487 50 -0.19 51
IV.GUMA.HHZ. 2021-01-25T20:30:58.56 0.6 undecidable manual S 34 28.749 50 0.14 52
IV.PF6.EHN. 2021-01-25T20:30:58.98 0.6 undecidable manual S 8 32.4453 50 -0.44 49
MN.AQU.HNN. 2021-01-25T20:30:58.66 0.6 undecidable manual P 158 59.0964 50 -0.07 50
IV.T1299.HNN. 2021-01-25T20:30:58.04 0.3 undecidable manual S 153 26.5512 50 0.21 77
IV.ATCC.EHZ. 2021-01-25T20:30:57.85 0.6 undecidable manual P 313 54.9006 50 -0.24 49
IV.CESI.HHZ. 2021-01-25T20:30:57.17 0.6 undecidable manual S 313 25.5522 50 -0.4 49
IV.CSP1.EHZ. 2021-01-25T20:30:57.72 0.6 undecidable manual S 12 27.6501 50 -0.39 49
IV.MNTT.EHZ. 2021-01-25T20:30:57.14 0.6 undecidable manual P 57 44.2224 50 0.7 43
IV.GIGS.HHN. 2021-01-25T20:30:57.64 0.6 undecidable manual P 141 56.499 50 -0.69 43
IV.EL6.EHZ. 2021-01-25T20:30:57.51 0.6 undecidable manual P 357 53.4021 50 -0.36 48
IV.GAVE.EHZ. 2021-01-25T20:30:57.68 0.3 undecidable manual S 229 26.2515 50 -0.06 80
IV.MTRA.EHZ. 2021-01-25T20:30:56.96 0.6 undecidable manual S 115 23.5542 114 -0.04 54
IV.TERO.HHZ. 2021-01-25T20:30:56.43 0.3 undecidable manual P 123 45.621 50 -0.22 74
IV.MOMA.HHZ. 2021-01-25T20:30:56.92 0.6 undecidable manual P 264 46.3203 50 0.16 50
IV.ARRO.EHZ. 2021-01-25T20:30:56.07 0.3 undecidable manual P 225 42.4242 50 -0.1 77
IV.ASSB.HHZ. 2021-01-25T20:30:56.08 0.6 undecidable manual P 299 44.3223 50 -0.38 48
IV.CAMP.HHE. 2021-01-25T20:30:55.74 0.3 undecidable manual P 147 41.2254 50 -0.23 75
IV.SAP2.EHZ. 2021-01-25T20:30:55.11 0.6 undecidable manual P 38 34.8429 50 0.11 52
IT.MTCL.HGZ. 2021-01-25T20:30:55.35 0.6 undecidable manual S 326 19.5693 118 -0.43 50
IV.FDMO.HHZ. 2021-01-25T20:30:55.89 0.6 undecidable manual S 349 21.2676 116 -0.4 50
IV.FEMA.HNZ. 2021-01-25T20:30:54.38 0.6 undecidable manual S 331 14.4744 125 0.13 53
IV.PF6.EHN. 2021-01-25T20:30:54.20 0.3 undecidable manual P 8 32.4453 50 -0.43 73
IV.MF5.EHZ. 2021-01-25T20:30:54.58 0.6 undecidable manual P 59 30.5472 50 0.25 51
IV.MMO1.EHZ. 2021-01-25T20:30:54.86 0.6 undecidable manual S 70 16.5723 122 0.01 55
IV.SMA1.EHZ. 2021-01-25T20:30:54.05 0.3 undecidable manual P 146 29.0487 50 -0.06 79
IV.GUMA.HHZ. 2021-01-25T20:30:54.06 0.3 undecidable manual P 34 28.749 50 0 80
IV.GAVE.EHZ. 2021-01-25T20:30:53.61 0.3 undecidable manual P 229 26.2515 50 -0.06 80
IV.T1299.HNN. 2021-01-25T20:30:53.82 0.3 undecidable manual P 153 26.5512 50 0.1 79
IV.MTRA.EHZ. 2021-01-25T20:30:53.00 0.6 undecidable manual P 115 23.5542 114 -0.24 51
IV.LNSS.HHZ. 2021-01-25T20:30:53.81 0.3 undecidable manual P 196 28.3494 50 -0.18 78
IV.CESI.HHZ. 2021-01-25T20:30:53.31 0.3 undecidable manual P 313 25.5522 50 -0.26 77
IV.CSP1.EHZ. 2021-01-25T20:30:53.54 0.1 positive manual P 12 27.6501 50 -0.34 100
IV.FDMO.HHZ. 2021-01-25T20:30:52.59 0.3 undecidable manual P 349 21.2676 116 -0.24 78
IV.MMO1.EHZ. 2021-01-25T20:30:52.05 0.3 undecidable manual P 70 16.5723 122 0.05 81
IV.NRCA.HNZ. 2021-01-25T20:30:52.32 0.3 undecidable manual S 227 2.3976 167 0.57 74
IT.MTCL.HGZ. 2021-01-25T20:30:52.31 0.3 undecidable manual P 326 19.5693 118 -0.22 78
IV.FEMA.HNZ. 2021-01-25T20:30:51.77 0.3 undecidable manual P 331 14.4744 125 0.12 80
IV.NRCA.HNZ. 2021-01-25T20:30:50.68 0.3 undecidable manual P 227 2.3976 167 0.47 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.1 0.002334471 0.0768 AML other m 2021-01-25T20:30:52.51
IV.NRCA.HHE. ML:2.2 0.002565 0.06 AML other m 2021-01-25T20:30:52.51
IV.NRCA.HNN. ML:2.1 0.0023781665 0.064 AML other m 2021-01-25T20:30:52.47
IV.NRCA.HHN. ML:2.1 0.002435774 0.064 AML other m 2021-01-25T20:30:52.47
IV.FEMA.HNE. ML:2.0 0.00101211095 0.1792 AML other m 2021-01-25T20:30:54.64
IV.FEMA.HNN. ML:1.8 0.0006464944 0.1024 AML other m 2021-01-25T20:30:55.21
IV.FDMO.HHE. ML:1.7 0.00034199999999999996 0.14 AML other m 2021-01-25T20:30:56.14
IV.FDMO.HHN. ML:1.8 0.00043300000000000006 0.24 AML other m 2021-01-25T20:30:56.14
IV.CESI.HHE. ML:1.6 0.00020800000000000001 0.1 AML other m 2021-01-25T20:30:57.59
IV.CESI.HHN. ML:1.7 0.0002985507 0.1536 AML other m 2021-01-25T20:30:57.50
IV.GAVE.EHE. ML:2.0 0.00054 0.22 AML other m 2021-01-25T20:30:58.21
IV.GAVE.EHN. ML:2.0 0.000587 0.16 AML other m 2021-01-25T20:30:58.14
IV.MTRA.EHN. ML:1.4 0.0001751499 0.1792 AML other m 2021-01-25T20:30:58.50
IV.MTRA.EHE. ML:1.5 0.00020782194999999999 0.1408 AML other m 2021-01-25T20:30:58.69
IV.LNSS.HHE. ML:1.9 0.0003715 0.14 AML other m 2021-01-25T20:30:59.37
IV.LNSS.HHN. ML:1.7 0.0002465365 0.1408 AML other m 2021-01-25T20:30:59.06
IV.SMA1.EHE. ML:1.5 0.00015251205 0.1408 AML other m 2021-01-25T20:31:00.67
IV.SMA1.EHN. ML:1.6 0.00021014074999999998 0.1152 AML other m 2021-01-25T20:30:59.24
IV.SAP2.EHN. ML:2.3 0.0008325 0.1 AML other m 2021-01-25T20:31:01.17
IV.ASSB.HHN. ML:1.4 0.00008047795000000001 0.1792 AML other m 2021-01-25T20:31:02.70
IV.TERO.HHE. ML:1.6 0.00010575 0.52 AML other m 2021-01-25T20:31:04.20
IV.ASSB.HHE. ML:1.4 0.000074678965 0.2304 AML other m 2021-01-25T20:31:02.67
IV.TERO.HHN. ML:1.6 0.00011147581500000001 0.0768 AML other m 2021-01-25T20:31:03.16
IV.MTRA.HNN. ML:1.5 0.00019561879999999997 0.1792 AML other m 2021-01-25T20:30:58.50
IV.MTRA.HNE. ML:1.5 0.0002031553 0.1664 AML other m 2021-01-25T20:30:57.14
IV.CESI.HNE. ML:1.5 0.00019396295000000002 0.1024 AML other m 2021-01-25T20:30:57.27
IV.CESI.HNN. ML:1.7 0.00029105785 0.1536 AML other m 2021-01-25T20:30:57.50
IV.CSP1.EHN. ML:1.8 0.0003652256 0.1664 AML other m 2021-01-25T20:30:58.88
IV.CSP1.EHE. ML:1.8 0.00032494540000000007 0.1408 AML other m 2021-01-25T20:30:57.94
IV.GAVE.HNN. ML:1.6 0.0001986352 0.3328 AML other m 2021-01-25T20:30:58.21
IV.GAVE.HNE. ML:1.9 0.00048699355 0.2176 AML other m 2021-01-25T20:30:58.20
IV.LNSS.HNN. ML:1.7 0.00023307319999999997 0.1408 AML other m 2021-01-25T20:30:59.06
IV.LNSS.HNE. ML:1.8 0.0003502286 0.1408 AML other m 2021-01-25T20:30:59.37
IV.GUMA.HNN. ML:1.7 0.0002508969 0.1408 AML other m 2021-01-25T20:30:59.63
IV.GUMA.HNE. ML:1.7 0.000239404 0.2176 AML other m 2021-01-25T20:31:01.03
IV.GUMA.HHE. ML:1.6 0.0002112885 0.1792 AML other m 2021-01-25T20:30:59.48
IV.ARRO.EHE. ML:1.6 0.0001322557 0.2048 AML other m 2021-01-25T20:31:02.37
IV.ARRO.EHN. ML:1.5 0.00009968677000000001 0.2048 AML other m 2021-01-25T20:31:02.30
IV.TERO.HNE. ML:1.5 0.00010192807499999999 0.1408 AML other m 2021-01-25T20:31:04.54
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