Earthquake with magnitude of ML 1.8 on date 27-10-2020 and time 08:56:10 (Italy) in region 4 km SW Valle Castellana (TE)

A magnitude ML 1.8 earthquake occured in region: 4 km SW Valle Castellana (TE), on

  • 27-10-2020 07:56:10 (UTC)
  • 27-10-2020 08:56:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.71, 13.47 at 16 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
Valle Castellana TE 4 977 977
Rocca Santa Maria TE 5 537 1514
Acquasanta Terme AP 9 2916 4430
Cortino TE 10 656 5086
Torricella Sicura TE 16 2641 7727
Arquata del Tronto AP 16 1178 8905
Roccafluvione AP 17 2010 10915
Amatrice RI 17 2657 13572
Civitella del Tronto TE 17 5116 18688
Campli TE 18 7209 25897
Crognaleto TE 18 1297 27194
Fano Adriano TE 18 296 27490
Folignano AP 18 9241 36731
Accumoli RI 18 667 37398
Campotosto AQ 19 542 37940
Ascoli Piceno AP 19 49407 87347
Montorio al Vomano TE 19 8218 95565
Montegallo AP 19 523 96088
Venarotta AP 20 2066 98154
Teramo TE 20 54892 153046

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km W of Teramo (54892 inhabitants)
40 Km N of L'Aquila (69753 inhabitants)
59 Km W of Montesilvano (53738 inhabitants)
66 Km W of Pescara (121014 inhabitants)
69 Km E of Foligno (57155 inhabitants)
69 Km NW of Chieti (51815 inhabitants)
69 Km E of Terni (111501 inhabitants)
99 Km E of Perugia (166134 inhabitants)
99 Km NE of Tivoli (56533 inhabitants)
100 Km NE of Guidonia Montecelio (88673 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
Reviewed
Rev100
ML 1.8 2020-10-27
07:56:10
42.71 13.47 16 2020-10-27
08:03:40
Sala Sismica INGV-Roma 84174001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-27 07:56:10 ± 0.09
Latitude 42.71 ± 0.00
Longitude 13.47 ± 0.01
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84174001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 164
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 530
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.43437
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 84174001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-27 08:03:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2020-10-27T07:57:50.80 3.0 undecidable manual Pg 17.190001 0
IV.VENL.HNZ. 2020-10-27T07:57:36.53 3.0 undecidable manual Sg 11.13 0
MN.BNI.HHZ. 2020-10-27T07:57:30.65 3.0 negative manual Pn 2.75 0
IV.PZUN.HHZ. 2020-10-27T07:57:19.85 3.0 undecidable manual Sn -2.19 0
OX.VARN.HHZ. 2020-10-27T07:57:05.60 3.0 negative manual Pn 5.37 0
TV.SF01.EHZ. 2020-10-27T07:56:50.19 3.0 undecidable manual Sn -0.57 0
IV.CRTO.HHZ. 2020-10-27T07:56:41.69 3.0 positive manual Pn 1.13 0
IV.FDMO.HHZ. 2020-10-27T07:56:25.54 0.3 undecidable manual S 320 0.4344 97 -0.17 68
IV.CSP1.EHZ. 2020-10-27T07:56:25.83 0.3 undecidable manual S 333 0.4326 98 0.18 68
IV.GUMA.HHZ. 2020-10-27T07:56:24.50 0.6 undecidable manual S 344 0.3696 99 0.68 40
IV.NRCA.HHZ. 2020-10-27T07:56:21.41 0.3 undecidable manual S 296 0.2923 103 -0.16 70
IV.MC2.EHZ. 2020-10-27T07:56:21.88 0.6 undecidable manual S 315 0.2923 103 0.32 46
IV.RM33.HNE. 2020-10-27T07:56:21.27 0.6 undecidable manual S 224 0.2743 104 0.22 46
IV.MF5.EHZ. 2020-10-27T07:56:21.77 0.6 undecidable manual S 358 0.2815 104 0.52 44
IV.GIGS.HHE. 2020-10-27T07:56:20.45 0.6 undecidable manual S 164 0.2635 105 -0.3 46
IV.MMO1.HNZ. 2020-10-27T07:56:19.46 0.6 undecidable manual S 331 0.2203 110 -0.06 48
IV.CSP1.EHZ. 2020-10-27T07:56:18.80 1.0 positive manual P 333 0.4326 98 -0.37 22
IV.FDMO.HHZ. 2020-10-27T07:56:18.83 0.1 undecidable manual P 320 0.4344 97 -0.37 87
IV.CAMP.HHE. 2020-10-27T07:56:18.47 0.6 undecidable manual S 196 0.1772 117 0.13 48
IV.T1299.HNN. 2020-10-27T07:56:18.30 0.6 undecidable manual S 243 0.1583 121 0.46 45
IV.GUMA.HHZ. 2020-10-27T07:56:18.14 0.6 negative manual P 344 0.3696 99 0.03 47
IV.SMA1.EHE. 2020-10-27T07:56:17.05 0.6 undecidable manual S 233 0.1268 129 -0.03 49
IV.MF5.EHZ. 2020-10-27T07:56:16.70 0.1 undecidable manual P 358 0.2815 104 0.08 95
IV.NRCA.HHZ. 2020-10-27T07:56:16.56 0.1 negative manual P 296 0.2923 103 -0.25 92
IV.GIGS.HHE. 2020-10-27T07:56:16.17 0.1 undecidable manual P 164 0.2635 105 -0.16 95
IV.MC2.EHZ. 2020-10-27T07:56:16.75 0.1 negative manual P 315 0.2923 103 -0.05 95
IV.RM33.HNE. 2020-10-27T07:56:16.55 0.1 undecidable manual P 224 0.2743 104 0.04 96
IV.TERO.HHZ. 2020-10-27T07:56:16.83 0.3 undecidable manual S 131 0.1277 128 -0.26 71
IV.MMO1.HNZ. 2020-10-27T07:56:15.43 0.1 undecidable manual P 331 0.2203 110 -0.2 94
IV.MTRA.HNZ. 2020-10-27T07:56:15.86 0.6 undecidable manual S 312 0.0755 146 -0.19 48
IV.T1299.HNN. 2020-10-27T07:56:14.77 0.1 undecidable manual P 243 0.1583 121 0.11 97
IV.TERO.HHZ. 2020-10-27T07:56:14.38 0.1 undecidable manual P 131 0.1277 128 0.16 96
IV.SMA1.EHE. 2020-10-27T07:56:14.37 0.1 undecidable manual P 233 0.1268 129 0.15 97
IV.CAMP.HHE. 2020-10-27T07:56:14.99 0.1 undecidable manual P 196 0.1772 117 0.04 97
IV.MTRA.HNZ. 2020-10-27T07:56:13.61 0.1 undecidable manual P 312 0.0755 146 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HHN. ML:1.8 0.000471 0.08 AML other m 2020-10-27T07:56:17.49
IV.TERO.HHE. ML:1.4 0.0002035 0.26 AML other m 2020-10-27T07:56:17.51
IV.NRCA.HHE. ML:1.8 0.0002865 0.14 AML other m 2020-10-27T07:56:21.59
IV.NRCA.HHN. ML:1.8 0.000236 1.58 AML other m 2020-10-27T07:56:21.99
IV.CSP1.EHE. ML:1.9 0.000196 1.26 AML other m 2020-10-27T07:56:26.20
IV.CSP1.EHN. ML:1.9 0.000188 1.46 AML other m 2020-10-27T07:56:30.08
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