Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 04-03-2017 and time 21:40:12 (Italy) in region 5 km W Amatrice (RI)

A magnitude ML 1.0 earthquake occured in region: 5 km W Amatrice (RI), on

  • 04-03-2017 20:40:12 (UTC)
  • 04-03-2017 21:40:12 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6300, 13.2280 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.

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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
Amatrice RI 5 2657 2657
Cittareale RI 6 482 3139
Accumoli RI 8 667 3806
Montereale AQ 12 2581 6387
Capitignano AQ 14 665 7052
Campotosto AQ 14 542 7594
Borbona RI 15 617 8211
Posta RI 16 694 8905
Arquata del Tronto AP 17 1178 10083
Cagnano Amiterno AQ 19 1369 11452

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NW of L'Aquila (69753 inhabitants)
39 Km W of Teramo (54892 inhabitants)
48 Km E of Terni (111501 inhabitants)
56 Km SE of Foligno (57155 inhabitants)
77 Km W of Montesilvano (53738 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
83 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
87 Km SE of Perugia (166134 inhabitants)
95 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 1.0 2017-03-04
20:40:12		 42.6303 13.2277 11 2017-03-04
20:48:29		 Sala Sismica INGV-Roma 41971341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-04 20:40:12 ± 0.04
Latitude 42.6303 ± 0.0018
Longitude 13.2277 ± 0.0024
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 41971341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 197
Semi-minor axis of confidence ellipse (meter) 181
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 152
Circular confidence region, given by single value of horizontal uncertainty (meter) 200.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.29138
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 41971341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-04 20:48:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2017-03-04T20:40:29.92 3.0 undecidable manual S -0.8 0
IV.T1211.EHZ. 2017-03-04T20:40:23.91 0.3 undecidable manual S 251 32.3454 50 0.02 72
IV.LNSS.HHZ. 2017-03-04T20:40:19.36 0.3 undecidable manual S 259 15.5733 125 0.04 74
IV.T1211.EHZ. 2017-03-04T20:40:19.05 0.1 undecidable manual P 251 32.3454 50 -0.13 94
IV.T1214.EHZ. 2017-03-04T20:40:18.96 0.3 undecidable manual S 354 14.3745 127 -0.03 74
IV.RM33.EHZ. 2017-03-04T20:40:18.66 0.6 undecidable manual S 185 13.4754 129 -0.09 49
IV.SMA1.EHZ. 2017-03-04T20:40:17.56 0.3 undecidable manual S 90 8.7801 141 -0.01 75
IV.T1218.EHZ. 2017-03-04T20:40:17.84 0.3 undecidable manual S 296 10.1787 137 -0.05 74
IV.T1299.EHZ. 2017-03-04T20:40:16.56 0.6 undecidable manual S 85 4.4955 157 -0.23 48
IV.RM33.EHZ. 2017-03-04T20:40:16.24 0.1 undecidable manual P 185 13.4754 129 0.04 99
IV.T1241.EHZ. 2017-03-04T20:40:16.06 3.0 negative manual P 0.7 0
IV.LNSS.HHZ. 2017-03-04T20:40:16.60 0.1 undecidable manual P 259 15.5733 125 0.06 98
IV.T1214.EHZ. 2017-03-04T20:40:16.35 0.1 undecidable manual P 354 14.3745 127 0 99
IV.T1218.EHZ. 2017-03-04T20:40:15.76 0.1 undecidable manual P 296 10.1787 137 0.04 99
IV.T1299.EHZ. 2017-03-04T20:40:15.14 0.1 undecidable manual P 85 4.4955 157 0.06 100
IV.SMA1.EHZ. 2017-03-04T20:40:15.63 0.1 undecidable manual P 90 8.7801 141 0.1 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:1.0 0.00007843795 0.1408 AML other m 2017-03-04T20:40:19.59
IV.LNSS.HHE. ML:1.1 0.00010970250000000001 1.6256 AML other m 2017-03-04T20:40:19.47
IV.RM33.EHE. ML:0.8 0.00006143896 0.1792 AML other m 2017-03-04T20:40:19.22
IV.SMA1.EHE. ML:1.2 0.0002213324 0.2304 AML other m 2017-03-04T20:40:17.80
IV.T1218.EHN. ML:1.3 0.00022933791 0.2304 AML other m 2017-03-04T20:40:18.06
IV.T1218.HNE. ML:0.9 0.00010053635499999999 0.0896 AML other m 2017-03-04T20:40:17.91
IV.T1218.EHE. ML:1.0 0.00011092519 1.6 AML other m 2017-03-04T20:40:17.91
IV.T1218.HNN. ML:1.3 0.00021776961649999998 0.2048 AML other m 2017-03-04T20:40:18.05
IV.T1299.EHE. ML:0.7 0.00007714023 1.2032 AML other m 2017-03-04T20:40:16.97
IV.T1299.HNN. ML:1.1 0.0002056465 1.1776 AML other m 2017-03-04T20:40:14.60
IV.T1299.EHN. ML:0.7 0.00008584229 0.128 AML other m 2017-03-04T20:40:16.61
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