INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.6 on date 09-12-2018 and time 08:39:48 (Italy) in region 4 km NE Acquasanta Terme (AP)

A magnitude ML 1.6 earthquake occured in region: 4 km NE Acquasanta Terme (AP), on

  • 09-12-2018 07:39:48 (UTC)
  • 09-12-2018 08:39:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.79, 13.44 at 22 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
Acquasanta Terme AP 4 2916 2916
Valle Castellana TE 8 977 3893
Roccafluvione AP 8 2010 5903
Montegallo AP 11 523 6426
Venarotta AP 11 2066 8492
Palmiano AP 12 196 8688
Arquata del Tronto AP 12 1178 9866
Ascoli Piceno AP 13 49407 59273
Rocca Santa Maria TE 14 537 59810
Montemonaco AP 15 604 60414
Folignano AP 16 9241 69655
Civitella del Tronto TE 18 5116 74771
Comunanza AP 19 3166 77937
Montefortino FM 19 1178 79115
Accumoli RI 19 667 79782
Force AP 20 1354 81136
Cortino TE 20 656 81792

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of Teramo (54892 inhabitants)
49 Km N of L'Aquila (69753 inhabitants)
63 Km E of Foligno (57155 inhabitants)
66 Km W of Montesilvano (53738 inhabitants)
70 Km E of Terni (111501 inhabitants)
73 Km NW of Pescara (121014 inhabitants)
77 Km NW of Chieti (51815 inhabitants)
92 Km S of Ancona (100861 inhabitants)
93 Km E of Perugia (166134 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 1.6 2018-12-09
07:39:48
42.79 13.44 22 2018-12-09
07:55:02
Sala Sismica INGV-Roma 63782381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-09 07:39:48 ± 0.19
Latitude 42.79 ± 0.00
Longitude 13.44 ± 0.01
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 63782381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 790
Semi-minor axis of confidence ellipse (meter) 191
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
Circular confidence region, given by single value of horizontal uncertainty (meter) 790
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.41549
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 63782381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-09 07:55:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EUCT.HNZ. 2018-12-09T07:41:25.85 3.0 undecidable manual Sn 0.7 0
AC.SRN.HHZ. 2018-12-09T07:41:24.37 3.0 undecidable manual Pg 12.58 0
IV.CAR1.HHZ. 2018-12-09T07:41:21.21 3.0 undecidable manual Sn -9.99 0
IV.MSSA.HHZ. 2018-12-09T07:41:16.52 3.0 undecidable manual Sg 9.52 0
IV.MAGA.HHZ. 2018-12-09T07:41:11.68 3.0 undecidable manual Sn -7.71 0
IV.CORL.HHZ. 2018-12-09T07:41:06.65 3.0 undecidable manual Pg 10.98 0
GU.GRAM.HHZ. 2018-12-09T07:40:58.56 3.0 undecidable manual Sn -3.05 0
IV.MCRV.HHZ. 2018-12-09T07:40:55.49 3.0 undecidable manual Sg 1.77 0
IV.CAFE.HHZ. 2018-12-09T07:40:51.24 3.0 undecidable manual Sg 1.13 0
IV.PAOL.HHZ. 2018-12-09T07:40:45.03 3.0 undecidable manual Sg 2.83 0
IV.ZONE.HHZ. 2018-12-09T07:40:45.90 3.0 undecidable manual Pg 4.88 0
CR.STON.BHZ. 2018-12-09T07:40:37.22 3.0 positive manual Pn -0.03 0
IV.MSSA.HHZ. 2018-12-09T07:40:33.03 3.0 undecidable manual Pn 1.49 0
GU.GSCL.HHZ. 2018-12-09T07:40:26.81 3.0 undecidable manual Pg 3.45 0
IT.PLTA.HNZ. 2018-12-09T07:40:20.41 3.0 undecidable manual Sn -9.99 0
IV.MMUR.HNZ. 2018-12-09T07:40:12.75 3.0 undecidable manual Sn 0.82 0
TV.SF04.EHZ. 2018-12-09T07:40:03.00 3.0 positive manual Pg -1.06 0
IV.GIGS.HHN. 2018-12-09T07:40:02.05 0.1 undecidable manual S 164 0.3516 112 -0.14 96
IV.LNSS.HHZ. 2018-12-09T07:40:02.40 0.1 undecidable manual S 238 0.3516 112 0.22 94
IV.RM33.HNZ. 2018-12-09T07:40:01.66 0.1 undecidable manual S 211 0.3292 114 0.09 97
IV.CAMP.HHZ. 2018-12-09T07:39:59.70 0.1 undecidable manual S 186 0.2572 121 0.02 98
IV.NRCA.HHZ. 2018-12-09T07:39:59.40 0.1 undecidable manual S 280 0.2455 122 0.04 98
IV.MMUR.HNZ. 2018-12-09T07:39:58.64 3.0 undecidable manual P -1.96 0
IV.MF5.EHZ. 2018-12-09T07:39:58.71 0.1 undecidable manual S 3 0.1961 129 0.53 90
IV.TERO.HHZ. 2018-12-09T07:39:58.36 0.1 undecidable manual S 145 0.2059 128 -0.06 100
IV.SMA1.EHZ. 2018-12-09T07:39:57.62 0.1 undecidable manual S 206 0.1799 132 -0.21 96
IV.SAMA.HHZ. 2018-12-09T07:39:57.23 3.0 negative manual P -6.04 0
IV.GAVE.HNZ. 2018-12-09T07:39:57.59 0.3 undecidable manual P 256 0.4155 108 0.07 72
IV.LNSS.HHZ. 2018-12-09T07:39:56.50 0.3 undecidable manual P 238 0.3516 112 0.01 73
IV.MMO1.HNE. 2018-12-09T07:39:56.54 0.1 undecidable manual S 321 0.1376 141 -0.41 92
IV.RM33.HNZ. 2018-12-09T07:39:56.05 0.3 undecidable manual P 211 0.3292 114 -0.09 72
IV.MNTP.HNE. 2018-12-09T07:39:55.76 0.3 undecidable manual P 3 0.3453 112 -0.63 62
IV.CAMP.HHZ. 2018-12-09T07:39:55.19 0.1 undecidable manual P 186 0.2572 121 0.15 96
IV.GIGS.HHN. 2018-12-09T07:39:55.90 0.3 undecidable manual P 164 0.3516 112 -0.59 64
IV.NRCA.HHZ. 2018-12-09T07:39:54.88 0.1 undecidable manual P 280 0.2455 122 0.02 99
IV.SMA1.EHZ. 2018-12-09T07:39:54.14 0.1 undecidable manual P 206 0.1799 132 0.17 98
IV.T1299.HNZ. 2018-12-09T07:39:54.49 0.1 undecidable manual P 217 0.1979 129 0.29 95
IV.MF5.EHZ. 2018-12-09T07:39:54.50 0.1 undecidable manual P 3 0.1961 129 0.32 94
IV.TERO.HHZ. 2018-12-09T07:39:54.75 0.3 undecidable manual P 145 0.2059 128 0.44 68
IV.MMO1.HNE. 2018-12-09T07:39:53.36 0.3 undecidable manual P 321 0.1376 141 -0.11 74
IV.MTRA.HNE. 2018-12-09T07:39:52.29 0.3 undecidable manual P 224 0.0495 164 -0.48 70
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.3 0.00010065 1.74 AML other m 2018-12-09T07:39:57.04
IV.SMA1.EHE. ML:1.3 0.0001044 1.54 AML other m 2018-12-09T07:39:58.09
IV.NRCA.HHE. ML:1.4 0.00010405 0.1 AML other m 2018-12-09T07:39:59.52
IV.NRCA.HHN. ML:1.6 0.000168 0.1 AML other m 2018-12-09T07:39:59.57
IV.EL6.EHE. ML:2.2 0.000279 0.64 AML other m 2018-12-09T07:40:23.59
IV.EL6.EHN. ML:2.2 0.0002515 0.56 AML other m 2018-12-09T07:40:26.63
IV.MMUR.HNN. ML:3.1 0.00153 1.24 AML other m 2018-12-09T07:40:31.05
IV.MMUR.HNE. ML:3.1 0.0017795 0.48 AML other m 2018-12-09T07:40:34.73
IV.ZONE.HHE. ML:2.9 4.245E-5 1.24 AML other m 2018-12-09T07:40:50.96
IV.EUCT.HNN. ML:4.2 0.0006585 1.06 AML other m 2018-12-09T07:41:32.70
IV.ZONE.HHN. ML:2.9 3.805E-5 0.44 AML other m 2018-12-09T07:41:38.91
IV.EUCT.HNE. ML:4.2 0.0006475 0.42 AML other m 2018-12-09T07:41:39.20
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