INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.7 on date 12-05-2018 and time 08:36:28 (Italy) in region 8 km W Montegallo (AP)

A magnitude ML 1.7 earthquake occured in region: 8 km W Montegallo (AP), on

  • 12-05-2018 06:36:28 (UTC)
  • 12-05-2018 08:36:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.84, 13.24 at 14 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
Montegallo AP 8 523 523
Arquata del Tronto AP 9 1178 1701
Castelsantangelo sul Nera MC 9 281 1982
Montemonaco AP 10 604 2586
Norcia PG 13 4957 7543
Montefortino FM 14 1178 8721
Ussita MC 14 444 9165
Acquasanta Terme AP 16 2916 12081
Visso MC 16 1107 13188
Accumoli RI 16 667 13855
Preci PG 17 724 14579
Bolognola MC 17 142 14721
Amandola FM 18 3629 18350
Palmiano AP 19 196 18546
Roccafluvione AP 19 2010 20556
Comunanza AP 19 3166 23722

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
46 Km E of Foligno (57155 inhabitants)
56 Km N of L'Aquila (69753 inhabitants)
58 Km NE of Terni (111501 inhabitants)
75 Km E of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
89 Km S of Ancona (100861 inhabitants)
90 Km W of Pescara (121014 inhabitants)
93 Km NW of Chieti (51815 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 1.7 2018-05-12
06:36:28
42.84 13.24 14 2018-05-12
06:45:27
Sala Sismica INGV-Roma 56783281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-12 06:36:28 ± 0.09
Latitude 42.84 ± 0.00
Longitude 13.24 ± 0.00
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 56783281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 377
Semi-minor axis of confidence ellipse (meter) 139
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 251
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.27969
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 56783281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-12 06:45:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LNSS.HHE. 2018-05-12T06:36:39.22 0.6 undecidable manual S 212 0.2797 99 0.26 46
IV.FDMO.HHZ. 2018-05-12T06:36:37.20 0.3 undecidable manual S 330 0.2248 104 -0.16 73
IV.SMA1.EHZ. 2018-05-12T06:36:37.20 0.3 undecidable manual S 162 0.2221 104 -0.07 72
IV.FEMA.HNE. 2018-05-12T06:36:36.24 0.6 undecidable manual S 311 0.1844 109 0.03 49
IV.T1299.EHE. 2018-05-12T06:36:36.96 0.3 undecidable manual S 172 0.2095 105 0.06 74
IV.TERO.HHZ. 2018-05-12T06:36:35.63 3.0 undecidable manual P -0.08 0
IV.RM33.EHZ. 2018-05-12T06:36:35.24 3.0 positive manual P 0 0
IV.T1221.EHZ. 2018-05-12T06:36:34.54 3.0 negative manual P 0.14 0
IV.CSP1.EHZ. 2018-05-12T06:36:34.03 3.0 positive manual P -0.02 0
IV.LNSS.HHE. 2018-05-12T06:36:34.44 0.6 undecidable manual P 212 0.2797 99 0.06 48
IV.MTRA.EHZ. 2018-05-12T06:36:34.80 0.3 undecidable manual S 126 0.1421 118 -0.25 70
IV.NRCA.HHZ. 2018-05-12T06:36:33.50 0.3 undecidable manual S 265 0.0926 135 -0.38 70
IV.MC2.EHZ. 2018-05-12T06:36:33.80 0.3 undecidable manual S 332 0.08 140 0.19 73
IV.T1299.EHE. 2018-05-12T06:36:33.25 0.6 undecidable manual P 172 0.2095 105 0.05 49
IV.FDMO.HHZ. 2018-05-12T06:36:33.39 0.1 undecidable manual P 330 0.2248 104 -0.07 98
IV.MMO1.EHZ. 2018-05-12T06:36:33.70 0.3 undecidable manual S 47 0.0854 137 -0.03 75
IV.SMA1.EHZ. 2018-05-12T06:36:33.40 0.1 undecidable manual P 162 0.2221 104 -0.01 98
IV.MF5.EHZ. 2018-05-12T06:36:33.92 3.0 undecidable manual P 0.32 0
IV.FEMA.HNE. 2018-05-12T06:36:32.67 0.3 undecidable manual P 311 0.1844 109 -0.13 73
IV.MTRA.EHZ. 2018-05-12T06:36:32.18 0.1 undecidable manual P 126 0.1421 118 0.05 99
IV.NRCA.HHZ. 2018-05-12T06:36:31.40 0.1 undecidable manual P 265 0.0926 135 -0.05 100
IV.MC2.EHZ. 2018-05-12T06:36:31.51 0.1 undecidable manual P 332 0.08 140 0.22 96
IV.MMO1.EHZ. 2018-05-12T06:36:31.51 0.1 undecidable manual P 47 0.0854 137 0.15 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.9 0.0008035 0.12 AML other m 2018-05-12T06:36:33.76
IV.NRCA.HNE. ML:1.9 0.0007675 0.12 AML other m 2018-05-12T06:36:33.71
IV.NRCA.HHN. ML:1.7 0.0005965 1.26 AML other m 2018-05-12T06:36:33.82
IV.NRCA.HNN. ML:1.7 0.000527 0.16 AML other m 2018-05-12T06:36:33.75
IV.RM33.EHN. ML:0.7 2.215E-5 0.5 AML other m 2018-05-12T06:36:41.27
IV.RM33.EHE. ML:0.8 2.35E-5 0.72 AML other m 2018-05-12T06:36:42.25
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