Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 25-08-2016 and time 08:44:18 (Italy) in region 1 km N Amatrice (RI)

A magnitude ML 1.4 earthquake occured in region: 1 km N Amatrice (RI), on

  • 25-08-2016 06:44:18 (UTC)
  • 25-08-2016 08:44:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6430, 13.2920 at 1 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 2 2657 2657
Accumoli RI 7 667 3324
Cittareale RI 11 482 3806
Campotosto AQ 11 542 4348
Capitignano AQ 14 665 5013
Montereale AQ 14 2581 7594
Arquata del Tronto AP 15 1178 8772
Acquasanta Terme AP 17 2916 11688
Cortino TE 18 656 12344
Crognaleto TE 19 1297 13641
Borbona RI 20 617 14258
Valle Castellana TE 20 977 15235
Rocca Santa Maria TE 20 537 15772

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km N of L'Aquila (69753 inhabitants)
34 Km W of Teramo (54892 inhabitants)
54 Km E of Terni (111501 inhabitants)
59 Km SE of Foligno (57155 inhabitants)
72 Km W of Montesilvano (53738 inhabitants)
78 Km W of Pescara (121014 inhabitants)
79 Km W of Chieti (51815 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
90 Km SE of Perugia (166134 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 1.4 2016-08-25
06:44:18		 42.6433 13.2923 1 2019-02-12
13:57:17		 Bollettino Sismico Italiano INGV 30141611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-08-25 06:44:18 ± 0.15
Latitude 42.6433 ± 0.0081
Longitude 13.2923 ± 0.0086
Depth (km) 1 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 30141611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 910
Semi-minor axis of confidence ellipse (meter) 680
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 14
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) 103
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 3.04870
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.5
Num. used stations 5
Type of magnitude ML
Reference to an origin 30141611
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2016-10-13 05:55:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FIU.EHZ. 2016-08-25T06:45:48.99 3.0 undecidable manual Sg 338.4057 21.26 0
SI.RISI.HHZ. 2016-08-25T06:45:40.76 3.0 negative manual Pg 20.559999 0
IV.GROG.HHZ. 2016-08-25T06:45:40.99 3.0 undecidable manual Sg 19.889999 0
IV.ZONE.HHZ. 2016-08-25T06:45:27.97 3.0 positive manual Pg 17.809999 0
GU.RORO.HHZ. 2016-08-25T06:45:24.94 3.0 negative manual Pg 17.719999 0
AC.SRN.HHZ. 2016-08-25T06:45:20.87 3.0 undecidable manual Pn -6.2 0
IV.SARZ.HHZ. 2016-08-25T06:45:11.08 3.0 positive manual Pn 3.94 0
IV.COR1.EHZ. 2016-08-25T06:44:59.99 3.0 undecidable manual Sn 1.52 0
IV.FIU.EHZ. 2016-08-25T06:44:52.13 3.0 undecidable manual Pn 338.4057 1.35 0
TV.SF01.EHZ. 2016-08-25T06:44:50.99 3.0 undecidable manual Sn 1.37 0
IV.PTRJ.HNZ. 2016-08-25T06:44:47.99 3.0 undecidable manual Sg 2 0
IV.MRLC.HHZ. 2016-08-25T06:44:43.40 3.0 positive manual Pg 4.11 0
IV.LPEL.HHZ. 2016-08-25T06:44:34.99 3.0 undecidable manual Sn -4.18 0
IV.CAFI.HHZ. 2016-08-25T06:44:29.36 3.0 undecidable manual Pn -3.45 0
IV.CSP1.EHZ. 2016-08-25T06:44:28.03 1.0 negative manual P 352 50.2164 91 -0.52 22
IV.FDMO.HHN. 2016-08-25T06:44:28.75 0.6 undecidable manual P 339 46.7199 91 0.91 38
IV.TERO.HHZ. 2016-08-25T06:44:26.75 0.6 undecidable manual S 95 25.5522 92 -0.59 45
IV.LNSS.HHZ. 2016-08-25T06:44:25.29 0.6 undecidable manual S 258 21.0678 92 -0.5 47
IV.RM33.EHZ. 2016-08-25T06:44:24.23 0.6 undecidable manual S 203 16.1727 92 0.12 52
IV.GIGS.HHZ. 2016-08-25T06:44:24.59 1.0 undecidable manual P 133 31.1466 91 -0.14 25
IV.TERO.HHZ. 2016-08-25T06:44:23.59 0.6 undecidable manual P 95 25.5522 92 -0.01 52
IV.CAMP.HHZ. 2016-08-25T06:44:23.91 0.6 undecidable manual S 141 15.2736 93 0.12 52
IV.NRCA.HHZ. 2016-08-25T06:44:23.77 0.6 negative manual P 326 25.6521 92 0.16 50
IV.RM33.EHZ. 2016-08-25T06:44:22.16 0.6 undecidable manual P 203 16.1727 92 0.43 48
IV.LNSS.HHZ. 2016-08-25T06:44:22.48 0.1 positive manual P 258 21.0678 92 -0.22 100
IV.SGG.HHZ. 2016-08-25T06:44:22.85 3.0 undecidable manual Pn -3.11 0
IV.CAMP.HHZ. 2016-08-25T06:44:21.79 0.6 undecidable manual P 141 15.2736 93 0.25 50
IV.VIVA.HHZ. 2016-08-25T06:44:17.04 3.0 undecidable manual P 0.63 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAMP.HHE. ML:0.8 0.0000712 0.18 AML other m 2016-08-25T06:44:24.11
IV.CAMP.HHN. ML:0.7 0.00006214999999999999 0.18 AML other m 2016-08-25T06:44:28.42
IV.LNSS.HHE. ML:1.2 0.0001395 0.92 AML other m 2016-08-25T06:44:31.28
IV.LNSS.HHN. ML:1.3 0.0001495 0.2 AML other m 2016-08-25T06:45:00.48
IV.NRCA.HNN. ML:2.3 0.0012015 0.14 AML other m 2016-08-25T06:45:13.55
IV.NRCA.HHN. ML:2.3 0.0012900000000000001 0.46 AML other m 2016-08-25T06:45:13.85
IV.NRCA.HHE. ML:2.3 0.001265 0.46 AML other m 2016-08-25T06:45:13.86
IV.NRCA.HNE. ML:2.2 0.0011105 0.46 AML other m 2016-08-25T06:45:13.86
IV.RM33.EHN. ML:1.3 0.00021700000000000002 0.2 AML other m 2016-08-25T06:44:24.76
IV.RM33.EHE. ML:1.2 0.0001635 0.16 AML other m 2016-08-25T06:44:24.74
IV.TERO.HHN. ML:1.4 0.00016 0.1 AML other m 2016-08-25T06:44:31.50
IV.TERO.HHE. ML:1.3 0.0001365 0.18 AML other m 2016-08-25T06:44:30.58
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
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