INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.5 on date 09-12-2018 and time 11:26:55 (Italy) in region 6 km S Monte Cavallo (MC)

A magnitude ML 1.5 earthquake occured in region: 6 km S Monte Cavallo (MC), on

  • 09-12-2018 10:26:55 (UTC)
  • 09-12-2018 11:26:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.94, 12.99 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Monte Cavallo MC 6 145 145
Preci PG 8 724 869
Sellano PG 8 1079 1948
Visso MC 8 1107 3055
Ussita MC 12 444 3499
Pieve Torina MC 13 1458 4957
Fiordimonte MC 14 202 5159
Castelsantangelo sul Nera MC 14 281 5440
Cerreto di Spoleto PG 15 1075 6515
Serravalle di Chienti MC 15 1070 7585
Pievebovigliana MC 16 866 8451
Muccia MC 17 915 9366
Fiastra MC 17 559 9925
Acquacanina MC 18 121 10046
Norcia PG 18 4957 15003

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km E of Foligno (57155 inhabitants)
51 Km NE of Terni (111501 inhabitants)
53 Km E of Perugia (166134 inhabitants)
66 Km W of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
93 Km NE of Viterbo (67173 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 1.5 2018-12-09
10:26:55
42.94 12.99 11 2018-12-09
10:33:09
Sala Sismica INGV-Roma 63783851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-09 10:26:55 ± 0.08
Latitude 42.94 ± 0.01
Longitude 12.99 ± 0.01
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 63783851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 790
Semi-minor axis of confidence ellipse (meter) 350
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 225
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) 88
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.3966
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 63783851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-09 10:33:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2018-12-09T10:27:15.71 3.0 undecidable manual S -0.06 0
IV.TERO.HHZ. 2018-12-09T10:27:14.78 3.0 undecidable manual S -0.12 0
IV.RM33.EHZ. 2018-12-09T10:27:11.96 3.0 undecidable manual S -0.09 0
IV.ATCC.EHZ. 2018-12-09T10:27:08.58 0.3 undecidable manual S 314 0.357 90 0.26 68
IV.ASSB.HHZ. 2018-12-09T10:27:05.49 0.1 undecidable manual S 293 0.2662 90 -0.14 95
IV.ATCC.EHZ. 2018-12-09T10:27:02.86 0.1 undecidable manual P 314 0.357 90 0.05 95
IV.ARRO.EHN. 2018-12-09T10:27:02.91 0.6 undecidable manual P 205 0.3966 90 -0.58 43
IV.MC2.EHZ. 2018-12-09T10:27:02.20 0.1 undecidable manual S 101 0.1448 90 0.15 97
IV.ASSB.HHZ. 2018-12-09T10:27:01.30 0.1 undecidable manual P 293 0.2662 90 0.04 96
IV.NRCA.HHZ. 2018-12-09T10:27:01.46 0.1 undecidable manual S 140 0.1376 90 -0.35 94
IV.GAVE.EHE. 2018-12-09T10:27:00.78 0.3 undecidable manual P 197 0.2572 90 -0.33 69
IV.FDMO.HHZ. 2018-12-09T10:27:00.99 0.1 undecidable manual S 35 0.1187 97 -0.27 93
IV.FEMA.HNN. 2018-12-09T10:26:59.69 0.1 undecidable manual S 61 0.0468 147 0.16 99
IT.MTCL.HGZ. 2018-12-09T10:26:59.58 0.1 undecidable manual S 4 0.0549 141 -0.1 99
IV.MC2.EHZ. 2018-12-09T10:26:59.22 0.1 undecidable manual P 101 0.1448 90 0.03 99
IV.FDMO.HHZ. 2018-12-09T10:26:58.79 0.1 positive manual P 35 0.1187 97 0.05 100
IV.FEMA.HNN. 2018-12-09T10:26:58.26 0.1 undecidable manual P 61 0.0468 147 0.52 91
IV.NRCA.HHZ. 2018-12-09T10:26:58.98 0.1 negative manual P 140 0.1376 90 -0.07 99
IT.MTCL.HGZ. 2018-12-09T10:26:57.94 0.1 undecidable manual P 4 0.0549 141 0.12 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.7 0.000494 0.12 AML other m 2018-12-09T10:27:01.66
IV.FDMO.HHE. ML:1.4 0.0002305 1.2 AML other m 2018-12-09T10:27:01.32
IV.NRCA.HHE. ML:1.5 0.0002845 1.36 AML other m 2018-12-09T10:27:02.10
IV.NRCA.HNE. ML:1.5 0.00031660845 0.3776 AML other m 2018-12-09T10:27:02.05
IV.NRCA.HNN. ML:1.7 0.00047707565 0.1536 AML other m 2018-12-09T10:27:01.66
IV.RM33.EHE. ML:1.1 3.116687E-5 1.3824 AML other m 2018-12-09T10:27:12.97
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