Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 21-01-2021 and time 21:39:19 (UTC) in region 3 km S Castelsantangelo sul Nera (MC)

A magnitude ML 1.3 earthquake occured in region: 3 km S Castelsantangelo sul Nera (MC), on

  • 21-01-2021 21:39:19 (UTC)
  • 21-01-2021 22:39:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8670, 13.1500 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 3 281 281
Visso MC 9 1107 1388
Ussita MC 9 444 1832
Preci PG 9 724 2556
Norcia PG 9 4957 7513
Montemonaco AP 15 604 8117
Montegallo AP 15 523 8640
Bolognola MC 16 142 8782
Arquata del Tronto AP 16 1178 9960
Montefortino FM 18 1178 11138
Acquacanina MC 18 121 11259
Sellano PG 18 1079 12338
Monte Cavallo MC 19 145 12483
Fiastra MC 19 559 13042
Fiordimonte MC 20 202 13244
Cerreto di Spoleto PG 20 1075 14319
Cascia PG 20 3217 17536

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
51 Km W of Teramo (54892 inhabitants)
53 Km NE of Terni (111501 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
67 Km E of Perugia (166134 inhabitants)
89 Km SW of Ancona (100861 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
98 Km W of Pescara (121014 inhabitants)
99 Km NE of Viterbo (67173 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
Reviewed
Rev100 		ML 1.3 2021-01-21
21:39:19		 42.8672 13.1502 11 2021-01-21
21:49:25		 Sala Sismica INGV-Roma 86439771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-21 21:39:19 ± 0.04
Latitude 42.8672 ± 0.0018
Longitude 13.1502 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86439771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 341
Semi-minor axis of confidence ellipse (meter) 160
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27609
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 86439771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-21 21:49:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SMA1.EHN. 2021-01-21T21:39:30.08 0.3 undecidable manual S 150 30.2475 50 0.05 73
IV.T1299.HNN. 2021-01-21T21:39:29.42 0.6 undecidable manual S 157 27.9498 50 0.01 49
IV.LNSS.HHE. 2021-01-21T21:39:29.92 0.6 undecidable manual S 197 30.6471 50 -0.21 47
IV.CSP1.EHZ. 2021-01-21T21:39:28.75 0.3 undecidable manual S 10 25.3524 50 0.04 74
IV.CESI.HHZ. 2021-01-21T21:39:28.78 0.6 undecidable manual S 308 25.1526 50 0.13 48
IV.GAVE.EHZ. 2021-01-21T21:39:27.62 3.0 undecidable manual S 0
IT.MTCL.HGE. 2021-01-21T21:39:26.61 0.6 undecidable manual S 319 18.6702 50 -0.32 47
IV.FDMO.HHZ. 2021-01-21T21:39:26.98 0.6 undecidable manual S 345 19.4694 50 -0.17 48
IV.MMO1.EHZ. 2021-01-21T21:39:25.63 0.6 undecidable manual S 76 14.7741 126 -0.2 48
IV.LNSS.HHE. 2021-01-21T21:39:25.79 0.3 undecidable manual P 197 30.6471 50 0.17 71
IV.SMA1.EHN. 2021-01-21T21:39:25.35 0.6 undecidable manual P 150 30.2475 50 -0.21 47
IV.T1299.HNN. 2021-01-21T21:39:25.20 0.1 undecidable manual P 157 27.9498 50 0 98
IV.CESI.HHZ. 2021-01-21T21:39:24.89 0.6 positive manual P 308 25.1526 50 0.12 48
IV.CSP1.EHZ. 2021-01-21T21:39:24.95 0.6 positive manual P 10 25.3524 50 0.16 48
IV.MMO1.EHZ. 2021-01-21T21:39:23.22 0.1 undecidable manual P 76 14.7741 126 0.08 99
IT.MTCL.HGE. 2021-01-21T21:39:23.79 0.1 undecidable manual P 319 18.6702 50 0.02 100
IV.GAVE.EHZ. 2021-01-21T21:39:23.76 3.0 undecidable manual P -0.04 0
IV.NRCA.HHZ. 2021-01-21T21:39:23.38 0.6 undecidable manual S 218 4.6953 157 -0.2 49
IV.FDMO.HHZ. 2021-01-21T21:39:23.93 0.6 negative manual P 345 19.4694 50 0.04 50
IV.NRCA.HHZ. 2021-01-21T21:39:21.96 0.1 positive manual P 218 4.6953 157 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.3 0.0003265 0.1 AML other m 2021-01-21T21:39:23.48
IV.NRCA.HHN. ML:1.1 0.00019350000000000001 0.82 AML other m 2021-01-21T21:39:24.43
IV.GAVE.EHE. ML:1.4 0.00012077 0.94 AML other m 2021-01-21T21:39:27.31
IV.GAVE.EHN. ML:1.5 0.0001563 0.58 AML other m 2021-01-21T21:39:29.37
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