Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 21-03-2017 and time 21:04:50 (Italy) in region 5 km W Arquata del Tronto (AP)

A magnitude ML 1.3 earthquake occured in region: 5 km W Arquata del Tronto (AP), on

  • 21-03-2017 20:04:50 (UTC)
  • 21-03-2017 21:04:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7640, 13.2330 at 12 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.

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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 5 1178 1178
Accumoli RI 8 667 1845
Norcia PG 12 4957 6802
Montegallo AP 12 523 7325
Acquasanta Terme AP 15 2916 10241
Amatrice RI 16 2657 12898
Castelsantangelo sul Nera MC 16 281 13179
Montemonaco AP 17 604 13783
Cittareale RI 17 482 14265
Cascia PG 19 3217 17482

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Teramo (54892 inhabitants)
48 Km N of L'Aquila (69753 inhabitants)
48 Km E of Foligno (57155 inhabitants)
53 Km E of Terni (111501 inhabitants)
79 Km E of Perugia (166134 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
87 Km W of Pescara (121014 inhabitants)
89 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
98 Km S of Ancona (100861 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
Reviewed
Rev100 		ML 1.3 2017-03-21
20:04:50		 42.7635 13.2328 12 2017-03-21
20:37:54		 Sala Sismica INGV-Roma 42754241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-21 20:04:50 ± 0.04
Latitude 42.7635 ± 0.0018
Longitude 13.2328 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 42754241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 280
Semi-minor axis of confidence ellipse (meter) 29
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 71
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.57377
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 21
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 42754241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-21 20:37:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PE3.EHZ. 2017-03-21T20:05:28.43 3.0 undecidable manual S 0.81 0
IV.SRES.HHZ. 2017-03-21T20:05:13.03 1.0 undecidable manual S -4.06 0
IV.T1220.EHZ. 2017-03-21T20:05:04.07 0.6 undecidable manual S 343 40.2264 91 0.22 45
IV.T1222.EHZ. 2017-03-21T20:05:04.44 0.3 undecidable manual S 202 43.2234 91 -0.23 67
IV.T1219.EHZ. 2017-03-21T20:05:03.20 0.3 undecidable manual S 330 37.3293 91 0.11 70
IV.T1247.HHZ. 2017-03-21T20:05:03.11 0.3 undecidable manual S 171 36.1416 91 0.35 66
IV.T1211.EHZ. 2017-03-21T20:05:03.89 0.6 undecidable manual S 230 40.0266 91 0.08 47
IV.TERO.HHZ. 2017-03-21T20:05:02.10 0.3 undecidable manual S 117 34.0437 91 -0.11 71
IV.EL6.EHZ. 2017-03-21T20:05:02.35 1.0 negative manual P 350 63.6918 91 0.46 21
IV.FDMO.HHZ. 2017-03-21T20:05:01.86 0.3 undecidable manual S 339 32.5452 92 0.06 71
IV.MOMA.HHZ. 2017-03-21T20:05:00.72 0.6 undecidable manual P 275 54.1014 91 0.29 44
IV.T1256.HHZ. 2017-03-21T20:05:00.26 0.6 undecidable manual S 359 26.9508 92 -0.06 48
IV.RM33.EHZ. 2017-03-21T20:05:00.71 0.3 undecidable manual S 183 28.2495 92 0.04 72
IV.T1217.EHZ. 2017-03-21T20:04:59.80 0.3 undecidable manual S 257 25.2525 92 -0.06 72
IV.T1211.EHZ. 2017-03-21T20:04:58.21 0.1 undecidable manual P 230 40.0266 91 -0.05 94
IV.T1220.EHZ. 2017-03-21T20:04:58.37 0.1 undecidable manual P 343 40.2264 91 0.09 93
IV.T1222.EHZ. 2017-03-21T20:04:58.63 0.1 undecidable manual P 202 43.2234 91 -0.12 92
IV.SMA1.EHZ. 2017-03-21T20:04:57.33 0.3 undecidable manual S 150 16.9719 98 -0.33 70
IV.T1247.HHZ. 2017-03-21T20:04:57.67 0.1 undecidable manual P 171 36.1416 91 0.02 95
IV.T1299.EHZ. 2017-03-21T20:04:57.17 0.3 undecidable manual S 164 14.874 103 0.06 73
IV.MC2.EHZ. 2017-03-21T20:04:57.72 0.3 undecidable manual S 348 16.7721 98 0.11 73
IV.T1219.EHZ. 2017-03-21T20:04:57.74 0.3 undecidable manual P 330 37.3293 91 -0.1 70
IV.TERO.HHZ. 2017-03-21T20:04:57.15 0.1 undecidable manual P 117 34.0437 91 -0.18 93
IV.T1212.EHZ. 2017-03-21T20:04:57.08 0.3 undecidable manual S 265 15.3735 101 -0.16 72
IV.T1256.HHZ. 2017-03-21T20:04:56.17 0.1 undecidable manual P 359 26.9508 92 -0.06 96
IV.RM33.EHZ. 2017-03-21T20:04:56.44 0.1 undecidable manual P 183 28.2495 92 0 97
IV.T1218.EHZ. 2017-03-21T20:04:56.94 0.3 undecidable manual S 223 14.0748 105 0.02 74
IV.FDMO.HHZ. 2017-03-21T20:04:56.72 0.6 undecidable manual P 339 32.5452 92 -0.37 44
IV.T1245.HHZ. 2017-03-21T20:04:55.84 0.3 undecidable manual S 341 10.9779 119 -0.29 71
IV.T1217.EHZ. 2017-03-21T20:04:55.94 0.1 undecidable manual P 257 25.2525 92 -0.03 96
IV.T1216.EHZ. 2017-03-21T20:04:55.43 0.1 undecidable manual P 309 22.3554 93 -0.11 95
IV.T1212.EHZ. 2017-03-21T20:04:54.54 0.1 undecidable manual P 265 15.3735 101 0.08 98
IV.SMA1.EHZ. 2017-03-21T20:04:54.70 0.1 undecidable manual P 150 16.9719 98 0 98
IV.T1299.EHZ. 2017-03-21T20:04:54.69 0.1 undecidable manual P 164 14.874 103 0.3 93
IV.MC2.EHZ. 2017-03-21T20:04:54.77 0.1 undecidable manual P 348 16.7721 98 0.1 97
IV.T1218.EHZ. 2017-03-21T20:04:54.39 0.1 undecidable manual P 223 14.0748 105 0.12 97
IV.T1245.HHZ. 2017-03-21T20:04:53.90 0.1 undecidable manual P 341 10.9779 119 0.08 98
IV.T1214.EHZ. 2017-03-21T20:04:53.03 0.1 undecidable manual P 257 1.998 167 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EL6.EHN. ML:1.8 0.0001365 0.42 AML other m 2017-03-21T20:05:26.42
IV.EL6.EHE. ML:2.3 0.00040149999999999995 0.42 AML other m 2017-03-21T20:05:31.67
IV.FDMO.HHN. ML:0.9 0.0000363 0.16 AML other m 2017-03-21T20:05:02.06
IV.FDMO.HHE. ML:0.8 0.0000307 0.76 AML other m 2017-03-21T20:05:02.74
IV.MOMA.HHE. ML:1.2 0.00003315 0.6 AML other m 2017-03-21T20:05:09.29
IV.MOMA.HHN. ML:1.1 0.0000303 1.3 AML other m 2017-03-21T20:05:10.30
IV.RM33.EHN. ML:1.2 0.0000844 0.96 AML other m 2017-03-21T20:05:01.48
IV.RM33.EHE. ML:1.3 0.00009944999999999999 1.2 AML other m 2017-03-21T20:05:01.90
IV.SMA1.EHN. ML:1.1 0.00010535 0.32 AML other m 2017-03-21T20:04:57.70
IV.SMA1.EHE. ML:1.0 0.00007630000000000001 0.84 AML other m 2017-03-21T20:04:59.39
IV.T1212.HNE. ML:1.7 0.00041500000000000006 0.16 AML other m 2017-03-21T20:04:57.36
IV.T1212.EHE. ML:1.6 0.000393 0.16 AML other m 2017-03-21T20:04:57.36
IV.T1212.EHN. ML:1.8 0.000633 0.2 AML other m 2017-03-21T20:04:57.25
IV.T1212.HNN. ML:1.8 0.0006225 0.2 AML other m 2017-03-21T20:04:57.25
IV.T1216.EHE. ML:1.2 0.00010856 0.08 AML other m 2017-03-21T20:05:05.47
IV.T1216.EHN. ML:1.3 0.00011899999999999999 0.94 AML other m 2017-03-21T20:05:05.46
IV.T1217.EHN. ML:1.1 0.00007625 1.74 AML other m 2017-03-21T20:04:59.94
IV.T1217.EHE. ML:1.0 0.0000504 1.68 AML other m 2017-03-21T20:05:00.13
IV.T1218.HNN. ML:2.1 0.0011505 0.16 AML other m 2017-03-21T20:04:57.24
IV.T1218.EHN. ML:2.1 0.001141 0.18 AML other m 2017-03-21T20:04:57.24
IV.T1218.HNE. ML:1.8 0.0005925 0.22 AML other m 2017-03-21T20:04:57.27
IV.T1218.EHE. ML:1.8 0.000569 0.22 AML other m 2017-03-21T20:04:57.17
IV.T1245.HHE. ML:1.4 0.00029 0.2 AML other m 2017-03-21T20:04:58.15
IV.T1245.HHN. ML:1.6 0.0004525 0.44 AML other m 2017-03-21T20:04:56.52
IV.T1247.HHN. ML:1.4 0.00010685 0.16 AML other m 2017-03-21T20:05:03.41
IV.T1247.HHE. ML:1.4 0.00009455 0.38 AML other m 2017-03-21T20:05:04.67
IV.T1256.HHN. ML:1.0 0.0000516 0.16 AML other m 2017-03-21T20:05:02.09
IV.T1256.HHE. ML:0.8 0.0000361 0.82 AML other m 2017-03-21T20:05:00.65
IV.T1299.EHE. ML:1.1 0.0001135 0.1 AML other m 2017-03-21T20:04:57.53
IV.T1299.EHN. ML:1.2 0.0001291 0.3 AML other m 2017-03-21T20:04:57.52
IV.TERO.HHE. ML:1.1 0.0000493 0.34 AML other m 2017-03-21T20:05:02.90
IV.TERO.HHN. ML:1.1 0.00005545 1.24 AML other m 2017-03-21T20:05:02.75
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