Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 16-05-2013 and time 06:03:46 (Italy) in region 3 km W Amatrice (RI)

A magnitude ML 1.5 earthquake occured in region: 3 km W Amatrice (RI), on

  • 16-05-2013 04:03:46 (UTC)
  • 16-05-2013 06:03:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6340, 13.2500 at 13 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
Amatrice RI 3 2657 2657
Accumoli RI 7 667 3324
Cittareale RI 8 482 3806
Montereale AQ 12 2581 6387
Campotosto AQ 13 542 6929
Capitignano AQ 13 665 7594
Arquata del Tronto AP 16 1178 8772
Borbona RI 17 617 9389
Posta RI 18 694 10083
Cagnano Amiterno AQ 20 1369 11452
Acquasanta Terme AP 20 2916 14368

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
50 Km E of Terni (111501 inhabitants)
57 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
81 Km W of Pescara (121014 inhabitants)
82 Km W of Chieti (51815 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
88 Km SE of Perugia (166134 inhabitants)
97 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 1.5 2013-05-16
04:03:46		 42.6343 13.25 13 2015-01-20
11:26:02		 Bollettino Sismico Italiano INGV 3557941
Reviewed
Rev100 		ML 1.4 2013-05-16
04:03:46		 42.6268 13.2458 14 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 3530641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-05-16 04:03:46 ± 0.12
Latitude 42.6343 ± 0.0072
Longitude 13.2500 ± 0.0086
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 3557941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 908
Semi-minor axis of confidence ellipse (meter) 414
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 212
Circular confidence region, given by single value of horizontal uncertainty (meter) 910.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 167
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 0.45865
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 7
Type of magnitude ML
Reference to an origin 3530641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-05-16 04:10:53

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 3557941
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 12:55:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2013-05-16T04:04:03.03 0.3 undecidable manual S 356 50.9157 93 0.2 69
IV.CESI.HHZ. 2013-05-16T04:04:02.67 0.3 undecidable manual S 326 49.8168 93 0.13 70
IV.CESI.HHZ. 2013-05-16T04:03:56.31 0.3 undecidable manual P 326 49.8168 93 0.43 66
IV.TERO.HHZ. 2013-05-16T04:03:56.68 0.3 undecidable manual S 92 28.9488 98 -0.31 70
IV.CSP1.EHZ. 2013-05-16T04:03:55.90 0.6 positive manual P 356 50.9157 93 -0.15 47
IV.NRCA.HHZ. 2013-05-16T04:03:55.55 0.3 undecidable manual S 333 24.6531 100 -0.33 71
IV.GUMA.HHZ. 2013-05-16T04:03:55.90 0.1 negative manual P 8 48.0186 93 0.29 91
IV.FDMO.HHZ. 2013-05-16T04:03:55.22 0.3 undecidable manual P 344 46.5201 94 -0.16 71
IV.ARRO.EHZ. 2013-05-16T04:03:54.28 0.3 undecidable manual P 261 40.0266 95 -0.1 72
IV.TERO.HHZ. 2013-05-16T04:03:52.60 0.1 positive manual P 92 28.9488 98 -0.08 98
IV.SMA1.EHZ. 2013-05-16T04:03:51.77 0.3 undecidable manual S 94 6.993 145 0.01 77
IV.NRCA.HHZ. 2013-05-16T04:03:51.82 0.1 positive manual P 333 24.6531 100 -0.22 97
IV.SMA1.EHZ. 2013-05-16T04:03:49.84 0.1 positive manual P 94 6.993 145 0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:1.2 0.00005405 0.6 AML other m 2013-05-16T04:04:01.59
IV.ARRO.EHE. ML:1.3 0.0000648 0.26 AML other m 2013-05-16T04:04:02.19
IV.FIAM.HHE. ML:1.4 0.00007425 1.58 AML other m 2013-05-16T04:04:01.61
IV.GUMA.HHN. ML:1.8 0.000155 1.54 AML other m 2013-05-16T04:04:05.60
IV.NRCA.HHN. ML:1.7 0.000256 0.4 AML other m 2013-05-16T04:03:55.73
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