Earthquake with magnitude of ML 1.7 on date 21-07-2019 and time 11:23:02 (Italy) in region 4 km SW Rocca Pia (AQ)

A magnitude ML 1.7 earthquake occured in region: 4 km SW Rocca Pia (AQ), on

  • 21-07-2019 09:23:02 (UTC)
  • 21-07-2019 11:23:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9, 13.95 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
Rocca Pia AQ 4 178 178
Scanno AQ 6 1847 2025
Pettorano sul Gizio AQ 8 1376 3401
Pescocostanzo AQ 10 1128 4529
Villalago AQ 10 568 5097
Rivisondoli AQ 10 700 5797
Roccaraso AQ 12 1627 7424
Cansano AQ 13 274 7698
Introdacqua AQ 13 2126 9824
Villetta Barrea AQ 14 653 10477
Campo di Giove AQ 15 803 11280
Civitella Alfedena AQ 15 296 11576
Bugnara AQ 15 1125 12701
Anversa degli Abruzzi AQ 16 341 13042
Bisegna AQ 16 223 13265
Barrea AQ 16 726 13991
Sulmona AQ 16 24557 38548
Opi AQ 17 420 38968
Pescasseroli AQ 17 2203 41171
Pacentro AQ 17 1174 42345
Palena CH 18 1392 43737
Castel di Sangro AQ 18 6538 50275
Scontrone AQ 19 574 50849
Prezza AQ 20 945 51794
Alfedena AQ 20 864 52658

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km SW of Chieti (51815 inhabitants)
66 Km SW of Pescara (121014 inhabitants)
68 Km SE of L'Aquila (69753 inhabitants)
70 Km S of Montesilvano (53738 inhabitants)
87 Km S of Teramo (54892 inhabitants)
96 Km E of Tivoli (56533 inhabitants)
97 Km NW of Caserta (76326 inhabitants)
99 Km NE of Latina (125985 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 2019-07-21
09:23:02
41.9 13.95 21 2019-07-21
09:33:32
Sala Sismica INGV-Roma 70763501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-07-21 09:23:02 ± 0.1
Latitude 41.90 ± 0.00
Longitude 13.95 ± 0.00
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 70763501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 298
Semi-minor axis of confidence ellipse (meter) 251
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 128
Circular confidence region, given by single value of horizontal uncertainty (meter) 300
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
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) 0.11421
Epicentral distance of station farthest from the epicenter (degree) 0.5306
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 70763501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-07-21 09:33:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TRIV.HHZ. 2019-07-21T09:23:19.12 0.6 undecidable manual S 107 0.4667 103 0.07 48
IV.LRP.EHZ. 2019-07-21T09:23:16.65 0.3 undecidable manual S 227 0.3732 108 0.26 69
IV.MIDA.HHZ. 2019-07-21T09:23:15.50 0.3 undecidable manual S 139 0.3444 109 -0.09 73
IV.T0110.HHZ. 2019-07-21T09:23:15.96 0.6 undecidable manual S 338 0.3516 109 0.18 48
IV.VAGA.HHE. 2019-07-21T09:23:13.16 0.6 undecidable manual P 156 0.5306 102 0.04 47
IV.POFI.HHZ. 2019-07-21T09:23:12.80 0.3 undecidable manual S 224 0.2572 117 -0.4 70
IV.RNI2.HHZ. 2019-07-21T09:23:12.83 0.6 undecidable manual S 143 0.2491 118 -0.17 49
IV.LPEL.HHZ. 2019-07-21T09:23:12.23 0.3 undecidable manual S 50 0.2248 122 -0.14 73
IV.TRIV.HHZ. 2019-07-21T09:23:12.33 0.3 undecidable manual P 107 0.4667 103 0.28 68
IV.VVLD.HHZ. 2019-07-21T09:23:12.84 0.3 undecidable manual S 262 0.2464 119 -0.08 74
IT.SULP.HGZ. 2019-07-21T09:23:11.50 0.3 undecidable manual S 354 0.1835 128 0.14 75
IV.T0110.HHZ. 2019-07-21T09:23:10.08 0.6 undecidable manual P 338 0.3516 109 -0.08 48
IV.LRP.EHZ. 2019-07-21T09:23:10.73 0.3 undecidable manual P 227 0.3732 108 0.22 70
IT.OPI.HGZ. 2019-07-21T09:23:10.62 0.3 undecidable manual S 216 0.1547 134 -0.11 76
IV.MIDA.HHZ. 2019-07-21T09:23:09.86 0.3 undecidable manual P 139 0.3444 109 -0.19 71
IV.CERA.HHE. 2019-07-21T09:23:09.55 0.3 undecidable manual P 171 0.3085 112 0.08 73
IV.INTR.HNZ. 2019-07-21T09:23:09.94 0.3 undecidable manual S 342 0.1142 143 0.01 77
IV.LPEL.HHZ. 2019-07-21T09:23:08.09 0.3 undecidable manual P 50 0.2248 122 -0.1 73
IV.VVLD.HHZ. 2019-07-21T09:23:08.44 0.3 undecidable manual P 262 0.2464 119 -0.07 74
IV.POFI.HHZ. 2019-07-21T09:23:08.60 0.6 undecidable manual P 224 0.2572 117 -0.07 49
IV.RNI2.HHZ. 2019-07-21T09:23:08.89 0.6 undecidable manual P 143 0.2491 118 0.33 47
IT.SULP.HGZ. 2019-07-21T09:23:07.58 0.1 undecidable manual P 354 0.1835 128 -0.03 100
IT.OPI.HGZ. 2019-07-21T09:23:07.22 0.3 undecidable manual P 216 0.1547 134 -0.03 76
IV.INTR.HNZ. 2019-07-21T09:23:06.89 0.3 undecidable manual P 342 0.1142 143 0.11 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LPEL.HHN. ML:1.8 0.0002975 0.44 AML other m 2019-07-21T09:23:14.22
IV.INTR.HNE. ML:2.4 0.001945 0.1 AML other m 2019-07-21T09:23:10.23
IV.INTR.HNN. ML:2.5 0.002345 0.1 AML other m 2019-07-21T09:23:10.17
IV.INTR.HHN. ML:2.6 0.00254 0.34 AML other m 2019-07-21T09:23:10.17
IV.VVLD.HHN. ML:2.1 0.0005595 0.12 AML other m 2019-07-21T09:23:13.07
IV.POFI.HHN. ML:1.2 7.635E-5 0.2 AML other m 2019-07-21T09:23:13.32
IV.RNI2.HHE. ML:0 0.000247 0.14 AML other m 2019-07-21T09:23:14.70
IV.RNI2.HNE. ML:0 0.000216 0.14 AML other m 2019-07-21T09:23:14.63
IV.RNI2.HNN. ML:0 0.000233 0.16 AML other m 2019-07-21T09:23:14.79
IV.RNI2.HHN. ML:0 0.0002422829 0.16 AML other m 2019-07-21T09:23:14.78
IV.LPEL.HHE. ML:1.9 0.0003495 0.12 AML other m 2019-07-21T09:23:15.09
IV.MIDA.HHE. ML:1.4 8.795E-5 0.16 AML other m 2019-07-21T09:23:17.08
IV.T0110.HHN. ML:1.7 0.00016 0.3 AML other m 2019-07-21T09:23:17.26
IV.T0110.HHE. ML:1.8 0.0002135 0.26 AML other m 2019-07-21T09:23:17.76
IV.VCEL.EHE. ML:1.5 7.27E-5 0.28 AML other m 2019-07-21T09:23:28.23
IV.TRIV.HHE. ML:0 5.67E-5 1.18 AML other m 2019-07-21T09:23:30.03
IV.TRIV.HHN. ML:0 4.635E-5 1.36 AML other m 2019-07-21T09:23:30.87
IV.LPEL.HNE. ML:1.8 0.0003322708 0.128 AML other m 2019-07-21T09:23:15.03
IV.VVLD.HHE. ML:1.8 0.0002543233 0.1024 AML other m 2019-07-21T09:23:13.00
IV.POFI.HHE. ML:1.2 7.295164E-5 0.1984 AML other m 2019-07-21T09:23:13.15
IV.MIDA.HNE. ML:1.5 9.95996E-5 0.3392 AML other m 2019-07-21T09:23:19.10
IV.MIDA.HHN. ML:1.4 9.087141E-5 0.1792 AML other m 2019-07-21T09:23:16.93
IV.LRP.EHE. ML:1.3 5.270678E-5 0.4224 AML other m 2019-07-21T09:23:21.80
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