Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 25-01-2021 and time 08:52:05 (Italy) in region 9 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.6 earthquake occured in region: 9 km SE Castelsantangelo sul Nera (MC), on

  • 25-01-2021 07:52:05 (UTC)
  • 25-01-2021 08:52:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8310, 13.2100 at 9 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 9 281 281
Arquata del Tronto AP 10 1178 1459
Montegallo AP 10 523 1982
Norcia PG 10 4957 6939
Montemonaco AP 12 604 7543
Ussita MC 14 444 7987
Visso MC 15 1107 9094
Preci PG 15 724 9818
Accumoli RI 15 667 10485
Montefortino FM 17 1178 11663
Acquasanta Terme AP 18 2916 14579
Bolognola MC 18 142 14721

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
45 Km W of Teramo (54892 inhabitants)
55 Km NE of Terni (111501 inhabitants)
55 Km N of L'Aquila (69753 inhabitants)
74 Km E of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
91 Km S of Ancona (100861 inhabitants)
92 Km W of Pescara (121014 inhabitants)
95 Km NW of Chieti (51815 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 1.6 2021-01-25
07:52:05		 42.8308 13.21 9 2021-07-12
16:54:56		 Bollettino Sismico Italiano INGV 86650771
Reviewed
Rev100 		ML 1.6 2021-01-25
07:52:05		 42.8327 13.2002 9 2021-01-25
08:37:23		 Sala Sismica INGV-Roma 86554871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-25 07:52:05 ± 0.07
Latitude 42.8308 ± 0.0027
Longitude 13.2100 ± 0.0037
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86650771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 304
Semi-minor axis of confidence ellipse (meter) 116
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 94
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.07015
Epicentral distance of station farthest from the epicenter (degree) 0.54499
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86650771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-05 14:47:36

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86554871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-25 08:37:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHN. 2021-01-25T07:52:18.80 0.6 undecidable manual S 126 39.5271 50 -0.06 64
IV.CING.HNZ. 2021-01-25T07:52:16.30 0.6 undecidable manual P 359 60.495 50 -0.07 61
IV.CESI.HHZ. 2021-01-25T07:52:16.67 0.6 undecidable manual S 308 31.4463 106 -0.01 65
IV.GAVE.HNZ. 2021-01-25T07:52:16.28 0.6 undecidable manual S 239 29.9478 106 0.1 64
IV.LNSS.HNN. 2021-01-25T07:52:15.87 0.6 undecidable manual S 209 28.8489 107 0.07 65
IV.CSP1.EHZ. 2021-01-25T07:52:15.69 0.6 undecidable manual S 359 28.9488 107 -0.16 64
IV.MF5.EHZ. 2021-01-25T07:52:15.49 0.6 undecidable manual S 49 26.751 108 0.38 61
IV.GUMA.HHZ. 2021-01-25T07:52:15.76 0.6 undecidable manual S 22 27.6501 108 0.34 61
IV.FDMO.HHE. 2021-01-25T07:52:14.72 0.6 undecidable manual S 336 24.8529 109 0.21 63
IV.SMA1.EHE. 2021-01-25T07:52:14.32 0.6 undecidable manual S 155 24.4533 110 -0.04 66
IV.GAVE.HNZ. 2021-01-25T07:52:12.01 0.3 undecidable manual P 239 29.9478 106 0.41 90
IV.TERO.HHN. 2021-01-25T07:52:12.88 0.6 undecidable manual P 126 39.5271 50 -0.27 61
IV.MTRA.HNZ. 2021-01-25T07:52:12.46 0.6 undecidable manual S 118 17.2716 117 0.39 62
IV.MF5.EHZ. 2021-01-25T07:52:11.03 0.6 undecidable manual P 49 26.751 108 0.04 65
IV.GUMA.HHZ. 2021-01-25T07:52:11.08 0.6 undecidable manual P 22 27.6501 108 -0.08 65
IV.LNSS.HNN. 2021-01-25T07:52:11.40 0.6 undecidable manual P 209 28.8489 107 0.02 65
IV.CSP1.EHZ. 2021-01-25T07:52:11.76 0.6 undecidable manual P 359 28.9488 107 0.35 61
IV.CESI.HHZ. 2021-01-25T07:52:11.63 0.6 undecidable manual P 308 31.4463 106 -0.26 62
IV.SMA1.EHE. 2021-01-25T07:52:10.36 0.6 undecidable manual P 155 24.4533 110 -0.19 64
IV.MMO1.EHZ. 2021-01-25T07:52:10.22 0.6 undecidable manual S 51 12.1767 126 -0.34 63
IV.FDMO.HHE. 2021-01-25T07:52:10.64 0.6 undecidable manual P 336 24.8529 109 0 66
IV.MTRA.HNZ. 2021-01-25T07:52:09.30 0.6 undecidable manual P 118 17.2716 117 0.07 66
IV.NRCA.HHZ. 2021-01-25T07:52:09.13 0.6 undecidable manual S 272 7.7811 138 -0.3 64
IV.MMO1.EHZ. 2021-01-25T07:52:07.97 0.3 undecidable manual P 51 12.1767 126 -0.38 94
IV.NRCA.HHZ. 2021-01-25T07:52:07.60 0.3 undecidable manual P 272 7.7811 138 -0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:1.7 0.0008160000000000001 0.16 AML other m 2021-01-25T07:52:09.46
IV.NRCA.HHN. ML:1.7 0.0007995 0.16 AML other m 2021-01-25T07:52:09.46
IV.NRCA.HHE. ML:1.7 0.0008304097500000001 0.16 AML other m 2021-01-25T07:52:10.31
IV.NRCA.HNE. ML:1.7 0.0008064861999999999 0.16 AML other m 2021-01-25T07:52:10.31
IV.GUMA.HHE. ML:1.6 0.0001915 0.32 AML other m 2021-01-25T07:52:15.97
IV.GUMA.HNE. ML:1.6 0.00022084664999999997 0.5696 AML other m 2021-01-25T07:52:16.91
IV.GUMA.HHN. ML:1.6 0.00021731322 0.4992 AML other m 2021-01-25T07:52:16.91
IV.GUMA.HNN. ML:1.6 0.00020939850000000002 0.2816 AML other m 2021-01-25T07:52:17.48
IV.CESI.HHN. ML:1.2 0.00008235687999999999 0.16 AML other m 2021-01-25T07:52:17.94
IV.CESI.HHE. ML:1.1 0.000058414424999999996 0.1984 AML other m 2021-01-25T07:52:18.08
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