Earthquake with magnitude of ML 1.6 on date 25-12-2018 and time 02:05:27 (UTC) in region 4 km NW Amatrice (RI)

A magnitude ML 1.6 earthquake occured in region: 4 km NW Amatrice (RI), on

  • 25-12-2018 02:05:27 (UTC)
  • 25-12-2018 03:05:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.65, 13.24 at 7 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
Amatrice RI 4 2657 2657
Accumoli RI 5 667 3324
Cittareale RI 8 482 3806
Montereale AQ 14 2581 6387
Arquata del Tronto AP 15 1178 7565
Campotosto AQ 15 542 8107
Capitignano AQ 15 665 8772
Borbona RI 18 617 9389
Posta RI 18 694 10083
Acquasanta Terme AP 19 2916 12999

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NW of L'Aquila (69753 inhabitants)
38 Km W of Teramo (54892 inhabitants)
50 Km E of Terni (111501 inhabitants)
56 Km SE of Foligno (57155 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
84 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km NE of Tivoli (56533 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
97 Km E 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 1.6 2018-12-25
02:05:27
42.65 13.24 7 2018-12-25
02:18:34
Sala Sismica INGV-Roma 64200541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-25 02:05:27 ± 0.1
Latitude 42.65 ± 0.00
Longitude 13.24 ± 0.00
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 64200541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 400
Semi-minor axis of confidence ellipse (meter) 201
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 321
Circular confidence region, given by single value of horizontal uncertainty (meter) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.37322
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 64200541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-25 02:18:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MN.TUE.HHZ. 2018-12-25T02:06:32.54 3.0 undecidable manual Pn -1.92 0
IV.APEC.HHZ. 2018-12-25T02:06:22.75 3.0 undecidable manual Sn -4.01 0
GU.SARM.EHZ. 2018-12-25T02:06:03.00 3.0 positive manual Pn -1.44 0
IV.MMO1.EHZ. 2018-12-25T02:05:38.03 0.3 undecidable manual S 14 0.2563 104 0.28 71
IV.LRP.EHZ. 2018-12-25T02:05:37.07 3.0 undecidable manual S -1.56 0
IV.TERO.HNZ. 2018-12-25T02:05:37.82 0.3 undecidable manual S 96 0.2662 104 -0.27 71
IV.GAVE.EHZ. 2018-12-25T02:05:37.37 0.3 undecidable manual S 279 0.2608 104 -0.53 67
IV.NRCA.HHZ. 2018-12-25T02:05:35.96 0.3 undecidable manual S 333 0.2068 108 0.05 75
IV.MF5.EHZ. 2018-12-25T02:05:35.92 0.1 undecidable manual P 25 0.3732 50 0.1 96
IV.LNSS.HHZ. 2018-12-25T02:05:34.17 0.3 undecidable manual S 253 0.1574 113 0.06 76
IV.MMO1.EHZ. 2018-12-25T02:05:33.43 0.1 undecidable manual P 14 0.2563 104 -0.01 100
IV.TERO.HNZ. 2018-12-25T02:05:33.43 0.1 undecidable manual P 96 0.2662 104 -0.2 96
IV.RM33.EHZ. 2018-12-25T02:05:33.77 0.3 undecidable manual S 189 0.1421 115 0.18 74
IV.GAVE.EHZ. 2018-12-25T02:05:33.35 0.3 undecidable manual P 279 0.2608 104 -0.17 72
IV.NRCA.HHZ. 2018-12-25T02:05:32.43 0.1 undecidable manual P 333 0.2068 108 0.06 100
IV.RM33.EHZ. 2018-12-25T02:05:31.19 0.1 undecidable manual P 189 0.1421 115 0.16 99
IV.LNSS.HHZ. 2018-12-25T02:05:31.48 0.1 positive manual P 253 0.1574 113 0.15 99
IV.MOCO.HHZ. 2018-12-25T02:05:11.78 3.0 undecidable manual S -0.19 0
IV.PTRJ.HNZ. 2018-12-25T02:05:05.74 3.0 undecidable manual P 0.19 0
IV.MGR.HHZ. 2018-12-25T02:05:04.18 3.0 undecidable manual P -2.31 0
IV.PAOL.HHZ. 2018-12-25T02:04:59.68 3.0 undecidable manual P -1.1 0
IV.MRB1.HNZ. 2018-12-25T02:04:55.27 3.0 undecidable manual P -2.2 0
IV.MCRV.HHZ. 2018-12-25T02:04:49.74 3.0 negative manual P -1.63 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTRJ.HHN. ML:3.9 0.002905 0.26 AML other m 2018-12-25T02:05:10.45
IV.PTRJ.HNN. ML:3.9 0.002805 0.26 AML other m 2018-12-25T02:05:10.45
IV.PTRJ.HHE. ML:3.2 0.000692 0.54 AML other m 2018-12-25T02:05:12.23
IV.PTRJ.HNE. ML:3.5 0.00115 0.4 AML other m 2018-12-25T02:05:17.46
IV.RM33.EHN. ML:1.6 0.0003565 1.76 AML other m 2018-12-25T02:05:33.92
IV.LNSS.HHN. ML:1.4 0.0002 0.14 AML other m 2018-12-25T02:05:34.34
IV.LNSS.HHE. ML:1.4 0.0002095 0.36 AML other m 2018-12-25T02:05:34.28
IV.RM33.EHE. ML:1.6 0.0003485 0.96 AML other m 2018-12-25T02:05:34.07
IV.NRCA.HHN. ML:1.7 0.000346 0.14 AML other m 2018-12-25T02:05:36.04
IV.NRCA.HHE. ML:2 0.000688 0.94 AML other m 2018-12-25T02:05:36.52
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