Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 17-12-2015 and time 06:32:42 (UTC) in region 5 km N Posta (RI)

A magnitude ML 1.6 earthquake occured in region: 5 km N Posta (RI), on

  • 17-12-2015 06:32:42 (UTC)
  • 17-12-2015 07:32:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5640, 13.0820 at 8 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
Posta RI 5 694 694
Borbona RI 7 617 1311
Cittareale RI 9 482 1793
Leonessa RI 10 2435 4228
Micigliano RI 13 127 4355
Montereale AQ 14 2581 6936
Monteleone di Spoleto PG 15 599 7535
Antrodoco RI 16 2588 10123
Cagnano Amiterno AQ 17 1369 11492
Poggio Bustone RI 17 2055 13547
Borgo Velino RI 18 972 14519
Cantalice RI 18 2755 17274
Cascia PG 18 3217 20491
Amatrice RI 19 2657 23148
Capitignano AQ 19 665 23813
Castel Sant'Angelo RI 19 1308 25121
Rivodutri RI 19 1253 26374
Polino TR 20 233 26607

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NW of L'Aquila (69753 inhabitants)
36 Km E of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
54 Km SE of Foligno (57155 inhabitants)
69 Km NE of Guidonia Montecelio (88673 inhabitants)
71 Km NE of Tivoli (56533 inhabitants)
82 Km E of Viterbo (67173 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
89 Km NE of Roma (2864731 inhabitants)
92 Km W of Chieti (51815 inhabitants)
93 Km W of Pescara (121014 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 1.6 2015-12-17
06:32:42		 42.5637 13.0822 8 2016-02-19
13:23:08		 Bollettino Sismico Italiano INGV 23276371
Reviewed
Rev100 		ML 1.7 2015-12-17
06:32:42		 42.5607 13.0818 9 2015-12-17
06:37:52		 Sala Sismica INGV-Roma 22725031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-12-17 06:32:42 ± 0.09
Latitude 42.5637 ± 0.0063
Longitude 13.0822 ± 0.0061
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 23276371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 674
Semi-minor axis of confidence ellipse (meter) 410
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 199
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.04946
Epicentral distance of station farthest from the epicenter (degree) 0.79320
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 23276371
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2016-02-15 16:44:07

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 22725031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-12-17 06:37:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2015-12-17T06:33:02.56 0.6 undecidable manual S 327 63.2922 50 0.12 44
IV.CSP1.EHZ. 2015-12-17T06:33:01.93 0.6 undecidable manual S 10 59.3961 50 0.53 41
IV.FDMO.HHZ. 2015-12-17T06:32:59.90 0.6 undecidable manual S 0 52.503 50 0.36 43
IV.MOMA.HHZ. 2015-12-17T06:32:59.69 0.6 undecidable manual S 302 49.5171 50 0.94 35
IV.MGAB.HHZ. 2015-12-17T06:32:58.59 0.3 undecidable manual P 296 88.0452 50 0.8 52
IV.TERO.HHZ. 2015-12-17T06:32:56.58 0.3 undecidable manual S 81 43.1235 50 -0.46 64
IV.FIAM.HHZ. 2015-12-17T06:32:54.32 0.6 undecidable manual S 175 32.9448 104 0.1 47
IV.CSP1.EHZ. 2015-12-17T06:32:53.07 0.3 undecidable manual P 10 59.3961 50 -0.32 65
IV.ASSB.HHZ. 2015-12-17T06:32:53.58 0.3 undecidable manual P 327 63.2922 50 -0.41 63
IV.CAMP.HHE. 2015-12-17T06:32:52.36 0.3 undecidable manual S 96 26.8509 107 0.16 71
IV.MOMA.HHZ. 2015-12-17T06:32:52.16 0.3 undecidable manual P 302 49.5171 50 0.3 66
IV.FDMO.HHZ. 2015-12-17T06:32:51.90 0.1 undecidable manual P 0 52.503 50 -0.41 85
IV.GIGS.HHN. 2015-12-17T06:32:50.57 0.3 undecidable manual P 107 41.9247 50 -0.12 69
IV.TERO.HHZ. 2015-12-17T06:32:50.40 0.3 undecidable manual P 81 43.1235 50 -0.47 64
IV.SMA1.EHZ. 2015-12-17T06:32:50.99 0.6 undecidable manual S 70 21.9669 111 0.41 45
IV.CESX.HHE. 2015-12-17T06:32:50.41 0.6 undecidable manual P 277 40.7259 50 -0.1 47
IV.FIAM.HHZ. 2015-12-17T06:32:48.96 0.3 undecidable manual P 175 32.9448 104 -0.28 68
IV.CAMP.HHE. 2015-12-17T06:32:48.10 0.3 undecidable manual P 96 26.8509 107 0.02 73
IV.NRCA.HHZ. 2015-12-17T06:32:48.37 0.3 undecidable manual P 5 30.0477 105 -0.32 68
IV.SMA1.EHZ. 2015-12-17T06:32:47.43 0.1 undecidable manual P 70 21.9669 111 0.28 93
IV.RM33.EHZ. 2015-12-17T06:32:47.89 0.3 undecidable manual S 119 12.3765 124 0.28 71
IV.ARRO.EHZ. 2015-12-17T06:32:47.65 0.3 undecidable manual P 274 25.9518 108 -0.24 70
IV.RM33.EHZ. 2015-12-17T06:32:45.62 0.1 undecidable manual P 119 12.3765 124 0.19 96
IV.LNSS.HHZ. 2015-12-17T06:32:45.62 0.3 undecidable manual S 322 5.4945 146 -0.27 72
IV.LNSS.HHZ. 2015-12-17T06:32:44.38 0.1 undecidable manual P 322 5.4945 146 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:1.5 0.0000674 0.88 AML other m 2015-12-17T06:33:04.43
IV.ASSB.HHN. ML:1.5 0.0000582 1.26 AML other m 2015-12-17T06:33:06.03
IV.FDMO.HHN. ML:1.4 0.00006254999999999999 1.02 AML other m 2015-12-17T06:33:00.44
IV.FDMO.HHE. ML:1.5 0.00008015 1.02 AML other m 2015-12-17T06:33:00.80
IV.MOMA.HHN. ML:1.8 0.0001905 0.22 AML other m 2015-12-17T06:33:00.54
IV.MOMA.HHE. ML:1.8 0.000158 0.22 AML other m 2015-12-17T06:33:00.99
IV.RM33.HNE. ML:1.7 0.0006919999999999999 1.36 AML other m 2015-12-17T06:32:49.66
IV.RM33.EHE. ML:1.7 0.0006955 1.38 AML other m 2015-12-17T06:32:50.35
IV.RM33.HNN. ML:1.8 0.000739 0.22 AML other m 2015-12-17T06:32:48.05
IV.RM33.EHN. ML:1.8 0.0007345 0.22 AML other m 2015-12-17T06:32:48.05
IV.SMA1.EHE. ML:2.0 0.0007669999999999999 0.58 AML other m 2015-12-17T06:32:51.74
IV.SMA1.EHN. ML:1.7 0.0003665 0.52 AML other m 2015-12-17T06:32:51.88
IV.TERO.HHE. ML:1.0 0.000029500000000000002 0.46 AML other m 2015-12-17T06:32:58.74
IV.TERO.HHN. ML:1.0 0.0000357 1.46 AML other m 2015-12-17T06:33:02.03
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