INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.9 on date 09-12-2018 and time 20:42:44 (Italy) in region 4 km E Accumoli (RI)

A magnitude ML 0.9 earthquake occured in region: 4 km E Accumoli (RI), on

  • 09-12-2018 19:42:44 (UTC)
  • 09-12-2018 20:42:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7, 13.3 at 13 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.

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 4 667 667
Arquata del Tronto AP 8 1178 1845
Amatrice RI 8 2657 4502
Acquasanta Terme AP 12 2916 7418
Cittareale RI 15 482 7900
Montegallo AP 16 523 8423
Valle Castellana TE 17 977 9400
Campotosto AQ 17 542 9942
Rocca Santa Maria TE 19 537 10479
Norcia PG 19 4957 15436
Cortino TE 20 656 16092

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km W of Teramo (54892 inhabitants)
40 Km N of L'Aquila (69753 inhabitants)
55 Km E of Terni (111501 inhabitants)
56 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
80 Km W of Pescara (121014 inhabitants)
82 Km W of Chieti (51815 inhabitants)
86 Km SE of Perugia (166134 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 0.9 2018-12-09
19:42:44
42.7 13.3 13 2018-12-09
19:52:04
Sala Sismica INGV-Roma 63799261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-09 19:42:44 ± 0.07
Latitude 42.70 ± 0.00
Longitude 13.30 ± 0.00
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 63799261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 348
Semi-minor axis of confidence ellipse (meter) 96
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 300
Circular confidence region, given by single value of horizontal uncertainty (meter) 350
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.07105
Epicentral distance of station farthest from the epicenter (degree) 0.30757
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 63799261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-09 19:52:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2018-12-09T19:42:55.60 0.3 undecidable manual S 268 0.295 96 0.04 73
IV.LNSS.HHZ. 2018-12-09T19:42:53.17 0.3 undecidable manual S 242 0.2131 101 0.01 75
IV.MC2.EHZ. 2018-12-09T19:42:53.56 0.3 undecidable manual S 339 0.2212 100 0.17 73
IV.TERO.HHZ. 2018-12-09T19:42:53.72 0.6 undecidable manual S 110 0.241 99 -0.25 48
IV.CAMP.HHZ. 2018-12-09T19:42:52.24 0.3 undecidable manual S 154 0.188 104 -0.19 73
IV.RM33.EHZ. 2018-12-09T19:42:52.75 0.3 undecidable manual S 197 0.2041 102 -0.15 73
IV.MMO1.HNZ. 2018-12-09T19:42:52.60 0.3 undecidable manual S 7 0.1961 103 -0.07 74
IV.NRCA.HHZ. 2018-12-09T19:42:52.06 0.3 undecidable manual S 314 0.1853 105 -0.29 70
IV.MF5.EHZ. 2018-12-09T19:42:51.53 0.6 undecidable manual P 23 0.3076 96 0.5 44
IV.GAVE.EHZ. 2018-12-09T19:42:50.73 0.1 undecidable manual P 268 0.295 96 -0.09 97
IV.MC2.EHZ. 2018-12-09T19:42:49.49 0.3 undecidable manual P 339 0.2212 100 -0.07 74
IV.MMO1.HNZ. 2018-12-09T19:42:49.15 0.1 undecidable manual P 7 0.1961 103 0 100
IV.TERO.HHZ. 2018-12-09T19:42:49.93 0.3 undecidable manual P 110 0.241 99 0.04 73
IV.T1299.HNZ. 2018-12-09T19:42:49.64 0.3 undecidable manual S 188 0.071 141 0.18 74
IV.RM33.EHZ. 2018-12-09T19:42:49.13 0.6 undecidable manual P 197 0.2041 102 -0.14 49
IV.MTRA.HNZ. 2018-12-09T19:42:49.67 0.3 undecidable manual S 55 0.0908 132 -0.19 74
IV.SMA1.EHZ. 2018-12-09T19:42:49.31 0.6 undecidable manual S 158 0.0791 137 -0.31 48
IV.LNSS.HHZ. 2018-12-09T19:42:49.50 0.1 positive manual P 242 0.2131 101 0.07 98
IV.NRCA.HHZ. 2018-12-09T19:42:48.90 0.3 undecidable manual P 314 0.1853 105 -0.07 74
IV.CAMP.HHZ. 2018-12-09T19:42:48.91 0.1 undecidable manual P 154 0.188 104 -0.1 99
IV.SMA1.EHZ. 2018-12-09T19:42:47.62 0.1 negative manual P 158 0.0791 137 0.23 98
IV.T1299.HNZ. 2018-12-09T19:42:47.60 0.1 undecidable manual P 188 0.071 141 0.31 96
IV.MTRA.HNZ. 2018-12-09T19:42:47.59 0.3 undecidable manual P 55 0.0908 132 0.07 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.3 0.000225 0.42 AML other m 2018-12-09T19:42:49.80
IV.RM33.EHN. ML:0.9 4.7936655E-5 1.3568 AML other m 2018-12-09T19:42:53.04
IV.RM33.EHE. ML:0.8 3.26865515E-5 0.6528 AML other m 2018-12-09T19:42:53.09
IV.LNSS.HNE. ML:1.3 0.00010634605 0.5632 AML other m 2018-12-09T19:42:53.56
IV.TERO.HHN. ML:1 5.543582E-5 0.256 AML other m 2018-12-09T19:42:54.00
IV.TERO.HHE. ML:1.2 7.3159565E-5 0.1664 AML other m 2018-12-09T19:42:53.96
IV.GAVE.EHN. ML:0.9 3.3686535E-5 0.256 AML other m 2018-12-09T19:42:55.93
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download