Earthquake with magnitude of ML 1.3 on date 21-09-2019 and time 22:38:41 (UTC) in region 4 km NW Acquasanta Terme (AP)

A magnitude ML 1.3 earthquake occured in region: 4 km NW Acquasanta Terme (AP), on

  • 21-09-2019 22:38:41 (UTC)
  • 22-09-2019 00:38:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.39 at 19 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 4 2916 2916
Montegallo AP 7 523 3439
Arquata del Tronto AP 8 1178 4617
Roccafluvione AP 10 2010 6627
Valle Castellana TE 11 977 7604
Montemonaco AP 12 604 8208
Venarotta AP 12 2066 10274
Palmiano AP 12 196 10470
Montefortino FM 16 1178 11648
Accumoli RI 16 667 12315
Ascoli Piceno AP 17 49407 61722
Rocca Santa Maria TE 17 537 62259
Comunanza AP 18 3166 65425
Force AP 20 1354 66779

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of Teramo (54892 inhabitants)
50 Km N of L'Aquila (69753 inhabitants)
58 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)
81 Km NW of Chieti (51815 inhabitants)
88 Km E of Perugia (166134 inhabitants)
91 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
Rev 100 ML 1.3 2019-09-21
22:38:41
42.8 13.39 19 2019-09-21
22:43:53
Sala Sismica INGV-Roma 72632521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-21 22:38:41 ± 0.15
Latitude 42.80 ± 0.01
Longitude 13.39 ± 0.01
Depth (km) 19 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 72632521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1183
Semi-minor axis of confidence ellipse (meter) 420
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 256
Circular confidence region, given by single value of horizontal uncertainty (meter) 1180
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.32106
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 72632521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-21 22:43:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2019-09-21T22:39:02.26 3.0 undecidable manual S -0.15 0
IV.MF5.EHZ. 2019-09-21T22:38:50.59 0.3 undecidable manual S 15 0.1934 124 0.12 73
IV.GAVE.EHZ. 2019-09-21T22:38:50.14 3.0 negative manual P 0.02 0
IV.LNSS.HHZ. 2019-09-21T22:38:49.35 3.0 undecidable manual P 0.22 0
IV.GIGS.HHZ. 2019-09-21T22:38:49.69 3.0 undecidable manual P -0.09 0
IV.MMO1.EHZ. 2019-09-21T22:38:48.48 0.3 undecidable manual S 335 0.1088 143 -0.14 73
IV.FDMO.HHZ. 2019-09-21T22:38:48.73 3.0 undecidable manual P -0.22 0
IV.CSP1.EHZ. 2019-09-21T22:38:48.60 0.6 negative manual P 335 0.3211 109 -0.05 48
IV.RM33.EHZ. 2019-09-21T22:38:48.94 3.0 undecidable manual P -0.05 0
IV.TERO.HHZ. 2019-09-21T22:38:47.16 0.1 undecidable manual P 138 0.2374 117 -0.18 95
IV.NRCA.HHZ. 2019-09-21T22:38:47.19 3.0 positive manual P 0.07 0
IV.MTRA.HNZ. 2019-09-21T22:38:47.68 0.3 undecidable manual S 173 0.0441 163 -0.06 75
IV.OFFI.HHZ. 2019-09-21T22:38:47.78 0.6 positive manual P 58 0.2554 115 0.17 47
IV.MF5.EHZ. 2019-09-21T22:38:46.69 0.6 negative manual P 15 0.1934 124 0 49
IV.SMA1.EHZ. 2019-09-21T22:38:46.74 0.6 positive manual P 193 0.1745 127 0.31 46
IV.MTRA.HNZ. 2019-09-21T22:38:45.17 0.1 undecidable manual P 173 0.0441 163 0.05 100
IV.MMO1.EHZ. 2019-09-21T22:38:45.56 1.0 undecidable manual P 335 0.1088 143 -0.06 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:1.5 0.000294 0.12 AML other m 2019-09-21T22:38:47.76
IV.MTRA.EHE. ML:1.2 0.0001355 1.02 AML other m 2019-09-21T22:38:49.65
IV.SMA1.EHE. ML:1.6 0.0002365 0.28 AML other m 2019-09-21T22:38:50.86
IV.SMA1.EHN. ML:1.6 0.0002475 0.2 AML other m 2019-09-21T22:38:50.80
IV.NRCA.HHE. ML:1.8 0.0003335 0.14 AML other m 2019-09-21T22:38:51.65
IV.NRCA.HHN. ML:2 0.000564 1.28 AML other m 2019-09-21T22:38:52.69
IV.TERO.HHN. ML:1 4.435E-5 0.3 AML other m 2019-09-21T22:38:52.27
IV.TERO.HHE. ML:0.9 4.015E-5 1.02 AML other m 2019-09-21T22:38:52.26
IV.FDMO.HHE. ML:1 3.49E-5 0.18 AML other m 2019-09-21T22:38:54.42
IV.FDMO.HHN. ML:1.1 4.035E-5 0.32 AML other m 2019-09-21T22:38:54.63
IV.RM33.EHN. ML:1.2 5.16E-5 0.12 AML other m 2019-09-21T22:38:55.04
IV.RM33.EHE. ML:1.2 5.03E-5 0.16 AML other m 2019-09-21T22:38:55.23
IV.LNSS.HHE. ML:1.2 4.845E-5 1.12 AML other m 2019-09-21T22:38:55.29
IV.LNSS.HHN. ML:1.2 5.16E-5 0.94 AML other m 2019-09-21T22:38:55.98
IV.GAVE.EHN. ML:1.2 5.11E-5 0.28 AML other m 2019-09-21T22:38:57.43
IV.GAVE.EHE. ML:1.2 5.105E-5 0.26 AML other m 2019-09-21T22:38:57.84
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