Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 13-12-2019 and time 00:46:50 (Italy) in region 2 km NE Accumoli (RI)

A magnitude ML 1.1 earthquake occured in region: 2 km NE Accumoli (RI), on

  • 12-12-2019 23:46:50 (UTC)
  • 13-12-2019 00:46:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7150, 13.2610 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
Accumoli RI 2 667 667
Arquata del Tronto AP 7 1178 1845
Amatrice RI 10 2657 4502
Cittareale RI 14 482 4984
Acquasanta Terme AP 14 2916 7900
Montegallo AP 15 523 8423
Norcia PG 16 4957 13380
Valle Castellana TE 20 977 14357
Campotosto AQ 20 542 14899

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Teramo (54892 inhabitants)
42 Km N of L'Aquila (69753 inhabitants)
53 Km SE of Foligno (57155 inhabitants)
53 Km E of Terni (111501 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
83 Km W of Pescara (121014 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
85 Km W of Chieti (51815 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km NE of Tivoli (56533 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 1.1 2019-12-12
23:46:50		 42.7153 13.2608 11 2019-12-13
00:01:15		 Sala Sismica INGV-Roma 74583321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-12 23:46:50 ± 0.05
Latitude 42.7153 ± 0.0036
Longitude 13.2608 ± 0.0049
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 74583321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 450
Semi-minor axis of confidence ellipse (meter) 290
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 235
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.37861
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 74583321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-13 00:01:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPAG.EHZ. 2019-12-12T23:47:25.68 3.0 undecidable manual S -0.45 0
IV.LNSS.HHZ. 2019-12-12T23:46:59.20 0.3 undecidable manual S 235 21.867 50 0 75
IV.CSP1.EHZ. 2019-12-12T23:46:58.79 0.6 positive manual P 354 42.0246 50 0 48
IV.MF5.EHZ. 2019-12-12T23:46:57.98 1.0 undecidable manual P 28 34.2435 50 0.37 23
IV.NRCA.HHZ. 2019-12-12T23:46:57.97 0.3 undecidable manual S 318 17.7711 50 -0.12 74
IV.SMA1.EHZ. 2019-12-12T23:46:56.33 0.3 undecidable manual S 147 11.1777 135 -0.03 76
IV.TERO.HHZ. 2019-12-12T23:46:56.66 0.3 undecidable manual P 110 29.8479 50 -0.26 70
IV.NRCA.HHZ. 2019-12-12T23:46:55.08 0.1 negative manual P 318 17.7711 50 0.03 100
IV.MC2.EHZ. 2019-12-12T23:46:55.94 1.0 positive manual P 345 22.5552 50 0.15 24
IV.LNSS.HHZ. 2019-12-12T23:46:55.72 1.0 negative manual P 235 21.867 50 0.03 25
IV.RM33.EHZ. 2019-12-12T23:46:55.86 0.6 positive manual P 189 23.1546 50 -0.04 49
IV.SMA1.EHZ. 2019-12-12T23:46:54.20 0.1 undecidable manual P 147 11.1777 135 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.9 0.00009595113499999999 0.1408 AML other m 2019-12-12T23:46:56.79
IV.SMA1.EHN. ML:1.1 0.00014976840000000002 0.1536 AML other m 2019-12-12T23:46:56.54
IV.NRCA.HNE. ML:1.7 0.00039434815 0.1536 AML other m 2019-12-12T23:46:58.19
IV.NRCA.HNN. ML:1.4 0.00019736195 0.0896 AML other m 2019-12-12T23:46:58.06
IV.NRCA.HHE. ML:1.7 0.00042262939999999997 0.1536 AML other m 2019-12-12T23:46:58.19
IV.NRCA.HHN. ML:1.5 0.000229407 0.128 AML other m 2019-12-12T23:46:58.05
IV.LNSS.HHE. ML:0.8 0.000039634509999999995 0.1024 AML other m 2019-12-12T23:46:59.78
IV.LNSS.HHN. ML:1.1 0.00008264351000000001 0.1536 AML other m 2019-12-12T23:46:59.63
IV.RM33.HNE. ML:1.4 0.000149514175 0.6272 AML other m 2019-12-12T23:47:02.18
IV.RM33.HNN. ML:1.4 0.00015247254499999998 0.64 AML other m 2019-12-12T23:47:00.01
IV.RM33.EHE. ML:0.7 0.000029570235 0.1664 AML other m 2019-12-12T23:47:00.33
IV.RM33.EHN. ML:0.7 0.000030703355 0.32 AML other m 2019-12-12T23:46:59.48
IV.TERO.HHE. ML:0.6 0.00002202164 0.0768 AML other m 2019-12-12T23:47:01.61
IV.TERO.HHN. ML:0.9 0.000035335655 0.0768 AML other m 2019-12-12T23:47:01.70
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