Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 20-01-2017 and time 22:41:26 (Italy) in region 8 km W Arquata del Tronto (AP)

A magnitude ML 2.0 earthquake occured in region: 8 km W Arquata del Tronto (AP), on

  • 20-01-2017 21:41:26 (UTC)
  • 20-01-2017 22:41:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7810, 13.2040 at 2 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
Arquata del Tronto AP 8 1178 1178
Norcia PG 9 4957 6135
Accumoli RI 10 667 6802
Montegallo AP 13 523 7325
Castelsantangelo sul Nera MC 13 281 7606
Montemonaco AP 17 604 8210
Cascia PG 17 3217 11427
Acquasanta Terme AP 17 2916 14343
Preci PG 17 724 15067
Amatrice RI 18 2657 17724
Cittareale RI 18 482 18206
Ussita MC 19 444 18650
Visso MC 19 1107 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
45 Km E of Foligno (57155 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
52 Km E of Terni (111501 inhabitants)
76 Km E of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
92 Km NW of Chieti (51815 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
97 Km S of Ancona (100861 inhabitants)
97 Km NE of Tivoli (56533 inhabitants)
99 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 2.0 2017-01-20
21:41:26		 42.7807 13.2035 2 2019-07-19
13:21:04		 Bollettino Sismico Italiano INGV 63635431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-01-20 21:41:26 ± 0.23
Latitude 42.7807 ± 0.0108
Longitude 13.2035 ± 0.0123
Depth (km) 2 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 63635431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1330
Semi-minor axis of confidence ellipse (meter) 790
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 34
Circular confidence region, given by single value of horizontal uncertainty (meter) 1330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 184
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.74554
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 27
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.4
Num. used stations 66
Type of magnitude ML
Reference to an origin 63635431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-12-04 14:39:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HHZ. 2017-01-20T21:41:44.92 0.6 undecidable manual S -2.43 0.86
IV.EL6.EHZ. 2017-01-20T21:41:44.41 1.0 undecidable manual S -1.48 0.44
IV.SNTG.HHZ. 2017-01-20T21:41:43.90 1.0 undecidable manual S -0.41 0.44
IV.SRES.HHZ. 2017-01-20T21:41:43.27 0.1 undecidable manual P 223 82.7505 50 1.35 54
IV.MOMA.HHZ. 2017-01-20T21:41:41.22 0.6 undecidable manual S -1.06 0.87
IV.T1220.EHZ. 2017-01-20T21:41:40.21 0.6 undecidable manual S 1.22 0.87
IV.GUMA.HHZ. 2017-01-20T21:41:39.63 0.1 undecidable manual S 1.39 1.74
IV.OFFI.HHZ. 2017-01-20T21:41:39.74 0.1 undecidable manual S -1.86 1.74
IV.FAGN.HHZ. 2017-01-20T21:41:38.60 1.0 positive manual P 151 64.9905 50 -0.59 20
IV.FIAM.HHZ. 2017-01-20T21:41:37.50 0.3 negative manual P 187 57.2982 50 -0.5 63
IV.FDMO.HHZ. 2017-01-20T21:41:37.40 1.0 undecidable manual S 0.6 0.44
IV.ARRO.EHZ. 2017-01-20T21:41:37.99 0.1 undecidable manual S -1.75 1.74
IV.T1222.EHZ. 2017-01-20T21:41:36.02 0.3 positive manual P 198 44.2224 92 0.64 61
IV.CAMP.HHZ. 2017-01-20T21:41:35.07 0.6 undecidable manual S 148 31.9458 93 -2.54 10
IV.T1215.EHZ. 2017-01-20T21:41:35.34 0.6 undecidable manual S 275 27.3504 93 -0.69 41
IV.GIGS.HHZ. 2017-01-20T21:41:35.05 1.0 undecidable manual P 140 47.2194 92 -0.94 18
IV.T1217.EHZ. 2017-01-20T21:41:34.13 0.6 undecidable manual S 251 23.4543 94 -0.54 44
IV.T1247.HHZ. 2017-01-20T21:41:34.11 0.1 positive manual P 168 38.4282 92 -0.11 95
IV.CESI.HHZ. 2017-01-20T21:41:33.35 0.3 positive manual P 316 34.743 92 -0.14 71
IV.CAMP.HHZ. 2017-01-20T21:41:33.17 0.6 negative manual P 148 31.9458 93 0.25 47
IV.RM33.EHZ. 2017-01-20T21:41:32.02 0.6 negative manual P 178 30.1476 93 -0.55 43
IV.T1218.EHZ. 2017-01-20T21:41:31.53 0.3 undecidable manual S 210 14.1747 96 0.05 75
IV.T1212.EHZ. 2017-01-20T21:41:31.53 0.6 undecidable manual S 256 13.3755 96 0.35 47
IV.T1215.EHZ. 2017-01-20T21:41:31.78 0.6 negative manual P 275 27.3504 93 -0.23 47
IV.LNSS.HHZ. 2017-01-20T21:41:30.88 0.3 negative manual P 214 23.754 94 -0.41 68
IV.T1217.EHZ. 2017-01-20T21:41:30.94 1.0 undecidable manual P 251 23.4543 94 -0.29 23
IV.T1216.EHZ. 2017-01-20T21:41:30.80 0.6 positive manual P 309 19.3695 94 0.38 46
IV.SMA1.EHZ. 2017-01-20T21:41:30.54 0.3 undecidable manual P 147 19.7691 94 0.03 75
IV.T1299.EHZ. 2017-01-20T21:41:30.29 0.3 negative manual P 158 17.4714 95 0.25 71
IV.T1218.EHZ. 2017-01-20T21:41:29.44 0.1 positive manual P 210 14.1747 96 0.05 100
IV.T1212.EHZ. 2017-01-20T21:41:29.49 0.6 undecidable manual P 256 13.3755 96 0.28 48
IV.T1202.EHZ. 2017-01-20T21:41:29.00 0.6 undecidable manual P 168 8.6802 100 0.7 42
IV.MC2.EHZ. 2017-01-20T21:41:14.79 3.0 undecidable manual S 0
IV.MC2.EHZ. 2017-01-20T21:41:11.98 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T1299.HNE. ML:2.7 0.0052450000000000005 0.48 AML other m 2017-01-20T21:41:33.87
IV.T1299.EHE. ML:2.7 0.00533 0.48 AML other m 2017-01-20T21:41:33.87
IV.T1299.EHN. ML:2.7 0.005415 0.36 AML other m 2017-01-20T21:41:33.81
IV.T1299.HNN. ML:2.7 0.005435000000000001 0.36 AML other m 2017-01-20T21:41:33.81
IV.SMA1.EHN. ML:3.2 0.015 0.2 AML other m 2017-01-20T21:41:34.11
IV.SMA1.EHE. ML:3.4 0.0225 0.18 AML other m 2017-01-20T21:41:34.17
IV.CAMP.HHE. ML:2.1 0.0006675 1 AML other m 2017-01-20T21:41:35.59
IV.RM33.HNE. ML:2.8 0.0035549999999999996 0.26 AML other m 2017-01-20T21:41:35.73
IV.RM33.EHE. ML:2.8 0.0036349999999999998 0.26 AML other m 2017-01-20T21:41:35.73
IV.RM33.EHN. ML:2.8 0.003205 0.26 AML other m 2017-01-20T21:41:35.59
IV.RM33.HNN. ML:2.8 0.0033900000000000002 0.26 AML other m 2017-01-20T21:41:35.59
IV.T1202.EHE. ML:2.3 0.0037749999999999997 0.72 AML other m 2017-01-20T21:41:36.61
IV.T1218.EHN. ML:2.2 0.0019049999999999998 0.2 AML other m 2017-01-20T21:41:36.79
IV.T1218.EHE. ML:1.8 0.000822 0.48 AML other m 2017-01-20T21:41:36.81
IV.T1218.HNE. ML:1.9 0.000975 0.48 AML other m 2017-01-20T21:41:36.81
IV.T1247.HHE. ML:2.6 0.0016200000000000001 0.36 AML other m 2017-01-20T21:41:37.32
IV.T1247.HHN. ML:2.6 0.001665 0.32 AML other m 2017-01-20T21:41:37.24
IV.T1218.HNN. ML:2.2 0.0019299999999999999 1.06 AML other m 2017-01-20T21:41:37.78
IV.T1202.EHN. ML:2.4 0.004225 0.92 AML other m 2017-01-20T21:41:37.74
IV.CAMP.HHN. ML:2.2 0.0008489999999999999 0.72 AML other m 2017-01-20T21:41:37.28
IV.LNSS.HHN. ML:2.4 0.00177 0.12 AML other m 2017-01-20T21:41:38.36
IV.LNSS.HHE. ML:2.4 0.00165 1.22 AML other m 2017-01-20T21:41:39.04
IV.T1212.EHN. ML:1.6 0.0006020000000000001 0.3 AML other m 2017-01-20T21:41:39.63
IV.T1212.HNN. ML:1.6 0.000586 1.24 AML other m 2017-01-20T21:41:40.63
IV.GIGS.HHE. ML:1.6 0.0001265 0.62 AML other m 2017-01-20T21:41:40.48
IV.T1212.HNE. ML:1.6 0.0005315000000000001 0.8 AML other m 2017-01-20T21:41:40.27
IV.T1212.EHE. ML:1.6 0.000483 0.8 AML other m 2017-01-20T21:41:40.67
IV.T1222.EHN. ML:2.2 0.0005265 0.34 AML other m 2017-01-20T21:41:40.78
IV.T1222.HNN. ML:2.2 0.000523 0.58 AML other m 2017-01-20T21:41:41.31
IV.T1222.EHE. ML:2.4 0.0007315 0.5 AML other m 2017-01-20T21:41:41.35
IV.T1222.HNE. ML:2.4 0.0007375000000000001 0.5 AML other m 2017-01-20T21:41:41.35
IV.T1217.EHN. ML:1.9 0.0005 0.1 AML other m 2017-01-20T21:41:41.70
IV.T1217.HNN. ML:1.9 0.0005164999999999999 0.1 AML other m 2017-01-20T21:41:41.70
IV.T1217.EHE. ML:1.9 0.0006205000000000001 0.06 AML other m 2017-01-20T21:41:41.76
IV.T1217.HNE. ML:1.9 0.000584 0.06 AML other m 2017-01-20T21:41:41.79
IV.GIGS.HHN. ML:1.6 0.0001185 0.38 AML other m 2017-01-20T21:41:42.35
IV.T1215.EHE. ML:1.6 0.0002385 0.86 AML other m 2017-01-20T21:41:43.51
IV.T1215.HNE. ML:1.6 0.00025550000000000003 0.84 AML other m 2017-01-20T21:41:43.93
IV.T1215.HNN. ML:1.6 0.00023449999999999998 0.14 AML other m 2017-01-20T21:41:43.76
IV.T1215.EHN. ML:1.7 0.000265 0.14 AML other m 2017-01-20T21:41:43.76
IV.ARRO.EHN. ML:2.0 0.00033400000000000004 0.18 AML other m 2017-01-20T21:41:45.16
IV.FAGN.HHN. ML:2.3 0.00035999999999999997 0.58 AML other m 2017-01-20T21:41:46.56
IV.FDMO.HHE. ML:1.3 0.00010135 1.3 AML other m 2017-01-20T21:41:46.93
IV.GUMA.HHE. ML:2.3 0.0010075000000000001 0.28 AML other m 2017-01-20T21:41:47.54
IV.ARRO.EHE. ML:1.9 0.00027249999999999996 0.2 AML other m 2017-01-20T21:41:48.06
IV.FDMO.HHN. ML:1.4 0.000142 0.78 AML other m 2017-01-20T21:41:48.16
IV.GUMA.HNN. ML:2.2 0.0008280000000000001 0.68 AML other m 2017-01-20T21:41:48.19
IV.GUMA.HHN. ML:2.2 0.0007555000000000001 1.5 AML other m 2017-01-20T21:41:48.94
IV.CESI.HHN. ML:1.5 0.00014000000000000001 0.98 AML other m 2017-01-20T21:41:48.85
IV.GUMA.HNE. ML:2.1 0.0005795 0.7 AML other m 2017-01-20T21:41:49.23
IV.CESI.HHE. ML:1.4 0.00009769999999999999 0.72 AML other m 2017-01-20T21:41:50.44
IV.FAGN.HHE. ML:2.3 0.0003775 0.32 AML other m 2017-01-20T21:41:50.62
IV.MOMA.HHN. ML:2.0 0.0002785 0.18 AML other m 2017-01-20T21:41:51.46
IV.MOMA.HHE. ML:2.1 0.000343 0.32 AML other m 2017-01-20T21:41:51.44
IV.MOMA.HNE. ML:2.1 0.00033350000000000003 0.32 AML other m 2017-01-20T21:41:51.60
IV.T1220.EHE. ML:2.2 0.0005809999999999999 0.56 AML other m 2017-01-20T21:41:51.94
IV.T1220.HNE. ML:2.2 0.000594 0.56 AML other m 2017-01-20T21:41:51.94
IV.MOMA.HNN. ML:2.1 0.0003325 0.84 AML other m 2017-01-20T21:41:52.04
IV.T1220.HNN. ML:2.0 0.0003855 1.26 AML other m 2017-01-20T21:41:52.14
IV.T1220.EHN. ML:2.0 0.00040500000000000003 1.26 AML other m 2017-01-20T21:41:52.14
IV.SRES.HHN. ML:1.7 0.00006309999999999999 0.42 AML other m 2017-01-20T21:41:55.91
IV.SNTG.HHE. ML:1.3 0.0000465 0.88 AML other m 2017-01-20T21:41:56.98
IV.SRES.HHE. ML:1.7 0.0000593 0.88 AML other m 2017-01-20T21:41:57.74
IV.CING.HHN. ML:1.7 0.00009884999999999999 0.72 AML other m 2017-01-20T21:41:58.20
IV.EL6.EHE. ML:1.8 0.000134 0.16 AML other m 2017-01-20T21:41:58.66
IV.CING.HHE. ML:1.8 0.000118 0.24 AML other m 2017-01-20T21:41:58.72
IV.EL6.EHN. ML:1.8 0.0001475 0.12 AML other m 2017-01-20T21:41:58.91
IV.SNTG.HHN. ML:1.5 0.00006484999999999999 0.7 AML other m 2017-01-20T21:42:00.53
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