Earthquake with magnitude of ML 1.0 on date 10-01-2021 and time 02:36:09 (UTC) in region 3 km NW Acquasanta Terme (AP)

A magnitude ML 1.0 earthquake occured in region: 3 km NW Acquasanta Terme (AP), on

  • 10-01-2021 02:36:09 (UTC)
  • 10-01-2021 03:36:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.79, 13.39 at 20 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
Acquasanta Terme AP 3 2916 2916
Montegallo AP 7 523 3439
Arquata del Tronto AP 8 1178 4617
Roccafluvione AP 11 2010 6627
Valle Castellana TE 11 977 7604
Montemonaco AP 13 604 8208
Venarotta AP 13 2066 10274
Palmiano AP 13 196 10470
Accumoli RI 16 667 11137
Rocca Santa Maria TE 16 537 11674
Ascoli Piceno AP 17 49407 61081
Montefortino FM 17 1178 62259
Comunanza AP 19 3166 65425
Amatrice RI 20 2657 68082

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of Teramo (54892 inhabitants)
49 Km N of L'Aquila (69753 inhabitants)
59 Km E of Foligno (57155 inhabitants)
66 Km E of Terni (111501 inhabitants)
70 Km W of Montesilvano (53738 inhabitants)
77 Km W of Pescara (121014 inhabitants)
80 Km NW of Chieti (51815 inhabitants)
89 Km E of Perugia (166134 inhabitants)
93 Km S of Ancona (100861 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 1.0 2021-01-10
02:36:09
42.79 13.39 20 2021-01-10
02:42:17
Sala Sismica INGV-Roma 86133151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-10 02:36:09 ± 0.13
Latitude 42.79 ± 0.00
Longitude 13.39 ± 0.01
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86133151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 615
Semi-minor axis of confidence ellipse (meter) 115
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
Circular confidence region, given by single value of horizontal uncertainty (meter) 620
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 122
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.03507
Epicentral distance of station farthest from the epicenter (degree) 0.23113
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 86133151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-10 02:42:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2021-01-10T02:36:19.18 0.3 undecidable manual S 282 0.2059 123 0.14 71
IV.TERO.HHZ. 2021-01-10T02:36:19.65 0.3 undecidable manual S 137 0.2311 120 -0.03 72
IV.MF5.EHE. 2021-01-10T02:36:19.41 0.3 undecidable manual S 15 0.2023 124 0.44 67
IV.SMA1.EHE. 2021-01-10T02:36:18.28 0.3 undecidable manual S 194 0.1655 131 0.19 71
IV.MMO1.EHZ. 2021-01-10T02:36:16.94 0.3 undecidable manual S 337 0.1169 142 -0.15 72
IV.MTRA.EHZ. 2021-01-10T02:36:16.01 0.1 undecidable manual S 171 0.0351 167 -0.03 100
IV.TERO.HHZ. 2021-01-10T02:36:15.32 1.0 negative manual P 137 0.2311 120 -0.14 24
IV.MF5.EHE. 2021-01-10T02:36:14.94 0.3 undecidable manual P 15 0.2023 124 -0.11 71
IV.SMA1.EHE. 2021-01-10T02:36:14.50 0.1 undecidable manual P 194 0.1655 131 -0.04 97
IV.NRCA.HHZ. 2021-01-10T02:36:14.98 0.3 undecidable manual P 282 0.2059 123 -0.11 71
IV.T1299.HNZ. 2021-01-10T02:36:14.79 0.1 undecidable manual P 206 0.1754 129 0.12 95
IV.MTRA.EHZ. 2021-01-10T02:36:13.26 0.1 positive manual P 171 0.0351 167 -0.1 99
IV.MMO1.EHZ. 2021-01-10T02:36:13.74 0.3 undecidable manual P 337 0.1169 142 -0.22 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:0.9 6.125E-5 0.78 AML other m 2021-01-10T02:36:16.54
IV.MTRA.EHN. ML:0.9 7.015E-5 0.16 AML other m 2021-01-10T02:36:16.23
IV.NRCA.HHN. ML:1.1 6.685E-5 0.16 AML other m 2021-01-10T02:36:19.37
IV.NRCA.HHE. ML:1 4.385E-5 0.52 AML other m 2021-01-10T02:36:20.68
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