ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 0.9 on date 25-12-2018 and time 01:24:57 (UTC) in region 4 km NE Tolmezzo (UD)

A magnitude ML 0.9 earthquake occured in region: 4 km NE Tolmezzo (UD), on

  • 25-12-2018 01:24:57 (UTC)
  • 25-12-2018 02:24:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.42, 13.06 at 9 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
Tolmezzo UD 4 10440 10440
Zuglio UD 5 595 11035
Verzegnis UD 6 863 11898
Arta Terme UD 6 2171 14069
Amaro UD 6 823 14892
Cavazzo Carnico UD 6 1052 15944
Lauco UD 9 729 16673
Villa Santina UD 10 2233 18906
Moggio Udinese UD 11 1714 20620
Sutrio UD 11 1332 21952
Venzone UD 12 2117 24069
Paluzza UD 12 2217 26286
Treppo Carnico UD 12 618 26904
Cercivento UD 13 679 27583
Bordano UD 13 754 28337
Paularo UD 13 2623 30960
Ligosullo UD 13 116 31076
Resiutta UD 13 309 31385
Enemonzo UD 14 1319 32704
Raveo UD 14 458 33162
Preone UD 15 246 33408
Ravascletto UD 15 536 33944
Trasaghis UD 16 2227 36171
Ovaro UD 16 1922 38093
Comeglians UD 18 516 38609
Gemona del Friuli UD 18 10964 49573
Socchieve UD 18 908 50481
Osoppo UD 19 2936 53417
Chiusaforte UD 20 672 54089
Resia UD 20 1033 55122

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km NW of Udine (99169 inhabitants)
60 Km NE of Pordenone (51229 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 Md 1.3
ML 0.9
2018-12-25
01:24:57
46.42 13.06 9 2018-12-25
01:47:54
Sala Sismica INGV-Roma 64198381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-25 01:24:57 ± 0.07
Latitude 46.42 ± 0.01
Longitude 13.06 ± 0.00
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 64198381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 610
Semi-minor axis of confidence ellipse (meter) 265
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 181
Circular confidence region, given by single value of horizontal uncertainty (meter) 610
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 221
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.05
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.33815
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 64198381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-25 01:47:54

Md:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 4
Type of magnitude Md
Reference to an origin 64198381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-25 01:47:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSY.HHZ. 2018-12-25T01:25:43.38 3.0 undecidable manual Sg 3.13 0
IV.HLNI.HHZ. 2018-12-25T01:25:37.12 3.0 undecidable manual Sg 1.77 0
IV.GALF.HHZ. 2018-12-25T01:25:32.61 3.0 undecidable manual Sg 6.21 0
IV.EMSG.HHZ. 2018-12-25T01:25:28.17 3.0 undecidable manual Sg 4.23 0
IV.EPZF.HHZ. 2018-12-25T01:25:27.67 3.0 undecidable manual Sg 3.91 0
IV.EMCN.HNZ. 2018-12-25T01:25:25.22 3.0 undecidable manual Sg 0.42 0
IV.ESLN.HHZ. 2018-12-25T01:25:21.33 3.0 undecidable manual Sn -5.74 0
IV.MOCL.EHZ. 2018-12-25T01:25:15.99 3.0 undecidable manual Sn -2.84 0
OX.ACOM.HHZ. 2018-12-25T01:25:10.51 0.3 undecidable manual S 68 0.3381 50 -0.05 72
OX.MPRI.HHZ. 2018-12-25T01:25:05.43 0.3 undecidable manual S 194 0.1889 112 0.01 75
OX.ACOM.HHZ. 2018-12-25T01:25:05.11 0.1 undecidable manual P 68 0.3381 50 0.06 96
NI.PALA.HHZ. 2018-12-25T01:25:05.88 0.3 undecidable manual S 207 0.2005 111 0.04 74
RF.GEPF.HHZ. 2018-12-25T01:25:04.36 0.3 undecidable manual S 159 0.1592 116 -0.01 75
NI.PALA.HHZ. 2018-12-25T01:25:02.26 0.1 undecidable manual P 207 0.2005 111 -0.07 98
OX.MPRI.HHZ. 2018-12-25T01:25:02.09 0.1 undecidable manual P 194 0.1889 112 0 100
RF.GEPF.HHZ. 2018-12-25T01:25:01.50 0.1 undecidable manual P 159 0.1592 116 0.01 100
IV.CAVE.HHZ. 2018-12-25T01:24:53.67 3.0 negative manual Pg 5.67 0
IV.EMSG.HHZ. 2018-12-25T01:24:41.27 3.0 positive manual Pg 0.22 0
MN.CLTB.HHZ. 2018-12-25T01:24:40.53 3.0 positive manual Pn -5.67 0
IV.RM33.EHZ. 2018-12-25T01:24:06.98 3.0 undecidable manual Pg -2.31 0
IV.GAVE.EHZ. 2018-12-25T01:24:06.31 3.0 undecidable manual Pn -7.08 0
IV.MCRV.HHZ. 2018-12-25T01:23:54.41 3.0 undecidable manual P -7.45 0
IV.LRP.EHZ. 2018-12-25T01:23:51.90 3.0 positive manual P -8.54 0
IV.MOCO.HHZ. 2018-12-25T01:23:48.35 3.0 undecidable manual P -7.75 0
IV.PTRJ.HNZ. 2018-12-25T01:23:44.23 3.0 undecidable manual P -8.56 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:3.5 0.000154 0.9 AML other m 2018-12-25T01:24:26.07
IV.GAVE.EHN. ML:3.5 0.00015405 0.66 AML other m 2018-12-25T01:24:27.55
IV.CAVE.HHE. ML:3.4 0.000602 0.08 AML other m 2018-12-25T01:24:55.84
RF.GEPF.HHN. ML:0.6 3.51E-5 1.32 AML other m 2018-12-25T01:25:05.04
NI.PALA.HHN. ML:1.2 0.0001053 0.56 AML other m 2018-12-25T01:25:06.99
RF.GEPF.HHE. ML:0.5 2.865E-5 1.12 AML other m 2018-12-25T01:25:07.26
NI.PALA.HHE. ML:1.2 9.57E-5 0.72 AML other m 2018-12-25T01:25:08.51
IV.CAVE.HHN. ML:3.4 0.000548 0.44 AML other m 2018-12-25T01:25:08.76
IV.ESLN.HHE. ML:0 0.00666 0.34 AML other m 2018-12-25T01:25:44.55
IV.ESLN.HHN. ML:0 0.004715 0.74 AML other m 2018-12-25T01:25:44.73
IV.EMCN.HNN. ML:0 0.00712 0.1 AML other m 2018-12-25T01:25:46.11
IV.SSY.HHE. ML:0 0.0003795 1.12 AML other m 2018-12-25T01:25:46.30
IV.EMCN.HNE. ML:0 0.006475 0.16 AML other m 2018-12-25T01:25:48.33
IV.GALF.HHN. ML:0 0.0003395 1.36 AML other m 2018-12-25T01:25:49.25
IV.EMSG.HHE. ML:0 0.001485 0.5 AML other m 2018-12-25T01:25:51.70
IV.EMSG.HHN. ML:0 0.00167 0.34 AML other m 2018-12-25T01:25:57.61
IV.EPZF.HHE. ML:0 0.0006265 0.4 AML other m 2018-12-25T01:25:57.82
IV.EPZF.HHN. ML:0 0.0006495 1 AML other m 2018-12-25T01:26:00.46
IV.GALF.HHE. ML:0 0.0004515 1.12 AML other m 2018-12-25T01:26:04.21
IV.SSY.HHN. ML:0 0.0006275 0.42 AML other m 2018-12-25T01:26:07.32
OX.MPRI.HHZ. Md:1.1 8 END duration s
RF.GEPF.HHZ. Md:1.2 9 END duration s
NI.PALA.HHZ. Md:1.3 10 END duration s
OX.ACOM.HHZ. Md:1.6 14 END duration s
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
Waveforms Seismic signals in full SEED format Download