Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 17-01-2021 and time 13:29:20 (Italy) in region 6 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.7 earthquake occured in region: 6 km SE Castelsantangelo sul Nera (MC), on

  • 17-01-2021 12:29:20 (UTC)
  • 17-01-2021 13:29:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8460, 13.1770 at 17 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 9 4957 5238
Ussita MC 11 444 5682
Preci PG 12 724 6406
Visso MC 12 1107 7513
Arquata del Tronto AP 13 1178 8691
Montegallo AP 13 523 9214
Montemonaco AP 14 604 9818
Bolognola MC 17 142 9960
Montefortino FM 17 1178 11138
Accumoli RI 18 667 11805
Cascia PG 19 3217 15022

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
48 Km W of Teramo (54892 inhabitants)
54 Km NE of Terni (111501 inhabitants)
58 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
95 Km W of Pescara (121014 inhabitants)
98 Km NW of Chieti (51815 inhabitants)
100 Km E 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
Bulletin
Rev1000 		ML 1.7 2021-01-17
12:29:20		 42.846 13.1773 17 2021-07-12
16:55:00		 Bollettino Sismico Italiano INGV 87720961
Reviewed
Rev100 		ML 1.6 2021-01-17
12:29:20		 42.8462 13.1765 16 2021-01-17
12:35:59		 Sala Sismica INGV-Roma 86328601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-17 12:29:20 ± 0.09
Latitude 42.8460 ± 0.0027
Longitude 13.1773 ± 0.0049
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87720961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 367
Semi-minor axis of confidence ellipse (meter) 99
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.48653
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 87720961
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-04 15:16:46

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 86328601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-17 12:35:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-01-17T12:29:38.20 0.6 undecidable manual S 353 54.0015 98 0.45 43
IV.ASSB.HHZ. 2021-01-17T12:29:36.40 0.3 undecidable manual S 298 47.4192 99 0.38 65
IV.TERO.HHZ. 2021-01-17T12:29:34.60 0.6 undecidable manual S 125 42.624 101 -0.17 46
IV.LNSS.HHZ. 2021-01-17T12:29:32.00 0.6 undecidable manual S 203 29.1486 108 0.72 39
IV.SAP2.EHZ. 2021-01-17T12:29:32.70 0.6 undecidable manual S 33 33.1446 105 0.42 45
IV.GUMA.HHZ. 2021-01-17T12:29:31.00 0.6 undecidable manual S 28 27.2505 110 0.22 47
IV.MF5.EHZ. 2021-01-17T12:29:31.30 0.6 undecidable manual S 55 27.8499 109 0.37 46
IV.CESI.HHZ. 2021-01-17T12:29:31.10 0.6 undecidable manual S 309 28.3494 109 0.05 48
IV.CSP1.EHZ. 2021-01-17T12:29:30.50 0.6 undecidable manual S 5 27.3504 110 -0.31 45
IV.SMA1.EHZ. 2021-01-17T12:29:30.90 0.6 undecidable manual S 152 27.1506 110 0.14 47
IV.EL6.EHZ. 2021-01-17T12:29:30.46 0.3 undecidable manual P 353 54.0015 98 -0.12 68
IV.FDMO.HHZ. 2021-01-17T12:29:29.20 0.6 undecidable manual S 341 22.3554 116 -0.38 45
IV.ASSB.HHZ. 2021-01-17T12:29:29.41 0.3 undecidable manual P 298 47.4192 99 -0.17 69
IV.MNTT.EHZ. 2021-01-17T12:29:29.14 0.3 undecidable manual P 55 41.5251 101 0.45 65
IT.MTCL.HGZ. 2021-01-17T12:29:29.20 0.6 undecidable manual S 319 21.867 116 -0.26 47
IV.TERO.HHZ. 2021-01-17T12:29:28.56 0.3 undecidable manual P 125 42.624 101 -0.3 68
IV.FEMA.HNE. 2021-01-17T12:29:28.27 0.6 undecidable manual S 321 16.5723 126 0.03 50
IV.MTRA.EHZ. 2021-01-17T12:29:28.88 0.6 undecidable manual S 119 20.3685 119 -0.24 47
IV.SAP2.EHZ. 2021-01-17T12:29:27.55 0.1 negative manual P 33 33.1446 105 0.13 94
IV.MMO1.EHZ. 2021-01-17T12:29:27.20 0.6 undecidable manual S 64 13.4754 133 -0.42 45
IV.SMA1.EHZ. 2021-01-17T12:29:26.54 0.1 negative manual P 152 27.1506 110 0 97
IV.LNSS.HHZ. 2021-01-17T12:29:26.95 0.3 undecidable manual P 203 29.1486 108 0.11 70
IV.NRCA.HNZ. 2021-01-17T12:29:26.30 0.6 undecidable manual S 255 5.2947 159 -0.09 50
IV.CESI.HHZ. 2021-01-17T12:29:26.66 0.1 undecidable manual P 309 28.3494 109 -0.05 97
IV.MC2.EHZ. 2021-01-17T12:29:26.70 0.6 undecidable manual S 7 7.2927 152 0.09 50
IV.GUMA.HHZ. 2021-01-17T12:29:26.60 0.1 positive manual P 28 27.2505 110 0.05 97
IV.MF5.EHZ. 2021-01-17T12:29:26.75 0.1 positive manual P 55 27.8499 109 0.11 96
IV.CSP1.EHZ. 2021-01-17T12:29:26.33 0.1 positive manual P 5 27.3504 110 -0.25 93
IT.MTCL.HGZ. 2021-01-17T12:29:25.62 0.1 undecidable manual P 319 21.867 116 -0.17 96
IV.MTRA.EHZ. 2021-01-17T12:29:25.47 0.1 undecidable manual P 119 20.3685 119 -0.13 97
IV.FDMO.HHZ. 2021-01-17T12:29:25.62 0.1 undecidable manual P 341 22.3554 116 -0.24 94
IV.FEMA.HNE. 2021-01-17T12:29:25.16 0.3 undecidable manual P 321 16.5723 126 0.07 73
IV.MMO1.EHZ. 2021-01-17T12:29:24.58 0.1 undecidable manual P 64 13.4754 133 -0.15 97
IV.NRCA.HNZ. 2021-01-17T12:29:24.07 0.1 undecidable manual P 255 5.2947 159 0.05 100
IV.MC2.EHZ. 2021-01-17T12:29:24.22 0.1 negative manual P 7 7.2927 152 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.0 0.00100766025 0.0768 AML other m 2021-01-17T12:29:26.44
IV.NRCA.HHE. ML:2.2 0.001637664 0.16 AML other m 2021-01-17T12:29:26.48
IV.NRCA.HNE. ML:2.2 0.0015074014999999997 0.16 AML other m 2021-01-17T12:29:26.49
IV.CESI.HNE. ML:1.4 0.00012476297 0.5824 AML other m 2021-01-17T12:29:26.96
IV.NRCA.HHN. ML:2.0 0.0010350000000000001 0.1 AML other m 2021-01-17T12:29:27.59
IV.MTRA.HNE. ML:1.7 0.00030482575 0.192 AML other m 2021-01-17T12:29:29.08
IV.MTRA.EHE. ML:1.7 0.00029893575 0.1792 AML other m 2021-01-17T12:29:29.09
IV.FDMO.HHN. ML:1.4 0.00015273389999999998 0.3008 AML other m 2021-01-17T12:29:29.65
IV.MTRA.HNN. ML:1.6 0.00026783795 0.3648 AML other m 2021-01-17T12:29:29.69
IV.MTRA.EHN. ML:1.6 0.0002484983 0.3584 AML other m 2021-01-17T12:29:29.69
IV.FDMO.HHE. ML:1.3 0.000112443235 0.16 AML other m 2021-01-17T12:29:29.88
IV.CSP1.EHN. ML:1.8 0.00028550000000000005 1.36 AML other m 2021-01-17T12:29:30.86
IV.CSP1.EHE. ML:1.7 0.000232 0.44 AML other m 2021-01-17T12:29:30.90
IV.GUMA.HHN. ML:2.0 0.0004191685 0.32 AML other m 2021-01-17T12:29:31.47
IV.CESI.HHN. ML:1.7 0.0002567594 0.2624 AML other m 2021-01-17T12:29:31.48
IV.CESI.HNN. ML:1.7 0.0002407039 0.2496 AML other m 2021-01-17T12:29:31.61
IV.TERO.HNN. ML:2.8 0.0019212656 0.8928 AML other m 2021-01-17T12:29:31.60
IV.TERO.HNE. ML:2.8 0.00192043625 0.8928 AML other m 2021-01-17T12:29:31.60
IV.SMA1.EHN. ML:1.3 0.00010712205 0.1984 AML other m 2021-01-17T12:29:31.65
IV.SMA1.EHE. ML:1.2 0.000077026995 0.16 AML other m 2021-01-17T12:29:31.87
IV.CESI.HHE. ML:1.4 0.0001239322 0.1792 AML other m 2021-01-17T12:29:31.81
IV.LNSS.HNE. ML:1.6 0.00020224605000000002 0.3776 AML other m 2021-01-17T12:29:32.27
IV.MF5.EHE. ML:1.6 0.0002041476 1.5648 AML other m 2021-01-17T12:29:32.87
IV.LNSS.HHE. ML:1.7 0.00020346190000000003 0.32 AML other m 2021-01-17T12:29:32.27
IV.MF5.EHN. ML:1.6 0.0001964645 0.4416 AML other m 2021-01-17T12:29:32.16
IV.GUMA.HNE. ML:1.9 0.0003693813 0.3392 AML other m 2021-01-17T12:29:32.72
IV.GUMA.HHE. ML:2.0 0.00044734335 0.32 AML other m 2021-01-17T12:29:32.73
IV.LNSS.HHN. ML:1.5 0.00014150000000000002 1.46 AML other m 2021-01-17T12:29:32.79
IV.SAP2.EHN. ML:2.3 0.0007775848000000001 0.16 AML other m 2021-01-17T12:29:33.10
IV.SAP2.EHE. ML:1.6 0.00016549999999999998 0.46 AML other m 2021-01-17T12:29:34.00
IV.TERO.HHN. ML:1.3 0.0000624 1.12 AML other m 2021-01-17T12:29:35.07
IV.LNSS.HNN. ML:1.6 0.0001692534 0.6016 AML other m 2021-01-17T12:29:36.19
IV.TERO.HHE. ML:1.3 0.00005865 0.38 AML other m 2021-01-17T12:29:36.70
IV.ASSB.HHN. ML:1.5 0.0000788 0.24 AML other m 2021-01-17T12:29:37.28
IV.MNTT.EHE. ML:2.2 0.000489977 0.16 AML other m 2021-01-17T12:29:37.73
IV.ASSB.HHE. ML:1.5 0.0000805 1.58 AML other m 2021-01-17T12:29:37.94
IV.MNTT.EHN. ML:1.8 0.00020450800000000003 1.8208 AML other m 2021-01-17T12:29:37.96
IV.GUMA.HNN. ML:2.3 0.0009446133 0.4128 AML other m 2021-01-17T12:29:39.05
IV.EL6.EHE. ML:1.4 0.000053438905 0.1344 AML other m 2021-01-17T12:29:39.28
IV.EL6.EHN. ML:1.4 0.000053796235 0.16 AML other m 2021-01-17T12:29:39.66
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